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Title: Enhanced charge extraction in inverted hybrid photovoltaic cells assisted by graphene nanoflakes
Authors: 國立臺灣師範大學化學系
Y.-M. Sung
F.-C. Hsu
D.-Y. Wang
I.-S. Wang
Chia-Chun Chen
H.-C. Liao
W.-F. Su
Y.-F. Chen
Issue Date: 21-Nov-2011
Publisher: Royal Society of Chemistry
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 C61butyric 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%.
ISSN: 0959-9428
Other Identifiers: ntnulib_tp_C0301_01_079
Appears in Collections:教師著作

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