材料科学
光电流
退火(玻璃)
光电子学
活动层
聚噻吩
聚合物太阳能电池
光伏系统
富勒烯
异质结
有机太阳能电池
薄膜
电流密度
光活性层
光电导性
太阳能电池
图层(电子)
复合材料
纳米技术
聚合物
导电聚合物
薄膜晶体管
有机化学
化学
生态学
物理
量子力学
生物
作者
Lichang Zeng,Ching W. Tang,Shaw H. Chen
摘要
The effect of thermal annealing on photovoltaic devices comprising poly(3-hexylthiophene):[6,6]-phenyl C61 butyric acid methyl ester (P3HT:PCBM) with thicknesses up to 1200 nm was investigated. Without thermal annealing, the efficiency of the as-prepared devices decreased with increasing active layer thickness, reflecting largely a reduction in the short-circuit current density and an inverse photocurrent spectral response. Thermal annealing of the full devices was found to substantially recover thick-film device efficiencies while reducing the thin-film device efficiencies. The profound variations in photovoltaic characteristics were interpreted in terms of vertical phase separation in the P3HT:PCBM blend film and Li+ diffusion from the LiF/Al contact.
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