Photoluminescence of PdS2 and PdSe2 quantum dots

Xinyu Wang; Wayesh Qarony; Ping Kwong Cheng; Mohammad Ismail; Yuen Hong Tsang

doi:10.1039/c9ra07445g

Photoluminescence of PdS₂ and PdSe₂ quantum dots

Xinyu Wang, Wayesh Qarony, Ping Kwong Cheng, Mohammad Ismail, Yuen Hong Tsang

Research output: Journal article publication › Journal article › Academic research › peer-review

15 Citations (Scopus)

Abstract

Group-10 transition metal dichalcogenide (TMD) materials have recently attracted considerable attention in optoelectronics applications. However, so far their quantum dot (QD) counterparts with photoluminescence (PL) nature still remain to be revealed. In this study, 2 typical types of group-10 TMD material (PdS₂ and PdSe₂) QDs are fabricated via liquid exfoliation using N-methyl-2-pyrrolidone (NMP) solvent. The absorption and PL spectra of these QD solutions are studied, exhibiting excitation wavelength-dependent behaviors and large Stokes shifts. Furthermore, the quantum yield and decay lifetime are also investigated and analyzed. The obtained results suggest promising optoelectronic applications with group-10 TMD QDs in the future.

Original language	English
Pages (from-to)	38077-38084
Number of pages	8
Journal	RSC Advances
Volume	9
Issue number	65
DOIs	https://doi.org/10.1039/c9ra07445g
Publication status	Published - 21 Nov 2019

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1039/c9ra07445g

http://hdl.handle.net/10397/81774

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AU - Ismail, Mohammad

AU - Tsang, Yuen Hong

PY - 2019/11/21

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AB - Group-10 transition metal dichalcogenide (TMD) materials have recently attracted considerable attention in optoelectronics applications. However, so far their quantum dot (QD) counterparts with photoluminescence (PL) nature still remain to be revealed. In this study, 2 typical types of group-10 TMD material (PdS2 and PdSe2) QDs are fabricated via liquid exfoliation using N-methyl-2-pyrrolidone (NMP) solvent. The absorption and PL spectra of these QD solutions are studied, exhibiting excitation wavelength-dependent behaviors and large Stokes shifts. Furthermore, the quantum yield and decay lifetime are also investigated and analyzed. The obtained results suggest promising optoelectronic applications with group-10 TMD QDs in the future.

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Photoluminescence of PdS₂ and PdSe₂ quantum dots

Abstract

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