TY - JOUR
T1 - Interlayer-Sensitized Linear and Nonlinear Photoluminescence of Quasi-2D Hybrid Perovskites Using Aggregation-Induced Enhanced Emission Active Organic Cation Layers
AU - Lim, Chang Keun
AU - Maldonado, Melissa
AU - Zalesny, Robert
AU - Valiev, Rashid
AU - Ågren, Hans
AU - Gomes, Anderson S.L.
AU - Jiang, Jie
AU - Pachter, Ruth
AU - Prasad, Paras N.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - A concept of interlayer-sensitized photoluminescence (PL) of quasi-2D hybrid perovskite (PVK) with a π-conjugated optically interacting organic cation layer is introduced and demonstrated. A rod-shaped aggregation-induced enhanced emission (AIEE) organic cation (BPCSA+), well fitted into the lattice size of 2D PVK layers, is designed and synthesized to prolong the exciton lifetime in a condensed layer assembly in the PVK. The BPCSA+ promotes the PL of this hybrid PVK up to 10-folds from that of a non-π-conjugated organic cation (OA) 2D PVK. Notably, different from PL of OA 2D PVK, the increased PL intensity of BPCSA 2D PVKs with an increase of the BPCSA ratio in the PVK indicates a critical photon-harvesting contribution of BPCSA. The films of BPCSA 2D PVKs are incredibly stable in ambient environments for more than 4 months and even upon direct contact with water. Additionally, due to the strong two-photon absorption property of BPCSA, the BPCSA 2D PVK displays superior emission properties upon two-photon excitation with a short wavelength IR laser. Thus, the AIEE sensitization system for quasi-2D PVK hybrid system can make a drastic improvement in performance as well as in the stability of the PVK emitter and PVK based nonlinear optical devices.
AB - A concept of interlayer-sensitized photoluminescence (PL) of quasi-2D hybrid perovskite (PVK) with a π-conjugated optically interacting organic cation layer is introduced and demonstrated. A rod-shaped aggregation-induced enhanced emission (AIEE) organic cation (BPCSA+), well fitted into the lattice size of 2D PVK layers, is designed and synthesized to prolong the exciton lifetime in a condensed layer assembly in the PVK. The BPCSA+ promotes the PL of this hybrid PVK up to 10-folds from that of a non-π-conjugated organic cation (OA) 2D PVK. Notably, different from PL of OA 2D PVK, the increased PL intensity of BPCSA 2D PVKs with an increase of the BPCSA ratio in the PVK indicates a critical photon-harvesting contribution of BPCSA. The films of BPCSA 2D PVKs are incredibly stable in ambient environments for more than 4 months and even upon direct contact with water. Additionally, due to the strong two-photon absorption property of BPCSA, the BPCSA 2D PVK displays superior emission properties upon two-photon excitation with a short wavelength IR laser. Thus, the AIEE sensitization system for quasi-2D PVK hybrid system can make a drastic improvement in performance as well as in the stability of the PVK emitter and PVK based nonlinear optical devices.
KW - aggregation-induced emission
KW - energy transfer
KW - nonlinear optics
KW - photoluminescence
KW - quasi-2D perovskites
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U2 - 10.1002/adfm.201909375
DO - 10.1002/adfm.201909375
M3 - Article
AN - SCOPUS:85080027404
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
ER -