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

نویسندگان

  • P C Reshmi Varma
  • Manoj A G Namboothiry
چکیده

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.

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عنوان ژورنال:
  • Physical chemistry chemical physics : PCCP

دوره 18 5  شماره 

صفحات  -

تاریخ انتشار 2016