Correlation between surface photovoltage and blend morphology in polyfluorene-based photodiodes
Correlation between surface photovoltage and blend morphology in polyfluorene-based photodiodes
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DOI：
10.1021/nl047929s
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发表时间：
2005-04-01
期刊：
影响因子：
10.8
通讯作者：
Sirringhaus, H
中科院分区：
文献类型：
--
作者：
Chiesa, M;B端rgi, L;Sirringhaus, H
我们提出了聚芴基光伏结构中光生电荷产生的微观研究。扫描开尔文探针显微镜的亚 100 nm 横向分辨率可以表征聚（9,9'-二辛基芴-苯并噻二唑）（F8BT）和 聚-(9,9'-二辛基芴-共-双-N,N'-(4-丁基苯基)-双-N,N-苯基-1,4-苯二胺)(PFB)。根据表面光电压和混合形态之间的强相关性，我们提出了一个简单的横向和垂直薄膜结构模型，特别是识别具有最有效的光电流传导路径的区域。
We present a microscopic study of photoinduced charge generation in polyfluorene-based photovoltaic structures. The sub-100 nm lateral resolution of scanning Kelvin probe microscopy allows characterizing the three-dimensional structure of thin films of blends of poly-(9,9'-dioctylfluorene-co-benzothiadiazole) (F8BT) and poly-(9,9'-dioctylfluorene-co-bis-N,N'-(4-butylphenyl)-bis-N,N-phenyl-1,4-phenylenediamine) (PFB). From the strong correlation between surface photovoltage and blend morphology, we propose a simple model for the lateral and vertical film structure identifying in particular those regions with the most efficient conduction pathway for the photocurrent.