Unusual anti-stokes photoluminescence from a polymer film containing thermally activated delayed fluorescent molecules

IF 2.8 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemical Physics Letters Pub Date : 2025-03-10 DOI:10.1016/j.cplett.2025.142017

Miwa Kaneko , Shintaro Kohata , Hajime Nakanotani , Chihaya Adachi

引用次数: 0

Abstract

Photon-upconversion (PUC) process based on hot-band absorption (HBA) mechanism is expected to be applied to future optical cooling because the thermal energy can be harvested as anti-Stokes photoluminescence (ASPL). Since the investigations regarding the HBA-ASPL in a solid state are limited, we focused on the ASPL properties in a polymethyl methacrylate-based film doped with a multi-resonance type thermally-activated delayed fluorescent emitter. The ASPL with a PL quantum yield of over 90 % was observed in the film. We found that the activation energy for the ASPL is almost three times higher than that for the HBA's absorbance in the solid state.

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来源期刊

Chemical Physics Letters 化学-物理：原子、分子和化学物理

CiteScore

5.70

自引率

3.60%

发文量

798

审稿时长

33 days

期刊介绍： Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage. Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.