Improving the photovoltaic performance of Zn2SnO4 solar cells by doping Sr2+/Ba2+ ions: Efficient electron injection and transfer

被引：17
作者：
Dou, Jie [1 ,2 ]
Li, Yafeng [1 ,2 ]
Wu, Junxiu [1 ,2 ]
Chang, Yuan Jay [3 ]
Wei, Mingdeng [1 ,2 ]
机构：
[1] Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Fujian, Peoples R China
[2] Fuzhou Univ, Inst Adv Energy Mat, Fuzhou 350002, Fujian, Peoples R China
[3] Tunghai Univ, Dept Chem, Taichung 40704, Taiwan
来源：
SOLAR ENERGY | 2018年 / 165卷
基金：
中国国家自然科学基金;
关键词：
Photovoltaic performance; Zn2SnO4; Doping; Band gap energy; SEMICONDUCTOR; NANOPARTICLES;
D O I：
10.1016/j.solener.2018.03.012
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In the present study, the nanocrystalline Zn2SO4 dopen with Sr2+/Ba2+ ions is synthesized via a hydrothermal method and their structure is analyzed in detail. Moreover, the photovoltaic properties of dye -sensitized solar cells composed of doped Zn2SnO4 are investigated. The enlarged energy difference between the conduction band edge of Zn2SnO4 and the lowest unoccupied molecular orbit (LUMO) of dye gives rise to the enhanced driving force for electron injection. The DSCs based on Sr2+/Ba2+ doped Zn2SnO4 improve the power efficiency through enhancing charge transport processes and reducing recombination rates. Compared to the photovoltaic conversion efficiency of pure Zn2SnO4 cells, the DSCs based on ZTO-Sr (3.0) exhibit a greater power conversion efficiency of 4.91%. As a consequence, the device of ZTO-Ba (1.5) also demonstrates an improved efficiency of up to 4.94%. This corresponds to an enhancement in power conversion efficiency of 17%, respectively, relative to control devices.
引用
收藏
页码：122 / 130
页数：9
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