Increased work function in PEDOT：PSS film under ultraviolet irradiation

doi:10.1088/1674-1056/23/3/038504

中国物理B ›› 2014, Vol. 23 ›› Issue (3): 38504-038504.doi: 10.1088/1674-1056/23/3/038504

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇下一篇

Increased work function in PEDOT：PSS film under ultraviolet irradiation

邢英杰, 钱旻昉, 郭等柱, 张耿民

Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China

收稿日期:2013-07-22 修回日期:2013-10-29 出版日期:2014-03-15 发布日期:2014-03-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61076057, 61376059, 61171023, and 91221202,) and the National Basic Research Program of China (Grant Nos. 2012CB932701 and 2011CB933001).

Increased work function in PEDOT：PSS film under ultraviolet irradiation

Xing Ying-Jie (邢英杰), Qian Min-Fang (钱旻昉), Guo Deng-Zhu (郭等柱), Zhang Geng-Min (张耿民)

Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China

Received:2013-07-22 Revised:2013-10-29 Online:2014-03-15 Published:2014-03-15
Contact: Xing Ying-Jie E-mail:xingyj@pku.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61076057, 61376059, 61171023, and 91221202,) and the National Basic Research Program of China (Grant Nos. 2012CB932701 and 2011CB933001).

摘要/Abstract

摘要： An increase of work function (0.3 eV) is achieved by irradiating poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film in vacuum with 254-nm ultraviolet (UV) light. The mechanism for such an improvement is investigated by photoelectron yield spectroscopy, X-ray photo electron energy spectrum, and field emission technique. Surface oxidation and composition change are found as the reasons for work function increase. The UV-treated PEDOT:PSS film is used as the hole injection layer in a hole-only device. Hole injection is improved by UV-treated PEDOT:PSS film without baring the enlargement of film resistance. Our result demonstrates that UV treatment is more suitable for modifying the injection barrier than UV ozone exposure.

关键词: poly(3, 4-ethylenedioxythiophene)：poly(styrene sulfonate) (PEDOT：PSS) film, work function, ultraviolet, hole injection layer

Abstract: An increase of work function (0.3 eV) is achieved by irradiating poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film in vacuum with 254-nm ultraviolet (UV) light. The mechanism for such an improvement is investigated by photoelectron yield spectroscopy, X-ray photo electron energy spectrum, and field emission technique. Surface oxidation and composition change are found as the reasons for work function increase. The UV-treated PEDOT:PSS film is used as the hole injection layer in a hole-only device. Hole injection is improved by UV-treated PEDOT:PSS film without baring the enlargement of film resistance. Our result demonstrates that UV treatment is more suitable for modifying the injection barrier than UV ozone exposure.

Key words: poly(3,4-ethylenedioxythiophene)：poly(styrene sulfonate) (PEDOT：PSS) film, work function, ultraviolet, hole injection layer

中图分类号: (Surface barrier, boundary, and point contact devices)

85.30.Hi

81.65.Cf (Surface cleaning, etching, patterning)

邢英杰, 钱旻昉, 郭等柱, 张耿民. Increased work function in PEDOT：PSS film under ultraviolet irradiation[J]. 中国物理B, 2014, 23(3): 38504-038504.

Xing Ying-Jie (邢英杰), Qian Min-Fang (钱旻昉), Guo Deng-Zhu (郭等柱), Zhang Geng-Min (张耿民). Increased work function in PEDOT：PSS film under ultraviolet irradiation[J]. Chin. Phys. B, 2014, 23(3): 38504-038504.

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Increased work function in PEDOT：PSS film under ultraviolet irradiation

Increased work function in PEDOT：PSS film under ultraviolet irradiation

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