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- Publisher Website: 10.1021/acs.jpclett.9b02289
- Scopus: eid_2-s2.0-85072935105
- PMID: 31549509
- WOS: WOS:000492425100001
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Article: Mechanism of Single-Photon Upconversion Photoluminescence in All-Inorganic Perovskite Nanocrystals: The Role of Self-Trapped Excitons
| Title | Mechanism of Single-Photon Upconversion Photoluminescence in All-Inorganic Perovskite Nanocrystals: The Role of Self-Trapped Excitons |
|---|---|
| Authors | |
| Keywords | Bromine compounds Cesium compounds Excitons Laser cooling Lead compounds |
| Issue Date | 2019 |
| Publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/loi/jpclcd |
| Citation | The Journal of Physical Chemistry Letters, 2019, v. 10 n. 20, p. 5989-5996 How to Cite? |
| Abstract | The efficient single-photon upconversion photoluminescence (UCPL) feature of lead halide perovskite semiconductors makes it promising for developing laser cooling devices. This is an attractive potential application, but the underlying physics still remains unclear so far. By using the all-inorganic CsPbX3 (X = Br, I) nanocrystal samples, this phenomenon was investigated by photoluminescence (PL) and time-resolved PL under different temperatures and various excitation conditions. A broad emission band located at the low-energy side of the free exciton (FE) peak was detected and deduced to be from the self-trapped exciton (STE). The lifetime of STE emission was found to be 171 ns at 10 K, much longer than that of FE. The UCPL phenomenon was then attributed to thermal activation of transformation from STEs to FEs, and the energy barrier was derived to be 103.7 meV for CsPbBr3 and 45.2 meV for CsPb(Br/I)3, respectively. The transformation also can be seen from the fluorescence decay processes. |
| Persistent Identifier | http://hdl.handle.net/10722/279987 |
| ISSN | 2021 Impact Factor: 6.888 2020 SCImago Journal Rankings: 2.563 |
| ISI Accession Number ID |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Ma, X | - |
| dc.contributor.author | Pan, F | - |
| dc.contributor.author | Li, H | - |
| dc.contributor.author | Shen, P | - |
| dc.contributor.author | Ma, C | - |
| dc.contributor.author | Zhang, L | - |
| dc.contributor.author | Niu, H | - |
| dc.contributor.author | Zhu, Y | - |
| dc.contributor.author | Xu, S | - |
| dc.contributor.author | Ye, H | - |
| dc.date.accessioned | 2019-12-23T08:24:37Z | - |
| dc.date.available | 2019-12-23T08:24:37Z | - |
| dc.date.issued | 2019 | - |
| dc.identifier.citation | The Journal of Physical Chemistry Letters, 2019, v. 10 n. 20, p. 5989-5996 | - |
| dc.identifier.issn | 1948-7185 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/279987 | - |
| dc.description.abstract | The efficient single-photon upconversion photoluminescence (UCPL) feature of lead halide perovskite semiconductors makes it promising for developing laser cooling devices. This is an attractive potential application, but the underlying physics still remains unclear so far. By using the all-inorganic CsPbX3 (X = Br, I) nanocrystal samples, this phenomenon was investigated by photoluminescence (PL) and time-resolved PL under different temperatures and various excitation conditions. A broad emission band located at the low-energy side of the free exciton (FE) peak was detected and deduced to be from the self-trapped exciton (STE). The lifetime of STE emission was found to be 171 ns at 10 K, much longer than that of FE. The UCPL phenomenon was then attributed to thermal activation of transformation from STEs to FEs, and the energy barrier was derived to be 103.7 meV for CsPbBr3 and 45.2 meV for CsPb(Br/I)3, respectively. The transformation also can be seen from the fluorescence decay processes. | - |
| dc.language | eng | - |
| dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/loi/jpclcd | - |
| dc.relation.ispartof | The Journal of Physical Chemistry Letters | - |
| dc.rights | This document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html]. | - |
| dc.subject | Bromine compounds | - |
| dc.subject | Cesium compounds | - |
| dc.subject | Excitons | - |
| dc.subject | Laser cooling | - |
| dc.subject | Lead compounds | - |
| dc.title | Mechanism of Single-Photon Upconversion Photoluminescence in All-Inorganic Perovskite Nanocrystals: The Role of Self-Trapped Excitons | - |
| dc.type | Article | - |
| dc.identifier.email | Xu, S: sjxu@hku.hk | - |
| dc.identifier.authority | Xu, S=rp00821 | - |
| dc.description.nature | link_to_subscribed_fulltext | - |
| dc.identifier.doi | 10.1021/acs.jpclett.9b02289 | - |
| dc.identifier.pmid | 31549509 | - |
| dc.identifier.scopus | eid_2-s2.0-85072935105 | - |
| dc.identifier.hkuros | 308715 | - |
| dc.identifier.volume | 10 | - |
| dc.identifier.issue | 20 | - |
| dc.identifier.spage | 5989 | - |
| dc.identifier.epage | 5996 | - |
| dc.identifier.isi | WOS:000492425100001 | - |
| dc.publisher.place | United States | - |
| dc.identifier.issnl | 1948-7185 | - |