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

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Abstract

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 ∼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 ∼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).

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

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Publication details

The article was received on 27 Jan 2019, accepted on 02 Apr 2019 and first published on 03 Apr 2019


Article type: Communication
DOI: 10.1039/C9TA01052A
Citation: J. Mater. Chem. A, 2019, Advance Article

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

    A. I. Channa, X. Tong, J. Xu, Y. Liu, C. Wang, M. N. Sial, P. Yu, H. Ji, X. Niu and Z. M. Wang, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA01052A

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