Effects of pentacene-doped PEDOT:PSS as a hole-conducting layer on the performance characteristics of polymer photovoltaic cells
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- 作者：Hyunsoo Kim (1)
Jungrae Lee (1)
Sunseong Ok (1)
Youngson Choe (1) - 关键词：electronic materials ; polymers ; vapor deposition ; electrochemical measurement ; electrochemical properties
- 刊名：Nanoscale Research Letters
- 出版年：2012
- 出版时间：December 2012
- 年：2012
- 卷：7
- 期：1
- 全文大小：856KB
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Jungrae Lee (1)
Sunseong Ok (1)
Youngson Choe (1)
1. Department of Chemical Engineering, Pusan National University, Busan, 609-735, South Korea - ISSN：1556-276X
文摘
We have investigated the effect of pentacene-doped poly(3,4-ethylenedioxythiophene:poly(4-styrenesulfonate) [PEDOT:PSS] films as a hole-conducting layer on the performance of polymer photovoltaic cells. By increasing the amount of pentacene and the annealing temperature of pentacene-doped PEDOT:PSS layer, the changes of performance characteristics were evaluated. Pentacene-doped PEDOT:PSS thin films were prepared by dissolving pentacene in 1-methyl-2-pyrrolidinone solvent and mixing with PEDOT:PSS. As the amount of pentacene in the PEDOT:PSS solution was increased, UV-visible transmittance also increased dramatically. By increasing the amount of pentacene in PEDOT:PSS films, dramatic decreases in both the work function and surface resistance were observed. However, the work function and surface resistance began to sharply increase above the doping amount of pentacene at 7.7 and 9.9 mg, respectively. As the annealing temperature was increased, the surface roughness of pentacene-doped PEDOT:PSS films also increased, leading to the formation of PEDOT:PSS aggregates. The films of pentacene-doped PEDOT:PSS were characterized by AFM, SEM, UV-visible transmittance, surface analyzer, surface resistance, and photovoltaic response analysis.