Kinetically controlled crystal growth approach to enhance triplet energy migration-based photon upconversion

Taku Ogawa, Nobuhiro Yanai, Hironori Kouno, Nobuo Kimizuka

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Improving efficiency of triplet-triplet annihilation-based photon upconversion (TTA-UC) in crystalline media is challenging because it usually suffers from the severe aggregation of the donor (sensitizer) molecules in acceptor (emitter) crystals. We show a kinetically controlled crystal growth approach to improve donor dispersibility in acceptor crystals. As the donor-acceptor combination, a benchmark pair of platinum(II) octaethylporphyrin (PtOEP) and 9,10-diphenylanthracene (DPA) is employed. A surfactant-assisted reprecipitation technique is employed, where the concentration of the injected PtOEP-DPA solution holds the key to control dispersibility; at a higher PtOEP-DPA concentration, a rapid crystal growth results in better dispersibility of PtOEP molecules in DPA crystals. The improvement of donor dispersibility significantly enhances the TTA-UC quantum yield. Thus, the inherent function of donor-doped acceptor crystals can be maximized by controlling the crystallization kinetics.

Original languageEnglish
Article number022003
JournalJournal of Photonics for Energy
Volume8
Issue number2
DOIs
Publication statusPublished - Apr 1 2018

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Crystal growth
crystal growth
Platinum
platinum
Photons
Crystals
photons
crystals
Molecules
Crystallization kinetics
energy
Quantum yield
molecules
emitters
Surface active agents
Agglomeration
surfactants
crystallization
Crystalline materials
kinetics

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Renewable Energy, Sustainability and the Environment

Cite this

Kinetically controlled crystal growth approach to enhance triplet energy migration-based photon upconversion. / Ogawa, Taku; Yanai, Nobuhiro; Kouno, Hironori; Kimizuka, Nobuo.

In: Journal of Photonics for Energy, Vol. 8, No. 2, 022003, 01.04.2018.

Research output: Contribution to journalArticle

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