材料科学
聚合物太阳能电池
活动层
异质结
光电子学
富勒烯
有机太阳能电池
光伏系统
氧化物
光活性层
图层(电子)
能量转换效率
纳米技术
化学工程
聚合物
复合材料
有机化学
生态学
化学
工程类
冶金
生物
薄膜晶体管
作者
Chang‐Yong Nam,Dong Su,Charles T. Black
标识
DOI:10.1002/adfm.200900311
摘要
Abstract High photovoltaic device performance is demonstrated in ambient‐air‐processed bulk heterojunction solar cells having an active blend layer of organic poly(3‐hexylthiophene) (P3HT): [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester (PCBM), with power conversion efficiencies as high as 4.1%, which is comparable to state‐of‐the‐art bulk heterojunction devices fabricated in air‐free environments. High‐resolution transmission electron microscopy is combined with detailed analysis of electronic carrier transport in order to quantitatively understand the effects of oxygen exposure and different thermal treatments on electronic conduction through the highly nanostructured active blend network. Improvement in photovoltaic device performance by suitable post‐fabrication thermal processing results from the reduced oxygen charge trap density in the active blend layer and is consistent with a corresponding slight increase in thickness of an ∼4 nm aluminum oxide hole‐blocking layer present at the electron‐collecting contact interface.
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