| 徐航,李艳,王洪涛,李明雪,韩奎.TiO2基染料敏化太阳能电池的表面修饰及性能研究[J].光电子激光,2017,28(3):243~249 |
| TiO2基染料敏化太阳能电池的表面修饰及性能研究 |
| Study on performance of the dye-sensitized solar cells with surface modificatio n based on TiO2 |
| 投稿时间：2016-04-21 |
| DOI： |
| 中文关键词: TiO2电极 染料敏化太阳能电池(DSSCs) 电化学阻抗谱(EIS) 表面修饰 |
| 英文关键词:TiO2electrode dye-sensitized solar cells (DSSCs) electrochemical impedance spectroscopy (EIS) surface modification |
| 基金项目:中央高校基本科研业务费(N2014QNA56)资助项目 (中国矿业大学 理学院,江苏 徐州 221116) |
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| 中文摘要: |
| 采用水热法制备TiO2浆料,用La(NO3)3溶 液浸泡TiO2薄膜获得修饰电极。用X射线光电子能谱(XPS) 和扫描电子显微镜(SEM)对修饰电极的主要成分及形貌进行表征的结果显示,电极薄膜分为 上下两层,表 面包覆层粒径较大,为La2O3颗粒；下层颗粒粒径较小,为TiO2颗粒。电流-电压测 试结果显示,与修饰 前相比,用La(NO3)3溶液浸泡30min获得的膜电极性能最优,使 开路电压和短路电流分别提高了6.8%和 18.5%。电化学阻抗谱(EIS)测试结果表明,相同偏压下,TiO2/La 2O3电极界面复合电阻比TiO2要大,说明 La2O3包覆层在一定程度上抑制了界面的电子复合,改善了电池的光电化学性能。 |
| 英文摘要: |
| TiO2paste was prepared by hydrothermal method for 5h at 220℃.The modified electrode was obtained by dipping TiO2electrode into 15% La(NO3)3solutio n during different periods of time (15min,30min,45min,60min),followed by sin tering in air at 450℃ for 20min.The main components and morphology of the modified electrode are characterized by X ray photoelectron s pectroscopy (XPS) and scanning electron microscopy (SEM).The current-voltage (I-V) curves are measured using AM1.5G solar simulator and electrochemical workstation (CHI660e) with incident l ight power calibrated to 100mW/cm2.Electrochemical impedance spectroscopy (EIS) characteristics of the dye-sensitized solar cells (DSSCs) are performed with impedance analyzer in a two-electrode configuration in the dark (－0.1～ 1V bias potential,0.01~100kHz frequency,10mV modulation signal).The results show the modified electrode has two layers:the surface coating layer with larger particle size is La2O3and the lower layer with smaller particle size is TiO2.The current-voltage (I-V) curves show that the open circuit voltage and short circuit current of the optimal modified electrode are enhance d by 6.8% and 18.5%,respectively.EIS test results show that the interface recombination resistance of TiO2/La2O3electrode is larger than that of T iO2electrode at the same bias,which indicates that the La2O3coating laye r can inhibit the electron recomb ination at the interface and improve the photoelectric chemical properties of cells. |
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