Enhanced charge extraction in inverted hybrid photovoltaic cells assisted by graphene nanoflakes

Yun Ming Sung; Fang Chi Hsu; Di Yan Wang; I. Sheng Wang; Chia Chun Chen; Hsueh Chung Liao; Wei Fang Su; Yang Fang Chen

doi:10.1039/c1jm12571k

Enhanced charge extraction in inverted hybrid photovoltaic cells assisted by graphene nanoflakes

Yun Ming Sung, Fang Chi Hsu^*, Di Yan Wang, I. Sheng Wang, Chia Chun Chen, Hsueh Chung Liao, Wei Fang Su, Yang Fang Chen

^*Corresponding author for this work

Department of Chemistry

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

18 Citations (Scopus)

Abstract

We use graphene nanoflakes (GNFs) to greatly enhance the charge extraction out of a photoactive blend in inverted hybrid poly(3-hexylthiophene):(6,6)- phenyl C₆₁ butyric acid methyl ester (P3HT:PCBM)/ZnO-nanorod photovoltaic cells. Instead of a continuous film, solution processed GNFs with dimensions less than 200 nm × 200 nm are homogeneously scattered on top of the well-aligned ZnO-nanorods. Those GNFs play key roles, they serve as an electron drain to collect electron flow out to ZnO-nanorods, enhance the carrier mobility of the device and promote holes to drift toward the surface in contact with the cathode. As a result, there is a large enhancement in photocurrent and photovoltage of 35% and 27%, respectively, leading to an improved cell efficiency by up to about 100%.

Original language	English
Pages (from-to)	17462-17467
Number of pages	6
Journal	Journal of Materials Chemistry
Volume	21
Issue number	43
DOIs	https://doi.org/10.1039/c1jm12571k
Publication status	Published - 2011 Nov 21

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Enhanced charge extraction in inverted hybrid photovoltaic cells assisted by graphene nanoflakes",

abstract = "We use graphene nanoflakes (GNFs) to greatly enhance the charge extraction out of a photoactive blend in inverted hybrid poly(3-hexylthiophene):(6,6)- phenyl C61 butyric acid methyl ester (P3HT:PCBM)/ZnO-nanorod photovoltaic cells. Instead of a continuous film, solution processed GNFs with dimensions less than 200 nm × 200 nm are homogeneously scattered on top of the well-aligned ZnO-nanorods. Those GNFs play key roles, they serve as an electron drain to collect electron flow out to ZnO-nanorods, enhance the carrier mobility of the device and promote holes to drift toward the surface in contact with the cathode. As a result, there is a large enhancement in photocurrent and photovoltage of 35% and 27%, respectively, leading to an improved cell efficiency by up to about 100%.",

author = "Sung, {Yun Ming} and Hsu, {Fang Chi} and Wang, {Di Yan} and Wang, {I. Sheng} and Chen, {Chia Chun} and Liao, {Hsueh Chung} and Su, {Wei Fang} and Chen, {Yang Fang}",

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doi = "10.1039/c1jm12571k",

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T1 - Enhanced charge extraction in inverted hybrid photovoltaic cells assisted by graphene nanoflakes

AU - Sung, Yun Ming

AU - Hsu, Fang Chi

AU - Wang, Di Yan

AU - Wang, I. Sheng

AU - Chen, Chia Chun

AU - Liao, Hsueh Chung

AU - Su, Wei Fang

AU - Chen, Yang Fang

PY - 2011/11/21

Y1 - 2011/11/21

N2 - We use graphene nanoflakes (GNFs) to greatly enhance the charge extraction out of a photoactive blend in inverted hybrid poly(3-hexylthiophene):(6,6)- phenyl C61 butyric acid methyl ester (P3HT:PCBM)/ZnO-nanorod photovoltaic cells. Instead of a continuous film, solution processed GNFs with dimensions less than 200 nm × 200 nm are homogeneously scattered on top of the well-aligned ZnO-nanorods. Those GNFs play key roles, they serve as an electron drain to collect electron flow out to ZnO-nanorods, enhance the carrier mobility of the device and promote holes to drift toward the surface in contact with the cathode. As a result, there is a large enhancement in photocurrent and photovoltage of 35% and 27%, respectively, leading to an improved cell efficiency by up to about 100%.

AB - We use graphene nanoflakes (GNFs) to greatly enhance the charge extraction out of a photoactive blend in inverted hybrid poly(3-hexylthiophene):(6,6)- phenyl C61 butyric acid methyl ester (P3HT:PCBM)/ZnO-nanorod photovoltaic cells. Instead of a continuous film, solution processed GNFs with dimensions less than 200 nm × 200 nm are homogeneously scattered on top of the well-aligned ZnO-nanorods. Those GNFs play key roles, they serve as an electron drain to collect electron flow out to ZnO-nanorods, enhance the carrier mobility of the device and promote holes to drift toward the surface in contact with the cathode. As a result, there is a large enhancement in photocurrent and photovoltage of 35% and 27%, respectively, leading to an improved cell efficiency by up to about 100%.

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Enhanced charge extraction in inverted hybrid photovoltaic cells assisted by graphene nanoflakes

Abstract

ASJC Scopus subject areas

UN SDGs

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