Investigation on Photocurrent Polarity of a Bulk Heterojunction Organic Photovoltaic Device Using a Ferroelectric Thin Film

被引：2

作者：

Li Bo ^{[1
]}

机构：

[1] Zhejiang Univ Technol, Coll Sci, Dept Appl Phys, Hangzhou 310023, Zhejiang, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2012年 / 28卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Ferroelectric thin film; Organics; Photovoltaic device; Bulk heterojunction; Transient photocurrent; Lead magnesium niobate-lead titanate; Polarity; POLYMER SOLAR-CELLS; GEL PROCESS; EFFICIENCY; PERFORMANCE; MOLECULE; SYSTEM; LAYER;

D O I：

10.3866/PKU.WHXB201111111

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：

The ferroelectric thin film of lead magnesium niobate-lead titanate (PMN-PT) was fabricated and characterized using UV-Vis transmission spectroscopy, X-ray diffraction (XRD), and atomic force microscopy (AFM). To determine the photocurrent properties of the bulk heterojunction organic blend film a photovoltaic device with the structure of tin indium oxide (ITO)/PMN-PT/organic blend film/aluminum (Al) was fabricated. Under modulated laser irradiation the amplitude and polarity of the transient photocurrent varied with the bias voltage, which shows that the photocurrent polarity of a conventional bulk heterojunction organic photovoltaic device is determined by the internal electric field that is induced by the difference between the work function of the anode and cathode electrodes. A new method is proposed for investigating the photocurrent properties of bulk heterojunction organic photovoltaic devices.

引用

页码：217 / 222

页数：6

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