Charge Transfer at Organic/Inorganic Interfaces and the Formation of Space Charge Regions Studied with Infrared Light

被引：14

作者：

Beck, Sebastian ^{[1
,2
]}

Gerbert, David ^{[1
,2
]}

Glaser, Tobias ^{[1
,2
]}

Pucci, Annemarie ^{[1
,2
]}

机构：

[1] Heidelberg Univ, Kirchhoff Inst Phys, D-69120 Heidelberg, Germany

[2] InnovationLab GmbH, D-69115 Heidelberg, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2015年 / 119卷 / 22期

关键词：

ENERGY-LEVEL ALIGNMENT; TRANSITION-METAL OXIDES; MOO3; EFFICIENCY; MOLECULES;

D O I：

10.1021/acs.jpcc.5b04398

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We present in situ infrared spectroscopy as a powerful tool for the qualitative and quantitative analysis of the charge transfer through the prototypical interface between the organic semiconductor 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP) and MoO3 that in organic electronic devices is often used to improve their performance. Due to the different infrared vibrational spectra, charged and neutral species of CBP molecules can be well distinguished, which allows the measurement of the amount of charged species in the vicinity of the interface. The quantitative analysis of CBP thickness-dependent infrared transmission spectra delivered the extension of the space charge region from the interface into the CBP on a nanometer scale. The clear influence of the deposition sequence on these interface properties was clarified by further studies of the inverted layer structures.

引用

页码：12545 / 12550

页数：6

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