Near infrared-to-blue photon upconversion by exploiting direct S–T absorption of a molecular sensitizer

Triplet–triplet annihilation-based photon upconversion (TTA-UC) from NIR to blue light remains a great challenge. Here, we employ a direct singlet-to-triplet (S–T) excitation to circumvent an energy loss associated with the intersystem crossing (ISC) of triplet sensitizers. The TTA-UC based on the S...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 5; no. 21; pp. 5063 - 5067
Main Authors Sasaki, Yoichi, Amemori, Shogo, Kouno, Hironori, Yanai, Nobuhiro, Kimizuka, Nobuo
Format Journal Article
LanguageEnglish
Published 2017
Subjects
Absorption
Electronic devices
Excitation
Photons
Upconversion
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Summary:Triplet–triplet annihilation-based photon upconversion (TTA-UC) from NIR to blue light remains a great challenge. Here, we employ a direct singlet-to-triplet (S–T) excitation to circumvent an energy loss associated with the intersystem crossing (ISC) of triplet sensitizers. The TTA-UC based on the S–T absorption (STUC) allowed an efficient NIR ( λ = 724 nm)-to-blue ( λ = 462 nm) upconversion with a large anti-Stokes shift of 0.97 eV.
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ISSN:2050-7526
2050-7534
DOI:10.1039/C7TC00827A