中文版 | English
Title

Blue Lasing from Heavy-Metal-Free Colloidal Quantum Dots

Author
Corresponding AuthorLi,Mingjie; Sun,Xiao Wei; Gao,Yuan
Publication Years
2022
DOI
Source Title
ISSN
1863-8880
EISSN
1863-8899
Abstract
Colloidal quantum dots (CQDs) have emerged as promising candidates for solution-processed optical gain materials. Despite the substantial progress made with Cd or Pb-contained CQDs, lasing from the environmentally friendly CQDs remains underexplored. Here, the highly emissive ZnSeTe/ZnSe/ZnS and ZnSe/ZnS CQDs is developed. The optical gain and lasing action from such Te-alloyed and intrinsic ZnSe/ZnS CQDs across the blue spectral region is achieved. Te-alloyed ZnSe core manifests a quasitype-II band alignment with the ZnSe intermediate layer, favorable for suppressing the Auger recombination and also lasing wavelength tuning. The transient absorption spectroscopy reveals evidence of a blue optical gain with a threshold of one exciton per dot and a lifetime of 171 ps in the alloyed CQDs. Under a quasicontinuous-wave pumping, lasing is observed from the blue CQDs in Fabry–Pérot cavities with a lower threshold fluence of 12.5 µJ cm as compared with the traditional counterparts with heavy metals. The demonstration of heavy-metal-free CQD lasing opens up new opportunities in the application of CQDs as efficient and environmental-friendly gain media.
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
Corresponding
Funding Project
[tsqn201909042] ; [25301522] ; [1-BE2Z] ; [1-CD5C] ; [R2021A064] ; [61904152]
WOS Research Area
Optics ; Physics
WOS Subject
Optics ; Physics, Applied ; Physics, Condensed Matter
WOS Accession No
WOS:000888406000001
Publisher
Scopus EID
2-s2.0-85143378241
Data Source
Scopus
Citation statistics
Cited Times [WOS]:1
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/416540
Affiliation
1.School of Information Sciences and Engineering,Shandong University,Qingdao,266237,China
2.Key Laboratory of Laser & Infrared System (Shandong University),Ministry of Education,Shandong University,Qingdao,266237,China
3.Department of Applied Physics,Photonics Research Institute,The Hong Kong Polytechnic University,Hong Kong
4.Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology),Ministry of Education,Shenzhen,518055,China
Corresponding Author AffilicationSouthern University of Science and Technology
Recommended Citation
GB/T 7714
Wei,Huayu,Wei,Qi,Fang,Fan,et al. Blue Lasing from Heavy-Metal-Free Colloidal Quantum Dots[J]. Laser & Photonics Reviews,2022.
APA
Wei,Huayu.,Wei,Qi.,Fang,Fan.,Xiang,Guohong.,Tong,Bingyi.,...&Gao,Yuan.(2022).Blue Lasing from Heavy-Metal-Free Colloidal Quantum Dots.Laser & Photonics Reviews.
MLA
Wei,Huayu,et al."Blue Lasing from Heavy-Metal-Free Colloidal Quantum Dots".Laser & Photonics Reviews (2022).
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