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Effects of incorporation of copper sulfide nanocrystals on the performance of P3HT: PCBM based inverted solar cells

DSpace at IIT Bombay

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Title Effects of incorporation of copper sulfide nanocrystals on the performance of P3HT: PCBM based inverted solar cells
 
Creator GOLLU, SR
SHARMA, R
SRINIVAS, G
KUNDU, S
GUPTA, D
 
Subject PL quenching
Cu2S nanocrystals
P3HT: PCBM
Impedance spectroscopy
Effective lifetime
Global mobility
POLYMER PHOTOVOLTAIC CELLS
IMPEDANCE SPECTROSCOPY
ZNO NANOPARTICLES
SELF-ORGANIZATION
CHARGE-TRANSPORT
MORPHOLOGY
STABILITY
PHOTOCURRENT
MOBILITY
DEVICES
 
Description It has been reported that performance of bulk heterojunction organic solar cells can be improved by incorporation of an additive like metal and semiconducting nanoparticles in the active layer. Here in, we have synthesized Cu2S nanocrystals (NCs) by chemical route and studied its dispersion in poly (3-hexylthiophene) [6, 6]-phenyl C61-butyric acid methyl ester (P3HT: PCBM) matrix. Variation in the performance parameters with change in the concentration of Cu2S NCs into the P3HT: PCBM matrix has also been studied and it was found that the inverted geometry device with concentration of 20 wt% of Cu2S NCs and having the structure ITO/ZnO (NPs)/P3HT: PCBM: Cu2S NCs/MoO3/Al has shown maximum efficiency of 3.39% which is more than 100% increase in comparison with devices without Cu2S NCs. Photoluminescence measurements studies unveiled that the incorporation of Cu2S NCs into a P3HT: PCBM matrix has helped in quenching photoluminescence which suggests more effective exciton dissociation at the interfaces between the P3HT and PCBM domains. The Nyquist plots obtained from impedance spectroscopy at 1 V bias in the dark has suggested the effective lifetime and global mobilities for P3HT: PCBM as 0.267 ms and 1.17 x 10(-3) cm(2)/V-S and for P3HT: PCBM: Cu2S NCs (20 wt%) systems as 0.156 ms and 2.02 x 10(-3) cm(2)/V-S respectively. Based on observed photoluminescence quenching, calculated effective lifetime and global mobility, we have tried to explain the possible reason for improvement in the efficiency with the very well dispersion of Cu2S NCs into the P3HT: PCBM matrix. (C) 2014 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-12-28T17:29:52Z
2014-12-28T17:29:52Z
2014
 
Type Article
 
Identifier ORGANIC ELECTRONICS, 15(10)2518-2525
1566-1199
1878-5530
http://dx.doi.org/10.1016/j.orgel.2014.06.035
http://dspace.library.iitb.ac.in/jspui/handle/100/16992
 
Language English