Charge transport and efficiency in photovoltaic devices based on polyfluorene blends

被引：2
|
作者：
Snaith, HJ [1 ]
Malone, IB [1 ]
Ramsdale, CM [1 ]
Friend, RH [1 ]
Greenham, NC [1 ]
机构：
[1] Cavendish Lab, Cambridge CB3 0HE, England
来源：
ORGANIC PHOTOVOLTAICS V | 2004年 / 5520卷
关键词：
photovoltaic devices; conjugated polymers; open-circuit voltage;
D O I：
10.1117/12.559631
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Polymer blends allow control of microstructure in donor-acceptor photovoltaic devices. Here we present measurements of devices containing polyfluorene blend layers of different thicknesses, and we are able to extract characteristic transport lengths for electrons and holes. We also present analytical and numerical modeling of single-layer and bilayer photovoltaic devices, which demonstrates the importance of bound polaron pairs formed after the initial electron transfer from donor to acceptor. Field-assisted dissociation of these polaron pairs is a critical process in determining device performance.
引用
收藏
页码：26 / 35
页数：10
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