Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 10, Issue 12, Pages -Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc05526g
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Funding
- JSPS KAKENHI [JP20H02713, JP20K21211, JP20H05676, JP21J21739]
- GAP NEXT program
- KYUTEC research and development grant
- Innovation inspired by Nature Program of Sekisui Chemical Co. Ltd.
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Efficient triplet-triplet annihilation-based photon upconversion (TTA-UC) from visible to UV light without using heavy metals is achieved by employing a ketocoumarin derivative as a triplet sensitizer, which shows strong visible absorption, weak UV absorption, and efficient intersystem crossing, leading to a record-high TTA-UC efficiency of 20.3% among 100% maximum.
Efficient triplet-triplet annihilation-based photon upconversion (TTA-UC) from visible to UV light without using heavy metals is still a challenging task. Here we achieve a record-high TTA-UC efficiency of 20.3% among 100% maximum by employing a ketocoumarin derivative as a triplet sensitizer, which shows strong visible absorption, weak UV absorption, and efficient intersystem crossing.
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