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Department of Physics
Samarendra P Singh
Assistant Professor,
Department of Physics,
School of Natural Sciences
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Education Details
Ph.D., Indian Institute of Technology Kanpur (IITK), 2007
M.Sc., Banaras Hindu University Varanasi, 1997

Professional Experience
Research Scientist, Institute of Materials Research and Engineering (IMRE) A*STAR, Singapore

PHY101: Introduction to Physics-1
PHY102: Introduction to Physics-2
PHY205: Waves and Oscillations
PHY208: Advanced Experimental Physics-1
PHY550: Condensed Matter Physics
PHY551: Characterization techniques-1
PHY574: Characterization techniques-2

Research Interests
Current research in our group aims to innovate advanced electronic and optical materials and devices through fundamental understanding of their charge and energy transports processes. We develop and apply variety of new characterization tools appropriate for organic and inorganic semiconducting hetero-junction devices like light emitting diodes, transistors, solar cell, lasers and sensors. Also we are interested in fabricating new class of nano-electronic devices. Moreover, the in-depth understanding of structure-property-performance correlation is essential to devise the strategy in developing new class of electronic materials leading to diverse applications in next generation devices.

Select Publications
  1. "Molecular-shape-induced efficiency enhancement in PC61BM and PC71BM based ternary blend organic solar cells”, Shashi B. Srivastava, S. Srivastava and Samarendra P. Singh, J. Phys. Chem. C, DOI: 10.1021/acs.jpcc.7b04425 (2017).
  2. "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, K. T. Leung, Marlis K. Van Bael, K. Haenen, Susanta S. Roy, Electrochimica Acta, Elsevier, (2017).
  3. "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).
  4. “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 S. P. Singh, J. Phys. Chem. C, 119, 14890 (2015).
  5. Hiroyuki Matsuzaki, Akihiro Furube, Ryuzi Katoh, Samarendra P. Singh, Prashant Sonar, Evan Laurence Williams, Chellappan Vijila, Gomathy Sandhya Subramanian, Sergey Gorelik, and Jonathan Hobley, "Excited-state dynamics in diketopyrrolopyrrole-based copolymer for organic photovoltaics investigated by transient optical spectroscopy", Japanese Journal of Applied Physics, Vol. 53, 01AB11 (2014).
  6. Chellappan Vijila, Samarendra P. Singh, Evan Williams, Prashant Sonar, Almantas Pivrikas et. al., "Relation between charge carrier mobility and lifetime in organic photovoltaics", Journal of Applied Physics, Vol. 114, 184503 (2013).
  7. P. Sonar, E. L. Williams, S. P. Singh, S. Manzhos, and A. Dodabalapur, "A benzothiadiazole end capped donor-acceptor based small molecule for organic electronics.," Physical chemistry chemical physics: PCCP, Vol. 15, no. 40, pp. 17064-9, Sep. 2013.
  8. E. L. Williams, S. Gorelik, I. Phang, M. Bosman, C. Vijila, G. S. Subramanian, P. Sonar, J. Hobley, S. P. Singh, H. Matsuzaki, A. Furube, and R. Katoh, "Nanoscale phase domain structure and associated device performance of organic solar cells based on a diketopyrrolopyrrole polymer," RSC Advances, vol. 3, no. 43, p. 20113, 2013.
  9. Hendrik Glowatzki, Prashant Sonar, Samarendra P. Singh, Adrian Matthew Mak, Michael Brian Sullivan, Wei Chen, Andrew Thye Shen Wee, and Ananth Dodabalapur, "Band Gap Tunable N-Type Molecules for Organic Field Effect Transistors", Journal of Physical Chemistry C, Vol. 117, Page 11530?11539, (2013).
  10. P. Sonar, Samarendra P. Singh, Ling Tin Tin, Ananth Dodabalapur, " Dithienyl benzothiadiazole based donor-acceptor organic semiconductors and Effect of end capping groups on organic field effect transistor (OFET) performance", Australian journal of Chemistry, CSIRO publishing, Australia, Vol. 66, Issue: 3, Page: 370-380 (2013).
  11. Thelese Ru Bao Foong, Samarendra P. Singh*, Prashant Sonar, Zi-En Ooi, Khai Leok Chan and Ananth Dodabalapur "ZnO layers for opto-electronic applications from solution based and low-temperature processing of an organometallic precursor", Journal of Materials Chemistry,Vol. 22, Page 20896-20901 (2012), *Corresponding author.
  12. Yuning Li , Prashant Sonar , Samarendra P. Singh, Zi En Ooi , Erica S. H. Lek and Melissa Q. Y. Loh,"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", Phys. Chem. Chem. Phys., 2012, 14, 7162-7169, DOI: 10.1039/C2CP40937B.
  13. Zi-En Ooi, Thelese R. B. Foong, Samarendra P. Singh, Khai Leok Chan, and Ananth odabalapur,"A light emitting transistor based on a hybrid metal oxide-organic semiconductor lateral heterostructure Appl. Phys. Lett. 100, 093302 (2012); http://dx.doi.org/10.1063/1.3689758
  14. Tae-Jun Ha, Prashant Sonar, Samarendra P. Singh, and Ananth Dodabalapur, "Characteristics of High-Performance Ambipolar Organic Field-Effect Transistors Based on a Diketopyrrolopy-rrole-Benzothiadiazole Copolymer" IEEE Transactions on electron Devices, Vol. 59, No. 5, May 2012.
  15. Prashant Sonar, Thelese Ru Bao Foong, Samarendra P. Singh, Yuning Li, Ananth Dodabalapur "Furan- containing conjugated polymer for high mobility ambipolar organic thin film transistors", Chem. Communications, 48, 8383, 2012.
  16. Yuning Li , Bin Sun, Prashant Sonar , Samarendra P. Singh, "Solution processable poly(2,5-dialkyl-2,5-dihydro-3,6-di-2-thienyl-pyrrolo[3,4-c]pyrrole-1,4-dione) for ambipolar organic thin film transistors", Organic electronics, Vol. 13, 1606 (2012).
  17. Prashant Sonar, Jing-Mei Zhuo, Li-Hong Zhao, Kai-Ming Lim, Jihua Chen, Adam J. Rondinone, Samarendra P. Singh, Lay-Lay Chua, Peter K. H. Ho and Ananth Dodabalapur "Furan Substituted Diketopyrrolopyrrole and Thienylenevinylene Based Low Band Gap Copolymer for High Mobility Organic Thin Film Transistors" Journal of Materials Chemistry, 2012, 22 (33), 17284 - 17292.
  18. Prashant Sonar, Samarendra P. Singh, Evan L. Williams, Y. Li, Mui Siang Soh, Ananth Dodabalapur, "Furan containing diketopyrrolopyrole co-polymer: Synthesis, characterization, Organic field-effect transistor performance and photovoltaic properties", Journal of Material Chemistry, 2012, 22, 4425.
  1. P. Sonar, Samarendra P. Singh, Mui Siang Soh, Yuning Li, "Ambipolar polymeric semiconductor materials and organic electronic devices", US Patent US8624232 B2, Publication date Jan 7, 2014.
  2. Zhikuan Chen, Qinde Liu, Samarendra P. Singh and Achmad Zen, “Planar conjugated compounds and their applications for organic electronics”, United States Patent Application 20110303909, (based on International Patent Application No.: PCT/SG2009/000061).

