Room-Temperature Phosphorescence of Pyrene Using Perovskite as a Triplet-Sensitizing Matrix and Oxygen Barrier
Year: 2025
Type: article
Abstract: To realize the formation and transfer of triplet excited states in hybrid organic-inorganic materials, material designs that facilitate efficient triplet sensitization and suppress molecular excited-state deactivation are imperative. In this study, we demonstrated the efficient formation of molecular triplet excited states via through-space triplet energy transfer (TET) in a perovskite nanocrystal (PNC)─pyrene (Py)─composite film. Uniform dispersion of Py as an organic acceptor within the PNC matrix facilitated effective TET, enabling room-temperature Py phosphorescence emission with an average lifetime of 60.7 ms. The TET process exhibited an efficiency of 22%, and the oxygen barrier properties of the PNC matrix suppressed oxygen quenching, allowing retention of Py phosphorescence even under ambient conditions. The proposed simple and effective material design strategy for extending the functionalities of organic acceptor molecules through controlled interface interactions can be applied in triplet-triplet annihilation upconversion and photocatalysis.
Authors: Hinako Ebe, Shusei Hattori, Mizuki Ohke, Junpei Igarashi, Aoi Hamatsu, Mai Anbe, Matthew L. Atteberry, Yitong Dong, Madalina Furis, Mamoru Kitaura, Jun Matsui
Institutions: Yamagata University, University of Oklahoma
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Awards: G1698999443, G2042226615, Development of High-Performance Perovskite Crystals Using Charge-Transfer Complexes as Function-Enhancing Ligands, 電荷移動錯体およびペロブスカイトナノ結晶を用いた複合型光機能材料の創出, Fabrication of Charge-transfer Complex-Perovskite Composite Films, PIRE: US-Japan Partnership in Excitonic Soft Materials for Clean Energy, G4202954735, G4222765392, G5256005533, G5566134501, G5855284817, G924938467
OpenAlex ID: W4417046355