Effects of ultraviolet light on electrical properties of PEDOT:PSS film

Xing Yingjie; Qian Minfang; Wang Guiwei; Zhang Gengmin; Guo Dengzhu

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Effects of ultraviolet light on electrical properties of PEDOT:PSS film

Xing Yingjie * #,Qian Minfang,Wang Guiwei,Zhang Gengmin,Guo Dengzhu

Department of Electronics, Peking University, Beijing 100871

*Correspondence author

#Submitted by

Subject:

Funding: National Natural Science Foundation of China（No.Grant Nos 61076057, 61171023）, the Specialized Research Fund for the Doctoral Program of High Education（No.No. 20090001120024）, MOST of China （No.Grant Nos 2012CB932701, 2011CB933001）

Opened online:19 February 2013

Accepted by: none

Citation: Xing Yingjie,Qian Minfang,Wang Guiwei.Effects of ultraviolet light on electrical properties of PEDOT:PSS film[OL]. [19 February 2013] http://en.paper.edu.cn/en_releasepaper/content/4520604

The performance of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) film is highly dependent on its in organic optoelectronic devices Conductivity and work function. Significant improvements of conductivity and work function are achieved by irradiation of PEDOT:PSS film in vacuum under 254 nm ultraviolet light. The mechanism for such an improvement is investigated by current-voltage measurement, X-ray photo electron energy spectrum and atomic force microscopy. A surface degradation and the composition change are found after ultraviolet irradiation. The height of the injection barrier in a hole-only device fabricated with UV-treated PEDOT:PSS film is decreased effectively. Our results reveal that UV treatment is capable of modifying the conductivity and work function of PEDOT:PSS film thus allowing them be tuned to the device application.

Keywords:Physical electronics; conductivity; work function

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