Current transport mechanism of heterojunction diodes based on the reduced graphene oxide-based polymer composite and n-type Si

Jian Huang Lin, Jian Jhou Zeng, Yu Chao Su, Yow Jon Lin

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Abstract

The present work reports the fabrication and detailed electrical properties of heterojunction diodes based on n-type Si and poly(3,4- ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT:PSS) having the reduced graphene oxide (RGO). This heterojunction diode showed a good rectifying behavior with an ideality factor of 1.2. A photocurrent decay model is presented that addresses the charge trapping effect and doping mechanisms for composite PEDOT:PSS films having RGO sheets. The enhanced dark conductivity was observed by incorporating RGO into PEDOT:PSS. For heterojunction diodes, the high photocurrent density originates from efficient hole transport combined with electron trapping with long-second lifetime.

Original languageEnglish
Article number153509
JournalApplied Physics Letters
Volume100
Issue number15
DOIs
Publication statusPublished - 2012 Apr 9

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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