Samarendra Singh | Department of Physics

Profile

Samarendra
Pratap
Singh
Associate Professor
Department of Physics
School of Natural Sciences (SoNS)
R006-E
Block-R, Shiv Nadar University
Gautam Buddha Nagar Uttar Pradesh
India
0120-3819100
Extn: 
218
Profile Summary 

Dr. Samarendra P. Singh received his Ph.D. (Physics) from Indian Institute of Technology Kanpur (IITK) in 2007. He joined Institute of Materials Research and Engineering (IMRE) Singapore in 2005. After working there as a research scientist for more than six years, he joined Shiv Nadar University (SNU) in 2011 as an Assistant Professor in the department of physics.

As a physics teacher, he aims to develop a strong understanding of physical concepts among his students and inspire them to apply it to the real-world context, solving problems using analytical skills, and clear expressions with arguments in presentations. Teaching Physics is at the core of his academic career and he has worked to develop an undergraduate (UG) and postgraduate (PG) curriculum at the department of physics, SNU. The unifying theme of his research is to explore and apply novel materials involving organic semiconductors and organic-inorganic hybrid materials for device applications in field-effect transistors, solar cells, light emitting diodes, lasers, and sensors. He endeavors to enrich the understanding of Physics of carbon-based molecular semiconductors with an aim to study charge transport and photophysics of organic semiconductors. He has published over 40 research papers in international journals, 15 patents, and supervised several undergraduate and Ph.D. students. One of his patent (US patent # US8624232) got licensed by Corning Inc., USA.

Educational Qualifications 
2005
Ph.D. (Physics)
Indian Institute of Technology Kanpur (IITK)
1995
M.Sc. (Physics)
Banaras Hindu University (BHU) Varanasi
1993
B.Sc. (Physics, Chemistry)
U. P. College (Autonomous Institution) Varanasi
Work Experience 
07/18Present
Associate Professor
Department of Physics, Shiv Nadar University (SNU)
Gautam Buddha Nagar (U.P.) India
I currently work here
08/11
06/18
Assistant Professor
Department of Physics, Shiv Nadar University (SNU)
Gautam Buddha Nagar (U.P.) INDIA
02/11
06/11
Scientist
Institute of Materials Research and Engineering (IMRE), A*STAR
Singapore
02/10
01/11
Senior Research Engineer/Research Scientist & Engineer-II
Institute of Materials Research and Engineering (IMRE), A*STAR
Singapore
08/05
01/10
Research Engineer/Research Scientist & Engineer-II
Institute of Materials Research and Engineering (IMRE), A*STAR
Singapore
Teaching & Research Interests: 

Teaching Interest:

As a physics teacher, I aim to develop a strong understanding of physical concepts among my students and inspire them to apply it to the real-world context, solving problems using analytical skills and clear expressions with arguments in presentations. Teaching Physics is at the core of my academic career and I have worked to develop an undergraduate (UG) and postgraduate (PG) curriculum at Department of Physics, Shiv Nadar University (SNU). Over the last six years, I have taught courses on Classical mechanics, Electrodynamics, Thermal Physics, Waves and oscillations, Analog and digital electronics, Condensed matter physics, Physics of semiconductor materials and devices, Characterization of materials, Physics of Photovoltaic devices and Energy for a sustainable development. Since Physics teaching laboratories are an integral part of physics education, I have worked to design and develop General physics, Advanced Physics, Electronics and Computational physics teaching laboratories at SNU.

Research Interest:

I have been working in the area of organic semiconductors for more than a decade now. My research expertise broadly lies in processing and characterization of organic semiconductors, fabrication, and characterization of organic and organic-inorganic hybrid devices. The unifying theme of my research is to explore and apply novel materials involving organic semiconductors and organic-inorganic hybrid materials for device applications in field-effect transistors, solar cells, light emitting diodes, lasers, and sensors. He endeavors to enrich the understanding of Physics of carbon-based molecular semiconductors with an aim to study charge transport and photophysics of organic semiconductors. At SNU, my research group is engaged in fabrication, characterization, and investigation of device physics of organic solar cells (in conventional and inverted architecture), organic light emitting diodes and thin-film transistors. I have contributed actively to develop world-class research capabilities for research at SNU in the area of materials science and physics. Using the experimental capabilities developed at SNU, an organic solar cell efficiency of ~9.3% has already been achieved.

