Influence of ionization energy change on valence band offset in organic p-n junction

被引：8

作者：

Akaike, Kouki ^{[1
]}

Kanai, Kaname ^{[2
]}

Ouchi, Yukio ^{[1
]}

Seki, Kazuhiko ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Sci, Dept Chem, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[2] Okayama Univ, Okayama 7008530, Japan

来源：

APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 11期

关键词：

POLYMER SOLAR-CELLS; FIELD-EFFECT TRANSISTORS; HETEROJUNCTIONS; INTERFACES;

D O I：

10.1063/1.3231926

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Valence band offsets at [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM)/metallophthalocyanine (MPc, M=Cu and Zn) interfaces have been investigated with ultraviolet photoelectron spectroscopy, which are organic p-n junctions in organic photovoltaics. The highest occupied molecular orbitals of MPcs rise toward the interface, while that of PCBM lowers. This behavior implies that the different energy band offsets from inorganic p-n junction are realized in organic p-n junction. The depletion layers were not observed at the interfaces. Such anomalous energy band offsets are attributed to the interfacial dipole and also ionization energy changes of MPcs and PCBM at the interface. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3231926]

引用

页数：3

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