Tailored near-infrared-emitting colloidal heterostructured quantum dots with enhanced visible light absorption for high performance photoelectrochemical cells

被引：34
作者：
Channa, Ali Imran [1 ]
Tong, Xin [1 ]
Xu, Jing-Yin [1 ]
Liu, Yongchen [1 ]
Wang, Changmeng [1 ]
Sial, Muhammad Naeem [1 ]
Yu, Peng [1 ]
Ji, Haining [2 ]
Niu, Xiaobin [2 ]
Wang, Zhiming M. [1 ]
机构：
[1] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Mat & Energy, State Key Lab Elect Thin Film & Integrated Device, Hefei, Anhui, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2019年 / 7卷 / 17期
基金：
中国国家自然科学基金;
关键词：
OPTICAL-PROPERTIES; SOLAR-CELLS; THIN-FILMS; EFFICIENT; PHOTOANODE; CDS; NANOCRYSTALS;
D O I：
10.1039/c9ta01052a
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Colloidal heterostructured CuGaS2 (CGS)/CdS core/shell quantum dots (QDs) with a wurtzite (WZ) phase were synthesized via a facile two-step technique. As compared to the bare CGS QDs, the optical properties of such heterostructured CGS/CdS core/shell QDs were tailored to show largely enhanced light absorption in the visible range and an emission peak in the near-infrared (NIR) region at a wavelength of similar to 816 nm. As proof of concept, these core/shell QDs were used as light absorbers to fabricate a photoelectrochemical (PEC) cell, which exhibited a maximum saturated photocurrent density of similar to 6.5 mA cm(-2) and outstanding stability under standard one sun illumination (AM 1.5G, 100 mW cm(-2)). The results indicate that these NIR core/shell QDs are promising candidates for future QD-based optoelectronic technologies such as QD-sensitized solar cells (QDSCs).
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页码：10225 / 10230
页数：6
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