TY - JOUR
T1 - Incorporation of Cesium ions in FAPbBr3 quantum dots
T2 - Spectroscopic characterization for light-emitting application
AU - Liu, Yi Hsin
AU - Singh, Rajan Kumar
AU - Lu, Shao An
AU - Som, Sudipta
AU - Lu, Chung Hsin
N1 - Funding Information:
This work was funded by the Ministry of Science and Technology in Taiwan (MOST 110-2634-F-002-043) and MOST-111-2634-F-002-016 and also sponsored by “Advanced Research Center of Green Materials Science and Technology” from ‘The Featured Area Research Center Program’ within the framework of the ‘Higher Education Sprout Project’ by the Ministry of Education (110L9006).
Publisher Copyright:
© 2022
PY - 2022/10
Y1 - 2022/10
N2 - 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.
AB - 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.
KW - Color gamut
KW - Perovskite quantum dot
KW - Photoluminescence quantum yield
KW - Stability
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U2 - 10.1016/j.jtice.2022.104469
DO - 10.1016/j.jtice.2022.104469
M3 - Article
AN - SCOPUS:85138450445
SN - 1876-1070
VL - 139
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
M1 - 104469
ER -