Improved photoinduced charge carriers separation in organic-inorganic hybrid photovoltaic devices

被引：95

作者：

Vaynzof, Yana ^{[1
]}

Kabra, Dinesh ^{[1
]}

Zhao, Lihong ^{[2
]}

Ho, Peter K. H. ^{[2
]}

Wee, Andrew T. -S. ^{[2
]}

Friend, Richard H. ^{[1
,2
]}

机构：

[1] Cavendish Lab, Cambridge CB3 0HE, England

[2] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

II-VI semiconductors; monolayers; organic semiconductors; photoelectron spectra; photovoltaic cells; self-assembly; semiconductor thin films; ultraviolet spectra; wide band gap semiconductors; work function; zinc compounds; SOLAR-CELLS; FILMS; POLYMER; FULLERENE;

D O I：

10.1063/1.3464973

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate enhanced performance of a hybrid photovoltaic device, where poly[3-hexylthiophene] (P3HT) is used as active material and a solution-processed thin flat film of ZnO modified by a self-assembled monolayer (SAM) of phenyl-C61-butyric acid (PCBA) is used as electron extracting electrode. Ultraviolet photoemission spectroscopy measurements reveal an increase in the substrate work function from 3.6 to 4.1 eV upon PCBA SAM deposition due to an interfacial dipole pointing away from the ZnO. External quantum efficiency (EQE) of the SAM modified devices reached 9%, greatly improved over the 3% EQE of the unmodified devices. This corresponds to full charge separation of all photoexcitations generated in the P3HT within an exciton diffusion range from the interface. (C) 2010 American Institute of Physics. [doi:10.1063/1.3464973]

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页数：3

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