Highly Efficient Zn-Cu-In-Se Quantum Dot-Sensitized Solar Cells through Surface Capping with Ascorbic Acid

被引：61

作者：

Zhang, Hua ^{[1
]}

Fang, Wenjuan ^{[1
]}

Wang, Wenran ^{[1
]}

Qian, Nisheng ^{[1
]}

Ji, Xiaohe ^{[1
]}

机构：

[1] East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2019年 / 11卷 / 07期

关键词：

ascorbic acid; capping ligand; quaternary semiconductor; high efficiency; quantum dot-sensitized solar cells; CONVERSION EFFICIENCY; COUNTER ELECTRODE; NANOCRYSTALS; CUINSE2; DYE; RECOMBINATION; PERFORMANCE; STRATEGY; TERNARY;

D O I：

10.1021/acsami.8b18033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The balance between band structure, composition, and defect is essential for improving the optoelectronic properties of ternary and quaternary quantum dots and the corresponding photovoltaic performance. In this work, ascorbic acid (AA) as capping ligand is introduced into the reaction system to prepare green Zn-Cu-In-Se (ZCISe) quantum dots. Results show that the addition of AA can increase the Zn content while decrease the In content, resulting in enlarged band gap, high conduction band energy level, and suppressed charge recombination. When AA/Cu ratio is 1, the quantum dots possess the largest band gap of 1.49 eV and the assembled quantum dot-sensitized solar cells exhibit superior photovoltaic performance with similar to 17% increment mainly contributed by the dramatically increased current density. The new record efficiencies of 10.44 and 13.85% are obtained from the ZCISe cells assembled with brass and titanium mesh-based counter electrodes, respectively.

引用

页码：6927 / 6936

页数：10

共 46 条

[1] Synthesis of CdSeS nanocrystals in coordinating and noncoordinating solvents: Solvent's role in evolution of the optical and structural properties [J].