Background: Hybrid perovskite quantum dots (PQDs) are the good light harvesters due to their outstanding optical and electrical properties, which, aroused great interest of scientists in perovskite materials now a day. But FAPbBr3 PQDs still suffering due to lower stability, complicated synthesis process and lower color gamut of devices. Methods: FA1-xCsxPbBr3 PQDs were fabricated via the rapid ligand-assisted reprecipitation processes thru the variation in the concentrations of cesium (Cs+) ions from 0 to 100 mol%. Significant findings: To overcome the stability issues, Cs+ was incorporated into FAPbBr3 PQDs that demonstrated distinctive PL emission peak shifting towards the blue region. FA1-xCsxPbBr3 PQDs doped with 80 mol% of Cs+ ions showed a high color purity of 88% as well as a photoluminescence quantum yield (PLQY) of 85%. Moreover, FA1-xCsxPbBr3 PQDs doped with 80 mol% of Cs+ ions exhibited good environmental stability in the ambient conditions. The color gamut of the synthesized white light-emitting devices fabricated with FA1-xCsxPbBr3 PQDs at cesium concentrations of 80 mol% was 118% of the NTSC. The present research indicated that the incorporation of cesium ions in FAPbBr3 PQDs was an effective method to prepare PQDs with a high PLQY, color gamut, narrow bandwidth emission, good environmental stability.
|Journal||Journal of the Taiwan Institute of Chemical Engineers|
|Publication status||Published - 2022 Oct|
- Color gamut
- Perovskite quantum dot
- Photoluminescence quantum yield
ASJC Scopus subject areas
- Chemical Engineering(all)