Conferences (Select): 

       1. Shashi B. Srivastava and Samarendra P. Singh, “Elucidating the impact of molecular-shape of fullerenes in ternary polymer solar cells”, Invited talk in The First International Conference of Polymeric and Organic Materials organized at the Yamagata University, Japan (January 24-26, 2019).

       2. Yogesh Yadav and Samarendra P. Singh, “Electrolyte-Gated Organic Field-Effect Transistors: A Potential Biosensor Platform” Invited talk in Life Science Research & its Interface with Engineering and Allied Sciences (LSRIEAS), organized at BITS, Pilani.

      3. Sanjay Sahare, Lubna Khanam, Vinay Shankar and Samarendra P. Singh, “High Performance Semitransparent Polymer Solar Cells” presentation in the conference “International Conference on Nano-Structured Materials and Devices (ICNSMD-2018)”, December 17-20, 2018.

      4. Shashi B. Srivastava, S. K. Srivastava and Samarendra P. Singh, “8.5% Efficient Fullerene-Alloy Based Ternary Bulk Heterojunction Polymer Solar Cells”,  International workshop on Physics of semiconductor devices (IWPSD) 2017, New Delhi.

     5. Samarendra P. Singh, “Organic Photovoltaics: Research at Shiv Nadar University”, Workshop on flexible electronics, NCFlexiE IIT Kanpur, July 2017.

     6. Shashi B. Srivastava, Divambal A. Gupta, Bimlesh Lochab and Samarendra P. Singh, “Zinc oxide:organic semiconductor hybrid composite for an application in organic solar cells”, Materials Research Society (MRS) Fall 2017 meeting, Boston, USA.

     7. Shashi B. Srivastava and Samarendra P. Singh, “Proficient ternary blend organic photovoltaic device with PC61BM as an interface modulator”, APS March 2017 meeting, The American Physical Society, USA.

    8. Shashi B. Srivastava, M. H. Modi, Sajal K. Ghosh and Samarendra P. Singh, “Investigation of the buried interfaces in multi-layered inverted organic photovoltaic device using X-ray reflectivity”, MRS Spring 2016.

   9. Shashi B. Srivastava, M. H. Modi, Sajal K. Ghosh and Samarendra P. Singh, “Investigation of Interfacial Morphology in Bulk Heterojunction Organic Photovoltaic Device Using X-ray Reflectivity”, ISMC 2016 BARC, Mumbai.

   10. Samarendra P. Singh and Shashi B. Srivastava, “Charge transport studies in bulk heterojunction based inverted organic photovoltaic devices processed in room ambient”, Aligarh Nano 2016, AMU Aligarh.

  11. Shashi B. Srivastava, P. Sonar, Samarendra P. Singh, “Charge transport studies in a donor-acceptor type polymer PDPP-TNT:PCBM-C60 based bulk heterojunction devices”, IWPSD 2015, IISc Bangalore.

  12. Shashi B. Srivastava, P. Sonar, amarendra P. Singh, “Charge transport studies in a donor-acceptor type polymer PDPP-TNT and fullerene C-70 based bulk heterojunction devices”, ICMAT 2015 (28 June-3rd July 2015).

  13. C. Vijila, E. L. Williams, S. Gorelik, P. Sonar, G.S. Subramanian, J. Hobley, Samarendra P. Singh, H. Matsuzaki, A. Furube, and R. Katoh, “Organic solar cells: from photochemistry to device physics”, 8th Asian Photochemistry Conference 2014.

  14. Foong T. R. B. Thelese, Shashi B. Srivastava and Samarendra P. Singh, “Low temperature processed zinc oxide thin film for applications in flexible electronics”, Invited talk at 2nd International Symposium on Energy Challenges and Mechanics, Aberdeen, Scotland UK, August 2014.

  15. V. Singh and Samarendra P. Singh, “Generating a Protocol To Model Organic Photovoltaic Devices (OPVs) from Material Properties to their Quantum Efficiencies”, IEEE International   Conference on Green Computing, Communication and Electrical Engineering (ICGCCEE 2014).

