Morphology effects on charge generation and recombination dynamics at ZnPc:C60 bulk hetero-junctions using time-resolved terahertz spectroscopy

被引：18

作者：

Bartelt, Andreas F. ^{[1
]}

Strothkaemper, Christian ^{[1
]}

Schindler, Wolfram ^{[1
]}

Fostiropoulos, Konstantinos ^{[1
]}

Eichberger, Rainer ^{[1
]}

机构：

[1] Helmholtz Ctr Berlin Mat & Energy, D-14109 Berlin, Germany

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 14期

关键词：

carrier mobility; electron-hole recombination; fullerenes; organic semiconductors; organic-inorganic hybrid materials; phase separation; photoconductivity; segregation; semiconductor heterojunctions; semiconductor thin films; terahertz wave spectra; time resolved spectra; zinc compounds; CARRIER GENERATION; SEPARATION; DISSOCIATION; FILMS;

D O I：

10.1063/1.3644129

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The influence of growth temperature induced phase segregation and crystallinity in ZnPc:C-60 blend films on the charge generation and recombination dynamics is investigated with optical-pump terahertz-probe spectroscopy. While an ultrafast photo-induced charge generation process is observed for all morphologies, a subsequent sub-nanosecond photoconductivity rise depends on crystallinity and phase segregation. For higher intensities, the signal is dominated by a morphology-dependent bimolecular recombination process. High local mobilities of minimal mu similar to 0.3 cm(2)/Vs are found. The increase of photoconductivity with film growth temperature correlates with formerly observed device photocurrent improvements, (C) 2011 American Institute of Physics [doi:10.1063/1.3644129]

引用

页数：3

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