Emergence of multiple fluorophores in individual cesium lead bromide nanocrystals

Yuhai Zhang, Tianle Guo, Haoze Yang, Riya Bose, Lingmei Liu, Jun Yin, Yu Han, Osman M. Bakr, Omar F. Mohammed () and Anton V. Malko ()
Additional contact information
Yuhai Zhang: King Abdullah University of Science and Technology
Tianle Guo: The University of Texas at Dallas
Haoze Yang: King Abdullah University of Science and Technology
Riya Bose: The University of Texas at Dallas
Lingmei Liu: King Abdullah University of Science and Technology
Jun Yin: King Abdullah University of Science and Technology
Yu Han: King Abdullah University of Science and Technology
Osman M. Bakr: King Abdullah University of Science and Technology
Omar F. Mohammed: King Abdullah University of Science and Technology
Anton V. Malko: The University of Texas at Dallas

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Cesium-based perovskite nanocrystals (PNCs) possess alluring optical and electronic properties via compositional and structural versatility, tunable bandgap, high photoluminescence quantum yield and facile chemical synthesis. Despite the recent progress, origins of the photoluminescence emission in various types of PNCs remains unclear. Here, we study the photon emission from individual three-dimensional and zero-dimensional cesium lead bromide PNCs. Using photon antibunching and lifetime measurements, we demonstrate that emission statistics of both type of PNCs are akin to individual molecular fluorophores, rather than traditional semiconductor quantum dots. Aided by density functional modelling, we provide compelling evidence that green emission in zero-dimensional PNCs stems from exciton recombination at bromide vacancy centres within lead-halide octahedra, unrelated to external confinement. These findings provide key information about the nature of defect formation and the origin of emission in cesium lead halide perovskite materials, which foster their utilization in the emerging optoelectronic applications.

Date: 2019
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-019-10870-1 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10870-1

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-019-10870-1

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().