简易合成Cu2SnSe3作染料敏化太阳能电池对电极

doi:10.3866/PKU.WHXB201309031

物理化学学报 >> 2013, Vol. 29 >> Issue (11): 2339-2344.doi: 10.3866/PKU.WHXB201309031

简易合成Cu₂SnSe₃作染料敏化太阳能电池对电极

朱磊^1,2, 强颖怀¹, 赵宇龙¹, 顾修全¹, 宋端鸣¹, 宋昌斌¹

1 中国矿业大学材料科学与工程学院, 江苏徐州 221116;
2 中国矿业大学化工学院, 江苏徐州 221116

收稿日期:2013-05-15 修回日期:2013-09-02 发布日期:2013-10-30
通讯作者: 强颖怀 E-mail:yhqiang@cumt.edu.cn
基金资助:
中央高校基本科研基金(2592012184)和江苏高校优势学科建设工程资助项目

Facile Synthesis of Cu₂SnSe₃ as Counter Electrodes for Dye-Sensitized Solar Cells

ZHU Lei^1,2, QIANG Ying-Huai¹, ZHAO Yu-Long¹, GU Xiu-Quan¹, SONG Duan-Ming¹, SONG Chang-Bin¹

1 School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China;
2 School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, P. R. China

Received:2013-05-15 Revised:2013-09-02 Published:2013-10-30
Contact: QIANG Ying-Huai E-mail:yhqiang@cumt.edu.cn
Supported by:
The project was supported by the Fundamental Research Funds for the Central Universities, China (2592012184) and Fund of the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

摘要/Abstract

摘要：

采用简易溶剂热法合成直径为150-250nm的Cu₂SnSe₃纳米颗粒.以Cu₂SnSe₃"墨水"为前驱体采用滴落涂布法在掺氟二氧化锡基板上沉积Cu₂SnSe₃薄膜作为染料敏化太阳能电池(DSSC)对电极.利用场发射扫描电镜(FESEM)、透射电镜(TEM)、X射线衍射(XRD)、拉曼光谱(Raman)、能谱仪(EDS)等对Cu₂SnSe₃纳米颗粒的形貌、结构和组成进行表征.结果表明:产物纯净无杂项且符合化学计量比.以Cu₂SnSe₃为对电极的DSSC转化效率为7.75%,与铂对电极DSSC效率相当(7.21%).研究表明,DSSC的光电流密度和影响因子与Cu₂SnSe₃薄膜厚度密切相关,这是由于不同厚度的Cu₂SnSe₃薄膜作对电极所对应的催化位置数目和电阻值不同.电化学阻抗谱研究说明,Cu₂SnSe₃因具有类似铂良好的电催化性能而适合用作染料敏化太阳能电池对电极材料.本文以Cu₂SnSe₃代替贵金属铂,提供了一种廉价制备高效染料敏化太阳能电池对电极的新方法.

关键词: Cu₂SnSe₃, 纳米颗粒, 溶剂热, 对电极, 染料敏化太阳能电池

Abstract:

Cu₂SnSe₃ (CTSe) nanoparticles with diameters of 150-250 nm were synthesized by a facile solvothermal method. The nanoparticles drop-casted onto fluorine dope tin oxide (FTO) substrate were used as counter electrode in dye-sensitized solar cells (DSSCs). The morphology, structure and composition of the CTSe nanoparticles were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and energy dispersive X-ray spectroscopy (EDS). The results indicated the formation of the nanoparticles with a single crystal phase and approximately stoichiometric composition. DSSCs fabricated with the CTSe-based counter electrodes exhibited a power conversion efficiency of 7.75%, which is similar to that of Ptbased devices (7.21%). The current-voltage curves of the DSSCs demonstrated that the thickness of the CTSe layer strongly influenced the photocurrent density and fill factor as a result of changes in the number of electrocatalytic sites and the resistance of the layers. Electrochemical impedance spectroscopy (EIS) measurements were performed and the results indicated that CTSe exhibited Pt-like electrocatalytic activity for the reduction of I₃^- to I^- in DSSCs. This work presents a new approach for expanding the possibilities for developing low-cost DSSCs that do not require expensive and rare Pt counter electrodes.

Key words: Cu₂SnSe₃, Nanoparticle, Solvothermal, Counter electrode, Dye-sensitized solar cell

MSC2000:

O649

朱磊, 强颖怀, 赵宇龙, 顾修全, 宋端鸣, 宋昌斌. 简易合成Cu₂SnSe₃作染料敏化太阳能电池对电极[J]. 物理化学学报, 2013, 29(11): 2339-2344.

ZHU Lei, QIANG Ying-Huai, ZHAO Yu-Long, GU Xiu-Quan, SONG Duan-Ming, SONG Chang-Bin. Facile Synthesis of Cu₂SnSe₃ as Counter Electrodes for Dye-Sensitized Solar Cells[J]. Acta Phys. -Chim. Sin., 2013, 29(11): 2339-2344.

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简易合成Cu₂SnSe₃作染料敏化太阳能电池对电极

Facile Synthesis of Cu₂SnSe₃ as Counter Electrodes for Dye-Sensitized Solar Cells

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