KAUST DepartmentChemical Science Program
KAUST Solar Center (KSC)
Physical Science and Engineering (PSE) Division
Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
Online Publication Date2019-11-22
Print Publication Date2020-01-10
Embargo End Date2020-11-22
Permanent link to this recordhttp://hdl.handle.net/10754/660932
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AbstractGreen-emitting zero-dimensional perovskite Cs4PbBr6, consisting of an array of isolated [PbBr6]4- octahedra, has drawn a magnitude of interest due to its peculiar yet robust photoluminescence properties. Given many advances in the past few years, the true nature of the unusual green emission from a wide-bandgap Cs4PbBr6 remains elusive. Although a number of reviews have been published on this subject, the emerging evidence motivates us to summarize the rapid progress about the debate, whereby critical comments were made to either rationalize or question each point of view. This Review summarizes the latest findings on the PL origins covering both CsPbBr3 impurity and defect theories. Specifically, the chemical nature of the defects, including Br vacancies, polybromide, self-trapped excitons, and interstitial molecules, is discussed. The phase transformation between CsPbBr3 and Cs4PbBr6 is particularly stressed because it has brought more cloud on the PL puzzle. Finally, we discuss the potential application of this material and envisioned several future directions that may clarify the mechanism of PL.
CitationWang, L., Liu, H., Zhang, Y., & Mohammed, O. F. (2019). Photoluminescence Origin of Zero-Dimensional Cs4PbBr6 Perovskite. ACS Energy Letters, 87–99. doi:10.1021/acsenergylett.9b02275
SponsorsThis work is supported by the National Natural Science Foundation of China (No. 21805111 and 11405073) and the Taishan Scholar Fund (No. tsqn201812082). L.W. has been supported by the German DAAD-Wong Kuan Cheng Fellowship (57453998).
PublisherAmerican Chemical Society (ACS)
JournalACS Energy Letters