  16. Samarendra P. Singh, “Device Physics of high performing organic field-effect transistor and organic photovoltaics devices based on donor (D) –acceptor (A) polymer semiconductors”, Invited talk at ALIGARH NANO-IV, Indo-US international conference on Nanoscience and Nanotechnology, Jointly organized by AMU, DRDO, CSIR and Ohio State University at ALIGARH, March 2014.

  17. C. Vijila, Samarendra P. Singh, E. L. Williams, P. Sonar, G.S. Subramanian, S. Gorelik, J. Hobley, H. Matsuzaki, A. Furube and R. Katoh ” Temperature and electric field dependence of charge mobility in bulk heterojunction solar cell based on a diketopyrrolo-pyrrole polymer”, Asian Photochemistry Conference 2012 (APC2012) at Osaka, Japan.

 18. E. L. Williams, Michel Bosman, C. Vijila, G.S. Subramanian, P. Sonar, S. Gorelik, J. Hobley, Samarendra P. Singh, H. Matsuzaki, A. Furube, and R. Katoh ” The influence of thin film morphology on the efficiency of organic solar cells based on a diketopyrrolopyrrole polymer”, Asian Photochemistry Conference 2012 (APC2012) at Osaka, Japan.

 19.  A. Furube, H. Matsuzaki,R. Katoh, E. L. Williams, C. Vijila, Samarendra P. Singh, S. Gorelik, P. Sonar and J. Hobley, “Fluorescence dynamics of organic photovoltaic PDPP polymer under high-density excitation condition: Estimation of exciton diffusion length”, Asian Photochemistry Conference 2012 (APC2012) at Osaka, Japan.

 20. R. Katoh, H. Matsuzaki, A. Furube, P. Sonar, G.S. Subramanian, Samarendra P. Singh, E. L. Williams, C. Vijila, S. Gorelik and J. Hobley, ” Time-resolved microwave photoconductivity study of OPV materials based on diketopyrrolopyrrole polymer”, Asian Photochemistry Conference 2012 (APC2012) at Osaka, Japan.

 21. H. Matsuzaki , A. Furube, R. Katoh, Samarendra P. Singh, P. Sonar, E. L. Williams, C. Vijila, G.S. Subramanian, S. Gorelik, P. Sonar and J. Hobley, “Femtosecond Absorption Spectroscopy of Diketopyrrolopyrrole Polymer Solar Cells Under Low-Density Excitation Condition”,  Asian Photochemistry Conference 2012 (APC2012) at Osaka, Japan.

  22.  Gomathy Sandhya Subramanian, Evan Williams, Vijila Chellappan, Prashant Sonar, Samarendra P. Singh, Ryuzi Katoh, Akihiro Furube, Jonathan Hobley and Sergey Gorelik,  “Fluorescence lifetime imaging to study blend morphology in bulk heterojunction solar cells”, MRS-Singapore Conference on Advanced Materials 2012.

  23.  Prashant Sonar, Evan L. Williams, Samarendra P. Singh, Ananth Dodabalapur “Thiophene-benzothiadiazole-thiophene (D-A-D) containing copolymers for organic  photovoltaics”, MRS-Singapore Conference on Advanced Materials 2012.

  24. Prashant Sonar, Samarendra P. Singh, Evan L. Williams, Yuning Li, Mui Siang Soh, Ananth Dodabalapur, “Furan based diketopyrrolopyrrole copolymers: promising materials for organic electronics” MRS-Singapore Conference on Advanced Materials 2012.

  25. C. Vijila, E. Naveen Kumar, Samarendra P. Singh , Evan Williams, Prashant Sonar, S. Gomathy Sandhya, Sergey Gorelik, Jonathan Hobley, Akihiro Furube, and Ryuzi Katoh, “Study of charge transport and recombination properties in a bulk heterojunction solar cell using diketopyrrolopyrole-naphthalene”, International Conference on Science and Technology of Synthetic Metals 2012 (ICSM 2012), July 8-13, 2012, Atlanta, GA, USA

  26. Prashant Sonar, Samarendra P. Singh, Yuning Li, Zi-En Ooi, Tae-jun Ha, Evan L. Williams, Ananth Dodabalapur, “Diketopyrrolopyrrole - A Versatile Conjugated Building Block for Organic Electronics”, 8th International        Conference on Organic Electronics – ICOE 2012 , June 25-27, Universitat Rovira i Virgili Campus, Tarragona, Spain.

