An Unconventional Route to High-Efficiency Dye-Sensitized Solar Cells via Embedding Graphitic Thin Films into TiO2 Nanoparticle Photoanode

被引：144

作者：

Jang, Yoon Hee ^{[2
]}

Xin, Xukai ^{[1
,3
]}

Byun, Myunghwan ^{[3
]}

Jang, Yu Jin ^{[2
]}

Lin, Zhiqun ^{[1
,3
]}

Kim, Dong Ha ^{[2
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Ewha Womans Univ, Dept Chem & Nano Sci, Seoul 120750, South Korea

[3] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

NANO LETTERS | 2012年 / 12卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Carbon/TiO2 thin film; dye-sensitized solar cells; block copolymer template; direct carbonization; POWER-CONVERSION EFFICIENCY; ENERGY-CONVERSION; NANOTUBE ARRAYS; LOW-COST; PERFORMANCE; FABRICATION; PHOTOCURRENT; IMPROVEMENT; ELECTRODES; MORPHOLOGY;

D O I：

10.1021/nl203901m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Graphitic thin films embedded with highly dispersed titanium dioxide (TiO2) nanoparticles were incorporated for the first time into the conventional dye-sensitized solar cells (DSSCs), resulting in a remarkably improved cell efficiency due to its superior electron conductivity. Massively ordered arrays of TiO2 dots embedded in carbon matrix were fabricated via UV-stabilization of polystyrene-block-poly(4-vinylpyridine) films containing TiO2 precursors followed by direct carbonization. For dye-sensitized TiO2 based solar cells containing carbon/TiO2 thin layers at both sides of pristine TiO2 layer, an increase of 40.6% in overall power conversion efficiency was achieved compared with neat TiO2-based DSSCs. Such a remarkably improved cell efficiency was ascribed to the superior electron conductivity and extended electron lifetime elucidated by cyclic voltamrnetry and impedance spectroscopy.

引用

页码：479 / 485

页数：7

共 59 条

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