Solution-derived 40 μm vertically aligned ZnO nanowire arrays as photoelectrodes in dye-sensitized solar cells

被引：127

作者：

Qiu, Jijun ^{[1
,2
]}

Li, Xiaomin ^{[1
]}

Zhuge, Fuwei ^{[1
]}

Gan, Xiaoyan ^{[1
]}

Gao, Xiangdong ^{[1
]}

He, Weizhen ^{[3
,4
]}

Park, Se-Jeong ^{[3
,4
]}

Kim, Hyung-Kook ^{[3
,4
]}

Hwang, Yoon-Hwae ^{[3
,4
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Pusan Natl Univ, RCDAMP, Pusan 609735, South Korea

[3] Pusan Natl Univ, Dept Nanomat Engn, Miryang 627706, South Korea

[4] Pusan Natl Univ, BK Nano Fus Technol Div 21, Miryang 627706, South Korea

来源：

NANOTECHNOLOGY | 2010年 / 21卷 / 19期

关键词：

CONVERSION EFFICIENCY; NANOROD ARRAYS; GROWTH; NANOSTRUCTURES; FILMS;

D O I：

10.1088/0957-4484/21/19/195602

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Well-aligned ZnO nanowire arrays with a long length of more than 40 mu m were prepared successfully by using the polyethylenimine (PEI)-assisted preheating hydrothermal method (PAPHT). Several important synthetic parameters such as PEI content, growth time, preheating time and zinc salt concentration were found to determine the growth of ultralong ZnO nanowire arrays, including length, diameter, density and alignment degree. The photoluminescence (PL) spectrum of as-grown ultralong ZnO nanowire arrays revealed a UV emission and a yellow emission, which was attributed to the absorbed hydroxyl group based on the peak shift after annealing in various atmospheres. The performance of dye-sensitized solar cells (DSSCs) increased with increasing length of ZnO nanowire arrays, which was mainly ascribed to the aggrandized photocurrent and reduced recombination loss according to electrochemical impedance spectroscopy (EIS). A maximum efficiency of 1.3% for a cell with a short-circuit current density (J(sc)) = 4.26 mA cm(2), open-circuit voltage (V-oc) = 0.69 V and (fill factor) FF = 0.42 was achieved with a length of 40 mu m.

引用

页数：9

共 31 条

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