TY - JOUR
T1 - Anion regulation for surface passivation enables ultrahigh-stability perovskite nanocrystals
AU - Zhang, Tong
AU - Zu, Yanqing
AU - Zeng, Binglin
AU - Gan, Run
AU - Liu, Peitao
AU - Li, Xiaodong
AU - Han, Fengbo
AU - Qian, Yu
AU - Zhao, Lei
AU - Feng, Ailing
AU - Wu, Zhaoxin
N1 - Publisher Copyright:
© 2024 Author(s).
PY - 2024/10/28
Y1 - 2024/10/28
N2 - All-inorganic perovskite CsPbBr3 nanocrystals (NCs) display high photoluminescence quantum yield and narrow emission, which show great potential application in optoelectronic devices. However, the poor environment stability of NCs will hinder their practical application. Herein, a series of ionic liquids with different anions (BF4−, Br−, and NO3−) were used as a sole capping ligand to synthesize NCs. Among the three samples, 1-hexadecyl-3-methylimidazolium tetrafluoroborate ([C16MIM]BF4) capped NCs have the highest stability in light, thermal, and water, possibly attributing to the in situ passivation of bromine vacancy via pseudohalogen BF4− and tight binding of ionic liquid ligands and lead atoms. In addition, green-emission [C16MIM]BF4 NCs were used to assemble a white light-emitting diode device, and it possessed a wide National Television System Committee color gamut of 124.5% and a stable emission peak at high driving currents of 380 mA. This work paves the way for resurfacing perovskite NCs with ultrahigh stability, thereby driving the perovskite NC display industry closer to real-world application.
AB - All-inorganic perovskite CsPbBr3 nanocrystals (NCs) display high photoluminescence quantum yield and narrow emission, which show great potential application in optoelectronic devices. However, the poor environment stability of NCs will hinder their practical application. Herein, a series of ionic liquids with different anions (BF4−, Br−, and NO3−) were used as a sole capping ligand to synthesize NCs. Among the three samples, 1-hexadecyl-3-methylimidazolium tetrafluoroborate ([C16MIM]BF4) capped NCs have the highest stability in light, thermal, and water, possibly attributing to the in situ passivation of bromine vacancy via pseudohalogen BF4− and tight binding of ionic liquid ligands and lead atoms. In addition, green-emission [C16MIM]BF4 NCs were used to assemble a white light-emitting diode device, and it possessed a wide National Television System Committee color gamut of 124.5% and a stable emission peak at high driving currents of 380 mA. This work paves the way for resurfacing perovskite NCs with ultrahigh stability, thereby driving the perovskite NC display industry closer to real-world application.
UR - https://www.scopus.com/pages/publications/85207327518
U2 - 10.1063/5.0234793
DO - 10.1063/5.0234793
M3 - 文章
C2 - 39450731
AN - SCOPUS:85207327518
SN - 0021-9606
VL - 161
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
IS - 16
M1 - 164710
ER -