TY - JOUR
T1 - Strongly Anchored Dion-Jacobson Perovskite for Efficient Blue Light-Emitting Diodes
AU - Qi, Heng
AU - Tong, Yu
AU - Wang, Yibo
AU - Liu, Yue
AU - Sheng, Zhixin
AU - Kaisha, Aitkazy
AU - Toktarbaiuly, Olzat
AU - Pang, Peiyuan
AU - Xing, Guichuan
AU - Wang, Kun
AU - Wang, Hongqiang
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2025/1/8
Y1 - 2025/1/8
N2 - Dion-Jacobson (DJ) perovskites are promising alternatives for Ruddlesden-Popper (RP) perovskites to fabricate blue perovskite light-emitting diodes (PeLEDs) due to their favorable structural and charge properties. However, the relatively weak hydrogen bond between the bridging diammonium group and perovskite poses huge challenges for regulating crystallization and defect density, leading to an undesirable film quality and device performance. Herein, we report the successful optimization of DJ perovskite films by introducing a new type of cesium octafluoroadipate (CsOFAA) precursor, which could strongly anchor the perovskite through coordination bonds and halogen-halogen bonds. Such an interaction between CsOFAA and perovskite significantly stabilizes the DJ perovskite structure and suppresses the nonradiative recombination, leading to high-performance DJ perovskite films with efficient and stable blue emission. Accordingly, high external quantum efficiency values of 15.2%, 10.0%, and 8.3% are achieved for PeLEDs with emission peaks at 490, 485, and 479 nm, respectively, representing the most efficient blue DJ PeLEDs.
AB - Dion-Jacobson (DJ) perovskites are promising alternatives for Ruddlesden-Popper (RP) perovskites to fabricate blue perovskite light-emitting diodes (PeLEDs) due to their favorable structural and charge properties. However, the relatively weak hydrogen bond between the bridging diammonium group and perovskite poses huge challenges for regulating crystallization and defect density, leading to an undesirable film quality and device performance. Herein, we report the successful optimization of DJ perovskite films by introducing a new type of cesium octafluoroadipate (CsOFAA) precursor, which could strongly anchor the perovskite through coordination bonds and halogen-halogen bonds. Such an interaction between CsOFAA and perovskite significantly stabilizes the DJ perovskite structure and suppresses the nonradiative recombination, leading to high-performance DJ perovskite films with efficient and stable blue emission. Accordingly, high external quantum efficiency values of 15.2%, 10.0%, and 8.3% are achieved for PeLEDs with emission peaks at 490, 485, and 479 nm, respectively, representing the most efficient blue DJ PeLEDs.
KW - Blue Light-Emitting Diodes
KW - Dion−Jacobson Perovskite
KW - Perfluorodicarboxylate Salt
KW - Strong Anchoring Effect
UR - https://www.scopus.com/pages/publications/85213271821
U2 - 10.1021/acs.nanolett.4c05124
DO - 10.1021/acs.nanolett.4c05124
M3 - 文章
C2 - 39721965
AN - SCOPUS:85213271821
SN - 1530-6984
VL - 25
SP - 353
EP - 360
JO - Nano Letters
JF - Nano Letters
IS - 1
ER -