  3. Prashant Sonar, Samarendra P. Singh, Soh Mui Siang, Li Yuning, “Ambipolar Polymeric Semiconductor Materials And Organic Electronic Devices”, United States Application No. 13/393,223 of PCT/SG2009/000174 filed on 30 April 2010.

  4. Chen Zhikuan, Li Jun, Beng Ong, Prashant Sonar, Kok Haw, Ng Ging Ming, Lim Siew Lay, Samarendra P. Singh, Li Yuning, “P-type Materials and Organic Electronic Devices”, United States Application No. 13/393,222 of PCT/SG2010/000175 filed on 30 April 2010.

  5. Chen Zhikuan, Li Jun, Beng Ong, Samarendra P. Singh, Kok Haw Ong; Ivy Wong Hoi Ka, “Polymeric  Semiconductors, Devices and Related Materials”, United States Application No. 13/393,218 of PCT/SG2009/000172 filed on 30 April 2010.

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

Select Research
Visitor Invesitgator program (VIP) phase I: "Novel Materials & Device Structures for Application OPV, OFET & OLEFET "; Role: Member.

Visitor investigator program (VIP) phase II: "Novel Materials & Device Structures for Application OPV, OFET & OLEFET"; Role: Co-PI and Member.

IMRE project "Preparation of Electron Deficient Core Aromatics for Solution Processable Organic Semiconductor Applications"; Role: Member.

A*STAR (Singapore)-JST (Japan) project on "Characterization of the fundamental charge generation and transport parameters of new OPV materials"; Role: Member.

National & International Recognition
Best poster Award, IWPSD, IIT Chennai, India (2003)

Dedicated service award, IMRE, A*STAR Singapore (2011)

Recent Conferences/Workshops attended
Indo-US workshop on Photovoltaic devices, IIT Kanpur, March 2014

ALIGARH NANO-IV, Indo-US international conference on Nanoscience and Nanotechnology, AMU Aligarh, March 2014

IUMRS - ICA2013 international conference at IISc Bangalore, December 2013

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