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Squaraine based solution processed inverted bulk heterojunction solar cells processed in air

Abstract

Content

Inverted bulk heterojunction solar cells based on low temperature solution processed squaraine (SQ) and [6,6]-phenyl C71 butyric acid methyl-ester (PC71BM) with varying blend ratios were made in air. An optimized bulk heterojunction device of SQ and PC71BM (with a blend ratio of 1 : 6) showed a power conversion efficiency (PCE) of 2.45% with an incident photon to current conversion efficiency of 65% at 680 nm and a spectral window extending to the NIR region. The devices also showed an enhanced PCE value of 4.12% upon continuous illumination from an AM1.5G light source of intensity 1 Sun. The intensity dependent photocurrent studies showed a monomolecular recombination mechanism in the photovoltaic device performance. The device stored in air showed reasonable stability for a period of one month.


 

Graphical abstract: Squaraine based solution processed inverted bulk heterojunction solar cells processed in air
Authors :P. C. Reshmi Varmaa and Manoj A. G. Namboothiry*a
Year :2015
School :Physics
Genre :Jurnal Article
Journal :Advance Article
Volume :
Pages :
DOI :http://dx.doi.org/10.1039/C5CP05080D
ARXIV :