Tuning acceptor energy level for efficient charge collection in copper-phthalocyanine-based organic solar cells

Chih Wei Chu; Vishal Shrotriya; Gang Li; Yang Yang

doi:10.1063/1.2194207

Tuning acceptor energy level for efficient charge collection in copper-phthalocyanine-based organic solar cells

Chih Wei Chu, Vishal Shrotriya, Gang Li, Yang Yang

Research output: Journal article publication › Journal article › Academic research › peer-review

137 Citations (Scopus)

Abstract

We compare organic donor/acceptor heterojunction photovoltaic devices based on copper phthalocyanine (CuPc) as the donor and [6,6]-phenyl C60 butyric acid methyl ester (PCBM) or buckminsterfullerene (C60) as the acceptor. The effect of the two acceptors on open-circuit voltage and short-circuit current density is studied. Improved interface properties, optimal energy level matching, and more balanced charge transport are believed to be the reasons for better performance of CuPc/PCBM heterojunction device, in terms of photocurrent and fill factor. The energy conversion efficiency of the devices under AM1.5G solar illumination at 130 mW cm2 is improved to 1.18%, up from 0.74%.

Original language	English
Article number	153504
Journal	Applied Physics Letters
Volume	88
Issue number	15
DOIs	https://doi.org/10.1063/1.2194207
Publication status	Published - 10 Apr 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2194207

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abstract = "We compare organic donor/acceptor heterojunction photovoltaic devices based on copper phthalocyanine (CuPc) as the donor and [6,6]-phenyl C60 butyric acid methyl ester (PCBM) or buckminsterfullerene (C60) as the acceptor. The effect of the two acceptors on open-circuit voltage and short-circuit current density is studied. Improved interface properties, optimal energy level matching, and more balanced charge transport are believed to be the reasons for better performance of CuPc/PCBM heterojunction device, in terms of photocurrent and fill factor. The energy conversion efficiency of the devices under AM1.5G solar illumination at 130 mW cm2 is improved to 1.18%, up from 0.74%.",

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AB - We compare organic donor/acceptor heterojunction photovoltaic devices based on copper phthalocyanine (CuPc) as the donor and [6,6]-phenyl C60 butyric acid methyl ester (PCBM) or buckminsterfullerene (C60) as the acceptor. The effect of the two acceptors on open-circuit voltage and short-circuit current density is studied. Improved interface properties, optimal energy level matching, and more balanced charge transport are believed to be the reasons for better performance of CuPc/PCBM heterojunction device, in terms of photocurrent and fill factor. The energy conversion efficiency of the devices under AM1.5G solar illumination at 130 mW cm2 is improved to 1.18%, up from 0.74%.

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Tuning acceptor energy level for efficient charge collection in copper-phthalocyanine-based organic solar cells

Abstract

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