Universality in the intensity-modulated photocurrent in bulk-heterojunction polymer solar cells

被引：23

作者：

Bag, Monojit ^{[1
]}

Narayan, K. S. ^{[1
]}

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, Bangalore 560064, Karnataka, India

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 07期

关键词：

SPECTROSCOPY; EFFICIENCIES; COPOLYMER; NETWORK;

D O I：

10.1103/PhysRevB.82.075308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We observe a universal feature in the frequency (omega) dependence of intensity-modulated photocurrent I-ph(omega) based on studies of a variety of efficient bulk-heterojunction polymer solar cells. This feature of I-ph(omega) appears in the form of a local maximum in the 5<omega(max)<10 kHz range and is observed to be largely independent of the external parameters such as modulated light intensity (L-ac), wavelength (lambda), temperature (T), and external field over a wide range. Simplistic kinetic models involving carrier generation, recombination, and extraction processes are used to interpret the overall essential features of I-ph(omega) and correlate it to the device parameters.

引用

页数：6

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