The Effects of Improved Photoelectric Properties of PEDOT:PSS by Two-Step Treatments on the Performance of Polymer Solar Cells Based on PTB7-Th:PC71BM

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• 作者：Ling Zhao ; Suling Zhao ; Zheng Xu ; Di Huang ; Jiao Zhao ; Yang Li ; Xurong Xu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：January 13, 2016
• 年：2016
• 卷：8
• 期：1
• 页码：547-552
• 全文大小：433K
• ISSN：1944-8252

文摘

In this paper, we present a smart two-step treated method to simultaneously improve the work function, conductivity, and transmittance of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS). With the two-step treated PEDOT:PSS, the short-circuit current density of polymer solar cells (PSCs) based on PTB7-Th:PC₇₁BM increases from 13.41 to 22.10 mA/cm², and the power conversion efficiency increases from 7.35% to 9.82% with 33% improvement. The underlying mechanisms on performance improvement of PSCs can be summarized as follows: (1) two-step treated PEDOT:PSS with the improved work function and the conductivity, which contributes significantly to the charge collection of PSCs; and (2) two-step treated PEDOT:PSS with higher transmittance, which is of benefit to the light absorption of the active layer in PSCs.