Charge transport characteristics in P3HT:PCBM organic blends under illumination: Influence of metal work functions

Yanhui Lou; Zhaokui Wang; Shigeki Naka; Hiroyuki Okada

doi:10.1016/j.cplett.2012.01.057

Charge transport characteristics in P3HT:PCBM organic blends under illumination: Influence of metal work functions

Yanhui Lou, Zhaokui Wang^*, Shigeki Naka, Hiroyuki Okada

^*Corresponding author for this work

Electric and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The authors investigate the effects of metal work functions on charge transport characteristics in P3HT:PCBM bulk heterojunction under illumination by evaluating the temperature dependence of current-voltage characteristics. Schottky thermal emission current plays a dominant role on charge transport in the devices with Au or Al alloys used as electrodes. Whereas, a combined bulk limited conduction mechanism corresponding to three-dimensional variable-range hopping model and space charge limited current (SCLC) with an exponential distribution of traps (filled and unfilled) occurs in the device with Al used as electrode. And a shift to LUMO state of PCBM for trap density distribution is observed due to temperature dependence of Fermi level in PCBM material.

Original language	English
Pages (from-to)	64-68
Number of pages	5
Journal	Chemical Physics Letters
Volume	529
DOIs	https://doi.org/10.1016/j.cplett.2012.01.057
State	Published - 2012/03/09

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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@article{1ae21131b05841c4ae052b29d331a843,

title = "Charge transport characteristics in P3HT:PCBM organic blends under illumination: Influence of metal work functions",

abstract = "The authors investigate the effects of metal work functions on charge transport characteristics in P3HT:PCBM bulk heterojunction under illumination by evaluating the temperature dependence of current-voltage characteristics. Schottky thermal emission current plays a dominant role on charge transport in the devices with Au or Al alloys used as electrodes. Whereas, a combined bulk limited conduction mechanism corresponding to three-dimensional variable-range hopping model and space charge limited current (SCLC) with an exponential distribution of traps (filled and unfilled) occurs in the device with Al used as electrode. And a shift to LUMO state of PCBM for trap density distribution is observed due to temperature dependence of Fermi level in PCBM material.",

author = "Yanhui Lou and Zhaokui Wang and Shigeki Naka and Hiroyuki Okada",

note = "Funding Information: This work is partly supported by regional innovation of R&D projects, overseen by the Ministry of Economy, Trade and Industry (METI), Japan.",

year = "2012",

month = mar,

day = "9",

doi = "10.1016/j.cplett.2012.01.057",

language = "英語",

volume = "529",

pages = "64--68",

journal = "Chemical Physics Letters",

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TY - JOUR

T1 - Charge transport characteristics in P3HT:PCBM organic blends under illumination

T2 - Influence of metal work functions

AU - Lou, Yanhui

AU - Wang, Zhaokui

AU - Naka, Shigeki

AU - Okada, Hiroyuki

N1 - Funding Information: This work is partly supported by regional innovation of R&D projects, overseen by the Ministry of Economy, Trade and Industry (METI), Japan.

PY - 2012/3/9

Y1 - 2012/3/9

N2 - The authors investigate the effects of metal work functions on charge transport characteristics in P3HT:PCBM bulk heterojunction under illumination by evaluating the temperature dependence of current-voltage characteristics. Schottky thermal emission current plays a dominant role on charge transport in the devices with Au or Al alloys used as electrodes. Whereas, a combined bulk limited conduction mechanism corresponding to three-dimensional variable-range hopping model and space charge limited current (SCLC) with an exponential distribution of traps (filled and unfilled) occurs in the device with Al used as electrode. And a shift to LUMO state of PCBM for trap density distribution is observed due to temperature dependence of Fermi level in PCBM material.

AB - The authors investigate the effects of metal work functions on charge transport characteristics in P3HT:PCBM bulk heterojunction under illumination by evaluating the temperature dependence of current-voltage characteristics. Schottky thermal emission current plays a dominant role on charge transport in the devices with Au or Al alloys used as electrodes. Whereas, a combined bulk limited conduction mechanism corresponding to three-dimensional variable-range hopping model and space charge limited current (SCLC) with an exponential distribution of traps (filled and unfilled) occurs in the device with Al used as electrode. And a shift to LUMO state of PCBM for trap density distribution is observed due to temperature dependence of Fermi level in PCBM material.

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U2 - 10.1016/j.cplett.2012.01.057

DO - 10.1016/j.cplett.2012.01.057

M3 - 学術論文

AN - SCOPUS:84862786930

SN - 0009-2614

VL - 529

SP - 64

EP - 68

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Charge transport characteristics in P3HT:PCBM organic blends under illumination: Influence of metal work functions

Abstract

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