  27. Samarendra P. Singh, Prashant Sonar, Chellappan Vijila, Ooi Zi En, Evan Williams, Sergey Gorelik  and Ananth Dodabalapur, “Device Physics of high performing organic field-effect transistor and organic photovoltaic devices based on Diketopyrrolopyrole naphthalene polymer”, International workshop on Physics of Semiconductor devices, December 19-22, 2012, I.I.T. Kanpur, INDIA.

  28. Samarendra P. Singh,  Zi-En Ooi, Ananth Dodabalapur, “Organic heterostructure based field-effect transistors”, Workshop on characterizations for OPV materials and devices on 2nd September 2011 at National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan.

Awards(Selected): 
2001

Best Poster Award in “12th International Workshop on The Physics of Semiconductor Devices” at IITM, Chennai held from 16-20 Dec. 2003.

2009

Dedicated Service Award 2011, IMRE A*STAR Singapore.

2012

Awarded with “Excellence” award for teaching and services at SNU for the period 2011-2014.

Scholarly Activity

Projects

1. Development of sensors for blast and blight diseases and stomatal activity measurement in rice (O. Sativa L.);

    Principal Investigator (PI): Samarendra P. Singh, Co-PI: S. K. Ghosh;

   Collabarative centres: IAS, BHU, BITS Pilani, IIT Roorkee and AU-KBC Research Centre, Chennai 

   Funding Agency: NASF, ICAR; Sanctioned Amount:  2.4 Cr 

   Period: 2019-2022

2. FIST Infrastructure development Project 2017

    PI: S. Dhar, Co-PIs: Samarendra P. Singh, A. Kanjilal, P. Johari, S. S. Roy, S. Ghosh & B. Kaviraj 

    Funding Agency: DST; Sanctioned Amount: 1.89 Cr

3. Efficient Large-Area Semi-Transparent Organic Photovoltaic (STOPV) Devices For Power Generating Window Applications

    PI: Samarendra P. Singh; Co-PI: Aloke Kanjilal 

    Funding agency: Technology mission DST, Government of India; Sanctioned Amount: INR 47.25 Lakhs;

    Period (2017-2020)

Patent

Indian Patent: “White light emitting Zinc based OLED” Inventors: Y. N. Mohapatra, Samarendra P. Singh, S. S. Manoharan, and Q. Mohammad [India Patent No.: 1776/DEL/2004 A; Publication date: 22/09/2006].

PCT Patent application: “Quinoid compounds and their applications for organic electronics” Inventors:  C. Zhikuan, L. Qinde, Samarendra P. Singh and A. Zen [Patent no.: WO/2010/096019, PCT/SG2009/000061; Publication date: 26 August 2010].

PCT and Taiwanese Patent application: “Polymeric semiconductors and electronics device thereof” Inventors: C. Zhikuan; L. Jun; B. Ong; Samarendra P. Singh; K. H. Ong; Ivy W. H. Ka [Patent no.: WO/2011/025453, PCT/SG2010/000172; Publication date: 03 March 2011].

PCT and Taiwanese Patent Application (claiming priority to US provisional patent application 61/272,182 filed on 28 August 2009):  “Polymer semiconductors comprising benzothiadiazole and its analogs for ambipolar OTFTs” Inventors: P. Sonar; Samarendra P. Singh; S. M. Siang; Y. Li [Patent no.: WO/2011/025454, PCT/SG2010/000174; Publication date: 03 March 2011].

PCT and Taiwanese Patent Application (claiming priority to US provisional patent application 61/272,182 filed on 28 August 2009):  “P-type polymer semiconductors for organic electronics” Inventors: C. Zhikuan; L. Jun; B. Ong; P. Sonar; K. H. Ong; N. G. Meng; L. S. Lay; Samarendra P. Singh; Y. Li [Patent no.: WO2011/025455, PCT/SG2010/000175; Publication date: 03 March 2011].

United States Patent Application: “Planar conjugated compounds and their applications for organic electronics” Inventors: C. Zhikuan, L. Qinde, Samarendra P. Singh and A. Zen [United States Patent Application No.: 13/202752, Publication No.: 20110303909, Publications date: 15 December 2011].

