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Journal of Nanophotonics

Improving the efficiency of a poly(3-hexylthiophene)-CuInS2 photovoltaic device by incorporating graphene nanopowder
Author(s): Anita Kumari; Inderpreet Singh; Neetu Prasad; Shiv K. Dixit; Peta K. Rao; Pramod K. Bhatnagar; Parmatma C. Mathur; Charanjit S. Bhatia; Swati Nagpal
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Paper Abstract

In the present work, the effect of incorporation of graphene on the poly(3-hexylthiophene) (P3HT):CuInS 2 quantum dot (CIS QD)-based solar cell has been studied. For this purpose, the concentration of graphene is varied from 0 to 0.01% w/w in P3HT–CIS (1:0.5) film. It is found that graphene does not deteriorate the absorption of the composite film. It assists in dissociating the photogenerated excitons (both in P3HT and QDs) owing to its two-dimensional structure and high electron affinity as is evident by photoluminescence (PL) quenching. At 0.01% w/w concentration of graphene about ∼95% of PL is quenched. The electrical characteristics show that the incorporation of graphene enhances the efficiency of the device by establishing interconnected conducting pathways in the volume of polymer matrix. The maximum efficiency is observed to be 1.5% at 0.005% w/w content of graphene. However, at higher concentration, i.e., 0.01% w/w, the device starts deteriorating.

Paper Details

Date Published: 26 March 2014
PDF: 11 pages
J. Nanophoton. 8(1) 083092 doi: 10.1117/1.JNP.8.083092
Published in: Journal of Nanophotonics Volume 8, Issue 1
Show Author Affiliations
Anita Kumari, Univ. of Delhi South Campus (India)
Inderpreet Singh, Univ. of Delhi South Campus (India)
Neetu Prasad, Univ. of Delhi South Campus (India)
Shiv K. Dixit, Univ. of Delhi South Campus (India)
Peta K. Rao, Univ. of Delhi South Campus (India)
Pramod K. Bhatnagar, Univ. of Delhi South Campus (India)
Parmatma C. Mathur, Univ. of Delhi South Campus (India)
Charanjit S. Bhatia, National Univ. of Singapore (Singapore)
Swati Nagpal, Univ. of Delhi South Campus (India)


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