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

Viktor V. Brus; Christopher M. Proctor; Niva A. Ran; Thuc Quyen Nguyen

doi:10.1002/aenm.201502250

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

Viktor V. Brus, Christopher M. Proctor, Niva A. Ran, Thuc Quyen Nguyen

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

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.

Original language	English
Article number	1502250
Journal	Advanced Energy Materials
Volume	6
Issue number	11
DOIs	https://doi.org/10.1002/aenm.201502250
Publication status	Published - Jun 8 2016
Externally published	Yes

Keywords

bulk heterojunction solar cells
capacitance
charge-carrier recombination
impedance

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Materials Science(all)

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title = "Capacitance Spectroscopy for Quantifying Recombination Losses in Nonfullerene Small-Molecule Bulk Heterojunction Solar Cells",

abstract = "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.",

keywords = "bulk heterojunction solar cells, capacitance, charge-carrier recombination, impedance",

author = "Brus, {Viktor V.} and Proctor, {Christopher M.} and Ran, {Niva A.} and Nguyen, {Thuc Quyen}",

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AU - Brus, Viktor V.

AU - Proctor, Christopher M.

AU - Ran, Niva A.

AU - Nguyen, Thuc Quyen

PY - 2016/6/8

Y1 - 2016/6/8

N2 - 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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KW - bulk heterojunction solar cells

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KW - charge-carrier recombination

KW - impedance

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