TY - JOUR
T1 - Solvent Modulation of Chiral Perovskite Films Enables High Circularly Polarized Luminescence Performance from Chiral Perovskite/Quantum Dot Composites
AU - Zhu, Hongmei
AU - Wang, Qingqian
AU - Sun, Kun
AU - Chen, Wei
AU - Tang, Jun
AU - Hao, Junjie
AU - Wang, Zhaojin
AU - Sun, Jiayun
AU - Choy, Wallace C.H.
AU - Müller-Buschbaum, Peter
AU - Sun, Xiao Wei
AU - Wu, Dan
AU - Wang, Kai
N1 - Publisher Copyright:
© 2023 American Chemical Society.
PY - 2023/2/22
Y1 - 2023/2/22
N2 - Materials with circularly polarized luminescence (CPL) activity are promising in many chiroptoelectronics fields, such as for biological probes, asymmetric photosynthesis, information storage, spintronic devices, and so on. Promoting the value of the dissymmetry factor (glum) for the CPL-active materials based on chiral perovskite draws increasing attention since a higher glum value indicates better CPL. In this work, we find that, after being treated with a facile solvent modulation strategy, the chirality of 2D chiral perovskite films has been enhanced a lot, which we attribute to an increased lattice distortion degree. By forming chiral perovskite/quantum dot (QD) composites, the CPL-active material is successfully obtained. The calculated maximum |glum| of these composites increased over 4 times after solvent modulation treatment (1.53 × 10-3 for the pristine sample of R-DMF and 6.91 × 10-3 for R-NMP) at room temperature. Moreover, the enhancement of the CPL intensity is ascribed to two aspects: one is the generation and transportation of spin-polarized charge carriers from chiral perovskite films to combine in the QD layer, and the other is the solvent modulation strategy to enlarge the lattice distortion of chiral perovskite films. This facile route provides an effective way to construct CPL-active materials. More importantly, this kind of composite material (chiral perovskite film/QD layer) can be easily applied for fabricating circularly polarized light-emitting diode devices for electroluminescence.
AB - Materials with circularly polarized luminescence (CPL) activity are promising in many chiroptoelectronics fields, such as for biological probes, asymmetric photosynthesis, information storage, spintronic devices, and so on. Promoting the value of the dissymmetry factor (glum) for the CPL-active materials based on chiral perovskite draws increasing attention since a higher glum value indicates better CPL. In this work, we find that, after being treated with a facile solvent modulation strategy, the chirality of 2D chiral perovskite films has been enhanced a lot, which we attribute to an increased lattice distortion degree. By forming chiral perovskite/quantum dot (QD) composites, the CPL-active material is successfully obtained. The calculated maximum |glum| of these composites increased over 4 times after solvent modulation treatment (1.53 × 10-3 for the pristine sample of R-DMF and 6.91 × 10-3 for R-NMP) at room temperature. Moreover, the enhancement of the CPL intensity is ascribed to two aspects: one is the generation and transportation of spin-polarized charge carriers from chiral perovskite films to combine in the QD layer, and the other is the solvent modulation strategy to enlarge the lattice distortion of chiral perovskite films. This facile route provides an effective way to construct CPL-active materials. More importantly, this kind of composite material (chiral perovskite film/QD layer) can be easily applied for fabricating circularly polarized light-emitting diode devices for electroluminescence.
KW - CPL-active materials
KW - chiral perovskite/QD composites
KW - chirality
KW - g
KW - high circularly polarized luminescence
KW - solvent modulation
UR - http://www.scopus.com/inward/record.url?scp=85147822658&partnerID=8YFLogxK
U2 - 10.1021/acsami.2c20716
DO - 10.1021/acsami.2c20716
M3 - Article
AN - SCOPUS:85147822658
SN - 1944-8244
VL - 15
SP - 9978
EP - 9986
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 7
ER -