Abstract
AbstractWe 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 (JSC), and power conversion efficiency (PCE) improved. Incorporation of 2.5% SiNCs in the blend led to 13.6% improvement of JSC, 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.
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