United States Patent Applications: “Ambipolar Polymeric Semiconductor Materials And Organic Electronic Devices”, Inventors: P. SONAR; Samarendra P. Singh; S. M. Siang; Y. Li [US Application No. 13/393,223 of PCT/SG2009/000174 filed 30 April 2010].

United States Patent Applications: “P-type Materials and Organic Electronic Devices”, Inventors: C. Zhikuan, L. Jun, B. ONG, P. SONAR, K. H. Ong, N. G. Meng, L. S. Lay, Samarendra P.  Singh, Y. Li [US Application No. 13/393,222 of PCT/SG2010/000175 filed on 30 April 2010].

United States Patent Applications: “Polymeric Semiconductors, Devices, And Related Methods”, Inventors: C. Zhikuan; L. Jun; B. ONG; Samarendra P. Singh; K. H. Ong; I. WONG Hoi Ka [US Application No. 13/393,218 of PCT/SG2009/000172 filed 30 April 2010].

Chinese Patent Applications: “P-type Materials and Organic Electronic Devices” Inventors: Chen Zhikuan, Li Jun, Beng Ong, Prashant Sonar, Kok Haw, Ng Ging Ming, Lim Siew Lay, Samarendra P. Singh, Li Yuning.[ Application No. 201080044620.5 filed on 01 April 2012].

Patent Application: “Fullerene-based hybrid inorganic-organic composites and synthesizing method thereof” is filed. Inventors: Shashi B. Srivastava and Samarendra P. Singh; Patent Appl. No.: 201711040818; Filing date: November 15, 2017.

Journal Publications (accepted or published)

(Selected)

