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
收藏
页码：217 / 222
页数：6
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