title: Inverted heterojunction solar cells incorporating fullerene/polythiophene composite core/shell nanorod arrays.
abstract: We have fabricated inverted heterojunction solar cell devices incorporating [6,6]-phenyl-C(61)-butyric acid methyl ester/poly(3-hexylthiophene) core/shell nanorod arrays by using an anodic alumina oxide template. The internal quantum efficiencies and external quantum efficiencies of these core/shell nanorod inverted solar cells were higher than those of the corresponding conventional inverted bulk heterojunction device. The optimized nanorod array structure had a high hole mobility that was over one order magnitude greater than that of the conventional bulk heterojunction structure, as determined by fitting the dark J-V curves into the space charge limited current model. The more efficient carrier transport of the device incorporating the core/shell nanorod arrays provided it with both a higher short-circuit current density and power conversion efficiency.
authors.affiliation: Department of Materials Science and Engineering, National Chiao Tung University, Taiwan, Republic of China.
authors.forename: Hsu-Shen
authors.initials: HS
authors.lastname: Wang
authors.forename: Shih-Yung
authors.initials: SY
authors.lastname: Chen
authors.forename: Ming-Hsin
authors.initials: MH
authors.lastname: Su
authors.forename: Yuh-Lin
authors.initials: YL
authors.lastname: Wang
authors.forename: Kung-Hwa
authors.initials: KH
authors.lastname: Wei