On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr.sub.3./sub. nanoplatelets

0520348 - FZÚ 2020 RIV US eng J - Journal Article
Tomanová, K. - Čuba, V. - Brik, M.G. - Mihóková, Eva - Turtos, R.M. - Lecoq, P. - Auffray, E. - Nikl, Martin
On the structure, synthesis, and characterization of ultrafast blue-emitting CsPbBr₃ nanoplatelets.
APL Materials. Roč. 7, č. 1 (2019), s. 1-12, č. článku 011104. ISSN 2166-532X. E-ISSN 2166-532X
R&D Projects: GA ČR GA17-06479S; GA MŠMT EF16_027/0008215
EU Projects: European Commission(XE) 690599 - ASCIMAT
Grant - others:COST(XE) TD1401; MOBILITY FZU(XE) CZ.02.2.69/0.0/0.0/16_027/0008215
Institutional support: RVO:68378271
Keywords : nanoplatelets * TOF PET * photoluminescence * scintillators * nanocomposite * crystal-structure * perovskites * CsPbBr₃
OECD category: Physical chemistry
Impact factor: 3.819, year: 2019
Method of publishing: Open access

We synthesize colloidal CsPbBr3 nanoplatelets emitting blue light with fast sub-nanosecond decay. We also prepare a nanocomposite material by embedding the nanoplatelets in the polystyrene matrix. We show that blue emission is preserved provided the composite is not exposed to UV/vis light and/or elevated temperatures. Motivated by conflicting information from the literature about the room temperature structure of colloidal CsPbX3 (X = Cl, Br, I) particles, that results being orthorhombic, rather than cubic, we perform ab initio electronic structure calculations of bulk crystals with an orthorhombic structure. We calculate optical properties, as well as exciton diameters and binding energies and compare them to those previously obtained for cubic CsPbX3 crystals.

Permanent Link: http://hdl.handle.net/11104/0305030