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Improved Photovoltaic Performance of MEH‐PPV/PCBM Solar Cells via Incorporation of Si Nanocrystals
Author(s) -
Yan Quanxiang,
Zuo Lijian,
Gu Zhuowei,
Yang Ligong,
Wang Rong,
Wang Mang,
Chen Hongzheng
Publication year - 2013
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201300303
Subject(s) - energy conversion efficiency , chemistry , photovoltaic system , polymer solar cell , cathode , quantum efficiency , nanocrystal , optoelectronics , nanotechnology , materials science , ecology , biology
We have studied the effect of silicon nanocrystals (SiNCs) as a third component on performance of organic bulk heterojunction solar cells composed of poly[2‐methoxy,5‐(2′‐ethylhexyloxy)‐1,4‐phenylene vinylene] (MEH‐PPV):[6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM) blend film. By adding suitable amounts of SiNCs into MEH‐PPV:PCBM blend, the device performance such as external quantum efficiency, short circuit current density ( J SC ), and power conversion efficiency (PCE) improved. Incorporation of 2.5% SiNCs in the blend led to 13.6% improvement of J SC , which in turn resulted in 18% improvement of PCE up to 2.28%. The improved performance was mainly due to the improvements both in the charge generation from the interface of MEH‐PPV/SiNCs and the charge collection at the cathode.