Increased work function in PEDOT:PSS film under ultraviolet irradiation

Xing Ying-Jie
Qian Min-Fang
Guo Deng-Zhu
Zhang Geng-Min

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Publication date

January 2014

DOI

10.1088/1674-1056/23/3/038504

Publisher

chinese physics b

ISSN

1674-1056

Journal

issn:1674-1056

Citation count (estimate)

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 exp...

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Increased work function in PEDOT:PSS film under ultraviolet irradiation

Abstract

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Increased work function in PEDOT:PSS film under ultraviolet irradiation

Abstract

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