Charge depletion in organic heterojunction

被引：14

作者：

Ng, T. W. ^{[1
]}

Lo, M. F.

Lee, S. T.

Lee, C. S.

机构：

[1] City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 11期

关键词：

COPPER PHTHALOCYANINE; HOLE-INJECTION; INTERFACES; EFFICIENCY; DIPOLE; METAL;

D O I：

10.1063/1.3693608

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Until now two types of organic-organic heterojunction (OHJ) have been observed in P-N junctions formed between undoped-organic semiconductors. Charge-transfers across OHJs are either negligible or showing electron transfer from P-type to N-type materials, leading to charges accumulation near the interface. Here, we observed that junction of 4,4',4 ''-tris(2-methylphenyl-phenylamino) triphenylamine (m-MTDATA)/bathocuproine (BCP) show the third-behavior. Electrons in BCP (N-type) transfer to m-MTDATA (P-type), leading to depletion of mobile majority carriers near the junction. While "depletion junctions" are typical in inorganic semiconductors, there are no reports in undoped-OHJ. Formation mechanism of depletion OHjs and fundamental differences between inorganic and organic HJs are discussed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3693608]

引用

页数：3

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