onr:"swepub:oai:lup.lub.lu.se:18dee2bb-5e66-43ce-a206-7841a104419d"
Sökning: onr:"swepub:oai:lup.lub.lu.se:18dee2bb-5e66-43ce-a206-7841a104419d" > Controlled synthesi...
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
Controlled synthesis of highly stable lead-free bismuth halide perovskite nanocrystals : tructures and photophysics
-
- Geng, Huifang (författare)
- Nankai University
-
- Huang, Zhuanzhuan (författare)
- Nankai University,Tianjin University
-
- Geng, Huaxiu (författare)
- Tianjin University
- visa fler...
- visa färre...
- (creator_code:org_t)
- 2023-01-05
- 2023
- Engelska.
- Ingår i: SCIENCE CHINA Materials. - : Springer Science and Business Media LLC. - 2095-8226 .- 2199-4501. ; 66:5, s. 2079-2089
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Recently, cesium bismuth halide perovskites have emerged as potential substitutes to their counterparts, cesium lead halide perovskites, owing to their low toxicity. However, the photophysics of cesium-bismuth halides nanocrystals (NCs) have not yet been fully rationalized because their structures remain highly debated. The ultraviolet-visible (UV-vis) absorption along with other photophysical properties such as the nature and lifetime of the excited states vary considerably across the previous reports. Here, we successfully synthesize pure Cs3BiBr6 and Cs3Bi2Br9 NCs via a modified hot-injection method, where the structure can be easily controlled by tuning the reaction temperature. The UV-vis absorption spectrum of the pure Cs3Bi2Br9 NCs features two characteristic peaks originating from the absorption of the first exciton and second exciton, respectively, which ultimately clarifies the debate in the previous reports. Using femtosecond transient absorption spectroscopy, we systematically investigate the excited state dynamics of the Cs3Bi2Br9 NCs and reveal that the photoexcited carriers undergo a self-trapping process within 3 ps after excitation. More intriguingly, the Cs3Bi2Br9 NCs prepared by this method show much better photostability than those prepared by the ligand-assisted reprecipitation process. Photodetectors based on these Cs3Bi2Br9 NCs show a sensitive light response, demonstrating the definite potential for breakthrough optoelectronic applications. [Figure not available: see fulltext.].
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- bismuth perovskites
- hot injection
- lead-free perovskites
- nanocrystals
- photostability
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
- SCIENCE CHINA Materials (Sök värdpublikationen i LIBRIS)
Till lärosätets databas
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
Hitta mer i SwePub
- Av författaren/redakt...
- Geng, Huifang
- Huang, Zhuanzhua ...
- Geng, Huaxiu
- Liu, Siyu
- Naumova, Maria A ...
- Salvia, Raffaele
- visa fler...
- Chen, Siqi
- Wei, Junli
- Zhang, Lifu
- Zou, Xianshao
- Lin, Weihua
- Cai, Xinyi
- Yuan, Mingjian
- Hu, Zhenpeng
- Shen, Xi
- Yu, Richeng
- Zheng, Kaibo
- Canton, Sophie E ...
- Fu, Xuewen
- visa färre...
- Om ämnet
-
- NATURVETENSKAP
- NATURVETENSKAP
- och Kemi
- och Fysikalisk kemi
- Artiklar i publikationen
- SCIENCE CHINA Ma ...
- Av lärosätet
- Lunds universitet
Sök utanför SwePub
- Sök vidare i:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - Nationella bibliotekssystem
- LIBRIS.kb.se
