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 journalArticlepeer-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 languageEnglish
Pages (from-to)4558-4562
Number of pages5
JournalJournal of Materials Chemistry C
Volume10
Issue number12
DOIs
Publication statusPublished - Jan 10 2022

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency sensitized by a ketocoumarin derivative'. Together they form a unique fingerprint.

Cite this