Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 12, 2019
Previous Article Next Article

Controlled synthesis and photostability of blue emitting Cs3Bi2Br9 perovskite nanocrystals by employing weak polar solvents at room temperature

Author affiliations

Abstract

Metal halide nanocrystals (NCs) have attracted intensive interest due to their unique optical properties and cheap synthesis which endows them with tremendous potential for application in the field of optoelectronic devices. However, lead toxicity obstructs their commercialization. Therefore, environment- and consumer-friendly all-inorganic lead-free perovskite NCs are highly desirable in terms of application, and recent efforts have investigated lead-free halide perovskite NCs. Herein, in this present work, all-inorganic Cs3Bi2Br9 perovskite NCs were synthesized for the first time with a weak-polar solvent at room temperature (WPRT). As-synthesized Cs3Bi2Br9 perovskite NCs demonstrated blue dual-emission peaks at 414 nm and 433 nm with a full width at half-maximum (FWHM) of 50 nm and a photoluminescence quantum yield (PLQY) up to 29.6%. Notably, the NCs exhibited high stability upon air exposure exceeding three weeks since the trap states could be passivated under humid conditions. Furthermore, it was also found that potassium oleate (K-OA) solution could enhance the PLQY of Cs3Bi2Br9 perovskite NCs.

Graphical abstract: Controlled synthesis and photostability of blue emitting Cs3Bi2Br9 perovskite nanocrystals by employing weak polar solvents at room temperature

Back to tab navigation

Supplementary files

Article information


Submitted
22 Jan 2019
Accepted
24 Feb 2019
First published
27 Feb 2019

J. Mater. Chem. C, 2019,7, 3688-3695
Article type
Paper

Controlled synthesis and photostability of blue emitting Cs3Bi2Br9 perovskite nanocrystals by employing weak polar solvents at room temperature

M. Gao, C. Zhang, L. Lian, J. Guo, Y. Xia, F. Pan, X. Su, J. Zhang, H. Li and D. Zhang, J. Mater. Chem. C, 2019, 7, 3688
DOI: 10.1039/C9TC00400A

Social activity

Search articles by author

Spotlight

Advertisements