  1. Structure-Property Relationship in an Organic Semiconductor: Insights from Energy Frameworks, Charge Density Analysis and Diode Device, Kunal Jha, Yogesh Yadav, Shashi Srivastava, Dwaipayan Chakraborty, Priya Johari, Samarendra Pratap Singh; Parthapratim Munshi, Crystal Growth & Design, DOI: 10.1021/acs.cgd.9b00244, (2019).
  2. Investigation of the buried planar interfaces in multi-layered inverted organic solar cells using X-ray reflectivity and impedance spectroscopy, Shashi. B. Srivastava, M. H. Modi, Sajal. K. Ghosh and Samarendra P. Singh, Journal of Physics-Condensed Matter, 31 (12),124003 (2019)
  3. Vinylene and benzo[c][1,2,5]thiadiazole: effect of the π-spacer unit on the properties of bis(2-oxoindolin-3-ylidene)-benzodifuran-dione containing polymers for n-channel organic field-effect transistors, Thu. T. Do, Basanagouda B. Patil, Samarendra P. Singh, Soniya D. Yambem, Krishna Feron, Kostya K. Ostrikov, John M. Bell, Prashant Sonar, RSC Adv., 8, 38919 (2018).
  4. Sustainable one-step strategy towards low temperature curable superparamagnetic composite based on smartly designed Iron nanoparticles and cardanol benzoxazine, Monisha, N. Yadav, Shashi B. Srivastava, Samarendra P. Singh, Bimlesh Lochab, Journal of Materials Chemistry A, 6, 2555 (2018).
  5. Strategical Designing of Donor-Acceptor-Donor based Organic Molecules for Tuning their Linear Optical Properties, R. Sen, Samarendra P. Singh, P. Johari, Journal of Physical Chemistry A, 122, 492 (2017).
  6. Molecular-Shape-Induced Efficiency Enhancement in PC61BM and PC71BM Based Ternary Blend Organic Solar Cells, Shashi B. Srivastava, S. K. Srivastava and Samarendra P. Singh; Journal of Physical Chemistry C 121, 17104, (2017).
  7. Probing the flat band potential and effective electronic carrier density in vertically aligned nitrogen-doped diamond nanorods via electrochemical method, Gourav Bhattacharya, S. K. Jothiramalingam, Shashi B. Srivastava, J. P. Thomas, S. Deshmukh, Paulius Pobedinskas, Samarendra P. Singh, Kam Tong Leung, Marlies K. Van Bael, Ken Haenen, Susanta Sinha Roy, Electrochimica Acta, 246, 68 (2017).
  8. Analysis of degradation mechanisms in donor-acceptor copolymer based organic photovoltaic devices using impedance spectroscopy, Shashi B. Srivastava, P. Sonar and Samarendra P. Singh, Materials Research Express 3, 096202 (2016).
  9. Charge transport studies in donor-acceptor block copolymer PDPP-TNT and PC71BM based inverted organic photovoltaic devices processed in room conditions, Shashi B. Srivastava, P. Sonar and Samarendra P. Singh, AIP Advances 5, 077177 (2015).
  10. Dependence of the Structure and Electronic Properties of D-A-D Based Molecules on the D/A Ratio and the Strength of the Acceptor Moiety, P. Johari and Samarendra P. Singh, J. Phys. Chem. C, 119, 14890 (2015).
  11. Excited-state dynamics in diketopyrrolopyrrole-based copolymer for organic photovoltaics investigated by transient optical spectroscopy, H. Matsuzaki, A. Furube, R. Katoh, Samarendra P. Singh, P. Sonar, E. L. Williams, C. Vijila, G. S. Subramanian, S. Gorelik, and J. Hobley, Jap. J. of Appl. Phys., Vol. 53, 01AB11 (2014).
  12. Relation between charge carrier mobility and lifetime in organic photovoltaics, C. Vijila, Samarendra P. Singh, E. L. Williams, P. Sonar, A. Pivrikas et. al., J. App. Phys., Vol. 114, 184503 (2013).
  13. A benzothiadiazole end capped donor-acceptor based small molecule for organic electronics, P. Sonar, E. L. Williams, Samarendra P. Singh, S. Manzhos, and A. Dodabalapur, Phys. Chem. Chem. Phys., Vol. 15, 17064 (2013).
  14. Nanoscale phase domain structure and associated device performance of organic solar cells based on a diketopyrrolopyrrole polymer, E. L. Williams, S. Gorelik, I. Phang, M. Bosman, C. Vijila, G. S. Subramanian, P. Sonar, J. Hobley, Samarendra P. Singh, H. Matsuzaki, A. Furube, and R. Katoh, RSC Adv., Vol. 3, 20113 (2013).
  15. Band Gap Tunable N-Type Molecules for Organic Field-Effect Transistors, H. Glowatzki, P. Sonar, Samarendra P. Singh, A. M. Mak, M. B. Sullivan, W. Chen, A. T. S. Wee, and A. Dodabalapur, J. of Phys. Chem. C, Vol. 117, 11530 (2013).
  16. Dithienyl benzothiadiazole based donor-acceptor organic semiconductors and Effect of end capping groups on organic field effect transistor (OFET) performance, P. Sonar, Samarendra P. Singh, L. T. Tin, A. Dodabalapur, Austr. J. Chem., CSIRO Publishing, Australia, Vol. 66, 370 (2013).
