[14a-K209-1~11] 1.4 Energy conversion, storage, resources and environment

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[14a-K209-1] Influence of molecular orientation and exciton hopping rates on triplet-triplet annihilation energy upconversion in solid-state systems

〇Kuniyuki Miwa^1,2, Tsubasa Okamoto^3,4, Yasuhiro Kobori^3,4,5, Akihito Ishizaki^1,6 (1.IMS, 2.SOKENDAI, 3.Molecular Photoscience Research Center, Kobe Univ., 4.Dept. of Chem., Kobe Univ., 5.JST-CREST, 6.Dept. of Chem., Univ. of Tokyo)

Keywords:

Triplet-triplet annihilation,Energy upconversion

Energy upconversion via triplet-triplet annihilation (TTA-UC) has garnered significant attention for its potential applications to enhance the performance of optoelectronic devices, such as solar cells and light-emitting diodes. In this study, we investigated the dependence of TTA-UC efficiency on molecular orientation and the transition rate between different configuration of molecules hosting triplet exciton pairs induced by exciton hopping between molecules. The insights gained from this study will contribute to deepen our understanding of molecular spin-state interconversion in solid-state systems and its impact on the TTA-UC efficiency.