{"title":"Cu(I) - Doping Induced Suppression of Multiexciton Auger Recombination in CdS Quantum Dots.","authors":"Gourab Rana, Sharmistha Das, Anindya Datta","doi":"10.1002/asia.202500220","DOIUrl":null,"url":null,"abstract":"<p><p>Metal chalcogenide quantum dots (QDs) are attractive because of their application in photovoltaics and light emitting devices (LEDs). Non-radiative Auger recombination is a major hindrance in this regard. Doping with metal ions is an effective modality to overcome this issue. In the present work, the effect of Cu(I) doping in supressing the nonradiative Auger recombination in MPA-capped CdS QDs in aqueous medium is examined as is evidenced by ultrafast transient absorption spectroscopy and femtosecond optical gating. Doped QDs have shown a significant longer bi-exciton lifetime. This observation has proven that hole trapping to dopant energy level reduce the Auger process. This comparative study elucidates the understanding and set the practical guidelines for controlling the multicarrier Auger recombination in similar QDs.</p>","PeriodicalId":145,"journal":{"name":"Chemistry - An Asian Journal","volume":" ","pages":"e202500220"},"PeriodicalIF":3.5000,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemistry - An Asian Journal","FirstCategoryId":"1","ListUrlMain":"https://doi.org/10.1002/asia.202500220","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Metal chalcogenide quantum dots (QDs) are attractive because of their application in photovoltaics and light emitting devices (LEDs). Non-radiative Auger recombination is a major hindrance in this regard. Doping with metal ions is an effective modality to overcome this issue. In the present work, the effect of Cu(I) doping in supressing the nonradiative Auger recombination in MPA-capped CdS QDs in aqueous medium is examined as is evidenced by ultrafast transient absorption spectroscopy and femtosecond optical gating. Doped QDs have shown a significant longer bi-exciton lifetime. This observation has proven that hole trapping to dopant energy level reduce the Auger process. This comparative study elucidates the understanding and set the practical guidelines for controlling the multicarrier Auger recombination in similar QDs.
期刊介绍：
Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics.
Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews.
A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal.
Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).
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