  17. ZnO layers for optoelectronic applications from solution-based and low-temperature processing of an organometallic precursor, Thelese R. B. Foong, Samarendra P. Singh, P. Sonar, Z.-E. Ooi, K. L. Chan,  A. Dodabalapur,  J.  Mater. Chem., Vol. 22, 20896 (2012).
  18. Poly(2,5-bis(2-octyldodecyl)-3,6-di(furan-2-yl)-2,5-dihydro-pyrrolo[3,4-c] pyrrole-1,4-dione-co-thieno[3,2-b]thiophene): a high performance polymer semiconductor for both organic thin film transistors and organic photovoltaics, Y. Li ,  P. Sonar ,  Samarendra P. Singh ,  Z.-E. Ooi ,  E. S. H. Lek and M. Q. Y. Loh, Phys. Chem. Chem. Phys., Vol. 14, 7162 (2012).
  19. A light emitting transistor based on a hybrid metal oxide-organic semiconductor lateral heterostructure, Z.-E. Ooi, Thelese R. B. Foong, Samarendra P. Singh, K. L. Chan, and A. Dodabalapur, Appl. Phys. Lett., Vol. 100, 093302 (2012).
  20. Characteristics of high-performance ambipolar organic field-effect transistors based on Diketopyrrolopyrrole-Benzothiadiazole copolymer, T.-J. Ha, P. Sonar, Samarendra P. Singh, and A. Dodabalapur,  IEEE Trans. Elect. Dev., Vol. 59, 5 (2012).
  21. Furan containing diketopyrrolopyrrole copolymers: synthesis, characterization, organic field effect transistor performance and photovoltaic properties, P. Sonar, E. L. Willams, Samarendra P. Singh, and A. Dodabalapur, J. Mater. Chem., Vol. 12, 4425 (2012).
  22. Analysis and modeling of lateral heterostructure based bipolar field-effect transistors, Z.-E. Ooi, Samarendra P. Singh, and A. Dodabalapur, Org. Elect., Vol. 12, 1794 (2011).
  23. 3,6-Di(furan-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione and bithiophene copolymer with random chain orientation showing high mobility in organic thin film transistors, Y. Li, P. Sonar, Samarendra P. Singh, W. Zeng, and M. S. Soh, J.  Mater. Chem., Vol. 21, 10829 (2011). 
  24. Thiophene-benzothiadiazole-thiophene (D-A-D) Based Polymers: Effect of    Donor/Acceptor Moieties Adjacent to D-A-D Segment on Photophysical and Photovoltaic Properties, P. Sonar, E. L. Willams, Samarendra P. Singh, and A. Dodabalapur,  J. Mater. Chem., Vol. 21, 10532 (2011).   
  25. High mobility organic thin-film transistor and efficient photovoltaic devices using versatile donor-acceptor polymer semiconductor by molecular design, P. Sonar, Samarendra P. Singh, Y. Li, I. Wong, Z.-E. Ooi, M. S. Soh, and A. Dodabalapur, Energy & Envi. Sci., Vol. 4, 2288 (2011). 
  26. Thermoelectric measurements using different tips in atomic force microscopy, S. S. Kushvaha, W. Hofbauer, L. Y. Chong, Samarendra P. Singh, and S. O’shea, J. Appl. Phys., Vol. 109, 084341 (2011).
  27. Electrical characteristics of Zinc oxide-organic semiconductor lateral heterostructure based hybrid field-effect bipolar transistors, Samarendra P. Singh, Z.-E. Ooi, S. N. L. Geok, G. K. L. Goh, and A. Dodabalapur,  Appl. Phys. Lett., Vol. 98, 073302 (2011).
  28. Annealing-Free High-Mobility Diketopyrrolopyrrole-quaterthiophene copolymer for Solution-Processed Organic Thin Film Transistors, Y. Li, P. Sonar, Samarendra P. Singh, P. Sonar, M. S. Soh, M. van Meurs, and J. Tan, , J. Am. Chem. Soc., Vol. 133, 2198  (2011)
  29. A low band gap Diketopyrrolopyrole-benzothiadiazole based copolymers for High-Mobility Ambipolar Organic Thin-Film Transistors, P. Sonar, Samarendra P. Singh, M. S. Soh, Y. Li, and A. Dodabalapur, Adv. Mater., Vol. 22, 5409 (2010)
  30. A high mobility p-type DPP-thieno[3,2-b]thiophene copolymer for organic thin film transistors, Y. Li, Samarendra P. Singh, and P. Sonar”, Adv. Mater., Vol. 22, 4862 (2010).
  31. Synthesis of thieno[3,2-b]thiophene derived conjugated oligomers for field-effect transistors applications, T. Weihua, Samarendra P. Singh, K. H. Ong, and C. Zhikuan, J. Mater. Chem., Vol. 20, 1497 (2010). 
  32. Electron transport in copper phthalocyanines, Samarendra P. Singh, A. Sellinger, and A. Dodabalapur, J. App. Phys., Vol. 107,  044509 (2010).
  33. Electrical characteristics of lateral heterostructure organic field-effect bipolar transistors, Samarendra P. Singh, P. Sonar, A. Sellinger, and A. Dodabalapur,  App. Phys. Lett., Vol. 94, 013308 (2009).
  34. Synthesis, characterization and comparative study of thiophene-benzothiadiazole based donor–acceptor–donor (D–A–D) materials, P. Sonar, Samarendra P. Singh, P. Leclere, M. Surin, R. Lazzaroni, T. T. Lin, A. Dodabalapur, and A. Sellinger, J. of Mater. Chem., Vol. 19, 3228  (2009).
  35. High Mobility Organic Field-Effect Transistors Based on Benzothiadiazole Sandwiched Dihexyl-Quaterthiophenes, P. Sonar, Samarendra P. Singh, S. Sudhakar, A. Dodabalapur, and A. Sellinger, Chem. of Mater., Vol. 20, 3184 (2008).