锂掺杂二氧化钛致密层对染料敏化太阳电池性能的影响

doi:10.3724/SP.J.1077.2011.00819

无机材料学报 ›› 2011, Vol. 26 ›› Issue (8): 819-822.DOI: 10.3724/SP.J.1077.2011.00819

锂掺杂二氧化钛致密层对染料敏化太阳电池性能的影响

周文谦, 鲁玉明, 陈昌兆, 刘志勇, 蔡传兵

(上海大学理学院, 物理系, 上海 200444)

收稿日期:2010-10-19 修回日期:2010-12-01 出版日期:2011-08-20 网络出版日期:2011-07-14
作者简介:周文谦(1982-), 男, 硕士研究生.
基金资助:
国家自然科学基金(10774098, 50702033); 上海市科委项目(0752nm017, 08521101502); 上海市重点学科项目(S30105)

Effect of Li-doped TiO₂ Compact Layers for Dye Sensitized Solar Cells

ZHOU Wen-Qian, LU Yu-Ming, CHEN Chang-Zhao, LIU Zhi-Yong, CAI Chuan-Bing

(Department of Physics, Shanghai University, Shanghai 200444, China)

Received:2010-10-19 Revised:2010-12-01 Published:2011-08-20 Online:2011-07-14
Supported by:
National Natural Science Foundation of China (10774098, 50702033); Fund of Science and Technology Commission of Shanghai (0752nm017, 08521101502); Shanghai Leading Academic Discipline Project (S30105)

摘要/Abstract

摘要： 利用脉冲激光沉积(PLD), 在纳米多孔二氧化钛层(np-TiO₂)与透明导电玻璃之间分别沉积了二氧化钛致密层(d-TiO₂)和掺锂二氧化钛致密层(d-Li-TiO₂), XRD衍射结果显示该致密层具有锐钛矿结构. 电池开路电压随时间的衰减实验结果表明, 该结构可以有效减慢开路电压的衰减, 抑制透明导电玻璃上的电子向电解质逆向传输并进行电子复合的几率; 同时, 掺入锂后, 致密TiO₂层(d-TiO₂)能带宽度变窄, 降低了np-TiO₂层与透明导电玻璃之间的界面电阻, 使得np-TiO₂层导带上的光生电子更容易地向透明导电玻璃传输, 进而使得具有d-Li-TiO₂层的染料敏化太阳电池比无致密层的染料敏化太阳电池光电转换效率提高了42%.

关键词: 染料敏化太阳能电池, 掺锂二氧化钛, 致密层, 界面电阻

Abstract: Both TiO₂ compact layer (d-TiO₂) and Li-doped TiO₂compact layer (d-Li-TiO₂) were deposited between nano-TiO₂ and transparent conductive oxide (TCO) for dye sensitized solar cells (DSSC) by the technique of pulsed laser deposition (PLD). XRD pattern shows the compact layers are crystallized in anatase structure. Compared with FTO-based DSSC without compact layer, the open voltage decay measurement shows the novel structure can slow the decay of the open circuit voltage, indicating an effective suppression of back electrons transfer from TCO to the electrolyte by the dense buffer layers. In addition, the interface resistance between the nano-TiO₂ and the TCO falls down due to the reduced energy band-gap of Li-doped TiO₂, which makes it easier to transfer the generated electrons from conducting band of nano-TiO₂to TCO surface, leading an enlarged short current from 4.2 mA/cm²of FTO-based to 4.8 mA/cm² for that with d-TiO₂ and 6.1 mA/cm² for d-Li-TiO₂, respectively. Thus, the photovoltaic energy conversion efficiency of DSSC based on the Li-doped TiO₂ compact layer enhances as much as 42% compared with that FTO-based DSSC without TiO₂compact layer.

Key words: dye-sensitized solar cell, Li-doped TiO2, compact layer, interface resistance

中图分类号:

O474

周文谦, 鲁玉明, 陈昌兆, 刘志勇, 蔡传兵. 锂掺杂二氧化钛致密层对染料敏化太阳电池性能的影响[J]. 无机材料学报, 2011, 26(8): 819-822.

ZHOU Wen-Qian, LU Yu-Ming, CHEN Chang-Zhao, LIU Zhi-Yong, CAI Chuan-Bing. Effect of Li-doped TiO₂ Compact Layers for Dye Sensitized Solar Cells[J]. Journal of Inorganic Materials, 2011, 26(8): 819-822.

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锂掺杂二氧化钛致密层对染料敏化太阳电池性能的影响

Effect of Li-doped TiO₂ Compact Layers for Dye Sensitized Solar Cells

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锂掺杂二氧化钛致密层对染料敏化太阳电池性能的影响

Effect of Li-doped TiO2 Compact Layers for Dye Sensitized Solar Cells

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Effect of Li-doped TiO₂ Compact Layers for Dye Sensitized Solar Cells