Journal of Luminescence, volume 250, pages 119065
High efficiency luminescence from PbS quantum dots embedded glasses for near-infrared light emitting diodes
Publication type: Journal Article
Publication date: 2022-10-01
Journal:
Journal of Luminescence
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor: 3.6
ISSN: 00222313
General Chemistry
Biochemistry
Biophysics
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Abstract
PbS quantum dots (QDs) embedded glasses have been investigated for decades, but their applications are limited to the color filters and saturable absorbers for laser pulse generation so far, mainly due to the low photoluminescence quantum yield (PL QY) induced by the surface defects. Here, by increasing the sulfur to lead molar ratio in the glasses, surface defects of PbS QDs can be partially passivated and the fast trapping of charge carriers is reduced. As a result, PL QY of PbS QDs embedded glasses increases with larger sulfur to lead molar ratio, and PL QY as high as 46.9% is achieved. The improved PL QY along with good thermal and photo-stability makes the PbS QDs embedded glasses promising for near-infrared light generation. By integrating the PbS QDs embedded glass slab with light emitting diode (LED) chip, NIR LEDs with external quantum efficiency of 4.47% (@ ∼1.4 μm) with full width at half maximum larger than 140 nm are realized. Using this approach, it is also versatile to fabricate high-performance and broadband NIR LEDs with PbS QDs embedded glasses as light converters. • Large molar ratio between S and Pb is beneficial to passivate the surface defects of PbS QDs in glasses. • Photoluminescence quantum efficiency as high as 46.9% was realized for PbS QDs embedded glasses. • Passivation of surface defects of PbS QDs in glasses improved their resistance to temperature and light irradiation. • EQE of near-infrared LED based on PbS QDs in glass as high as 4.47% was achieved.
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Yin Q. et al. High efficiency luminescence from PbS quantum dots embedded glasses for near-infrared light emitting diodes // Journal of Luminescence. 2022. Vol. 250. p. 119065.
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Yin Q., Zhang W., Zhou Y., Wang R., Zhao Z., Liu C. High efficiency luminescence from PbS quantum dots embedded glasses for near-infrared light emitting diodes // Journal of Luminescence. 2022. Vol. 250. p. 119065.
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TY - JOUR
DO - 10.1016/j.jlumin.2022.119065
UR - https://doi.org/10.1016/j.jlumin.2022.119065
TI - High efficiency luminescence from PbS quantum dots embedded glasses for near-infrared light emitting diodes
T2 - Journal of Luminescence
AU - Yin, Qiaoyun
AU - Zhang, Wenchao
AU - Zhou, Yao
AU - Wang, Ruzhi
AU - Zhao, Zhiyong
AU - Liu, Chao
PY - 2022
DA - 2022/10/01 00:00:00
PB - Elsevier
SP - 119065
VL - 250
SN - 0022-2313
ER -
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@article{2022_Yin,
author = {Qiaoyun Yin and Wenchao Zhang and Yao Zhou and Ruzhi Wang and Zhiyong Zhao and Chao Liu},
title = {High efficiency luminescence from PbS quantum dots embedded glasses for near-infrared light emitting diodes},
journal = {Journal of Luminescence},
year = {2022},
volume = {250},
publisher = {Elsevier},
month = {oct},
url = {https://doi.org/10.1016/j.jlumin.2022.119065},
pages = {119065},
doi = {10.1016/j.jlumin.2022.119065}
}
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