Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative

Masanori Uji; Naoyuki Harada; Nobuo Kimizuka; Masaki Saigo; Kiyoshi Miyata; Ken Onda; Nobuhiro Yanai

doi:10.1039/d1tc05526g

Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative

Masanori Uji, Naoyuki Harada, Nobuo Kimizuka, Masaki Saigo, Kiyoshi Miyata, Ken Onda, Nobuhiro Yanai

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	4558-4562
Number of pages	5
Journal	Journal of Materials Chemistry C
Volume	10
Issue number	12
DOIs	https://doi.org/10.1039/d1tc05526g
Publication status	Published - Jan 10 2022

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Chemistry

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title = "Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative",

abstract = "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.",

author = "Masanori Uji and Naoyuki Harada and Nobuo Kimizuka and Masaki Saigo and Kiyoshi Miyata and Ken Onda and Nobuhiro Yanai",

note = "Funding Information: This work was partly supported by JSPS KAKENHI (grant numbers JP20H02713, JP20K21211, JP20H05676, JP21J21739), GAP NEXT program, KYUTEC research and development grant, and the Innovation inspired by Nature Program of Sekisui Chemical Co. Ltd. Publisher Copyright: {\textcopyright} 2022 The Royal Society of Chemistry",

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doi = "10.1039/d1tc05526g",

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T1 - Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative

AU - Uji, Masanori

AU - Harada, Naoyuki

AU - Kimizuka, Nobuo

AU - Saigo, Masaki

AU - Miyata, Kiyoshi

AU - Onda, Ken

AU - Yanai, Nobuhiro

N1 - Funding Information: This work was partly supported by JSPS KAKENHI (grant numbers JP20H02713, JP20K21211, JP20H05676, JP21J21739), GAP NEXT program, KYUTEC research and development grant, and the Innovation inspired by Nature Program of Sekisui Chemical Co. Ltd. Publisher Copyright: © 2022 The Royal Society of Chemistry

PY - 2022/1/10

Y1 - 2022/1/10

N2 - 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.

AB - 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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Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative

Abstract

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