Capacitance Spectroscopy for Quantifying Recombination Losses in Nonfullerene Small-Molecule Bulk Heterojunction Solar Cells

被引：116

作者：

Brus, Viktor V. ^{[1
]}

Proctor, Christopher M. ^{[1
]}

Ran, Niva A. ^{[1
]}

Thuc-Quyen Nguyen ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

来源：

ADVANCED ENERGY MATERIALS | 2016年 / 6卷 / 11期

关键词：

CHARGE-TRANSPORT; NONGEMINATE RECOMBINATION; PHOTOVOLTAIC PERFORMANCE; FILL FACTOR; VOLTAGE; TEMPERATURE; EFFICIENCY;

D O I：

10.1002/aenm.201502250

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 light intensity dependence of the main photoelectrical parameters of the nonfullerene small-molecule bulk heterojunction (BHJ) solar cells p-DTS(FBTTh2)(2):perylene diimide (T1:PDI) shows that the nongeminate recombination losses play an important role in this system. A simple approach for the quantitative analysis of capacitance spectroscopy data of the organic BHJ solar cells, which allows to determine the density of free charge carriers as a function of applied bias under standard working conditions, is demonstrated. Using the proposed capacitance spectroscopic technique, the nongeminate recombination losses in the T1: PDI solar cells are quantitatively characterized in the scope of the bimolecular-and trap-assisted recombination mechanisms. Their contributions are separately analyzed within a wide range of the applied bias.

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页数：8

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