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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/48175

Title: Origins of excitation-wavelength-dependent photoluminescence in WS2 quantum dots
Authors: Septem P. Caigas
Svette Reina Merden Santiago
Tzu-Neng Lin
Chi-Tsu Yuan
Ji-Lin Shen
Tai-Yuan Lin
Cheng-An J. Lin
Contributors: 國立臺灣海洋大學:光電與材料科技學系
Date: 2018-02
Issue Date: 2018-08-15T03:59:27Z
Publisher: Appl. Phys. Lett.
Abstract: Abstract: We report the photoluminescence studies of pristine and diethylenetriamine-doped (DETA-doped) WS2 quantum dots (QDs) synthesized by pulsed laser ablation. The DETA-doped WS2 QDs revealed a notable improvement of the luminescence quantum yield from 0.1% to 15.2% in comparison to pristine WS2 QDs. On the basis of the photoluminescence (PL) under different excitation wavelengths and the emission-energy dependence of PL dynamics, we suggest that the excitation-wavelength-dependent (excitation-wavelength-independent) PL for pristine (DETA-doped) WS2 QDs is attributed to the recombination of carriers from the localized (delocalized) states.
Relation: 112(9)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/48175
Appears in Collections:[光電科學研究所] 期刊論文

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