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).

引用

页码：10225 / 10230

页数：6

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