Issue 1, 2017
From the journal:

Materials Horizons

Efficient triplet–triplet annihilation upconversion in binary crystalline solids fabricated via solution casting and operated in air†

Kenji Kamada,*ab   Yusuke Sakagami,ab   Toshiko Mizokuro,a   Yutaka Fujiwara,c   Kenji Kobayashi,*c   Kaishi Narushima,d   Shuzo Hiratad  and  Martin Vachad  

* Corresponding authors

a IFMRI, National Institute of Advanced Industrial Science and Technology (AIST), Ikeda, Osaka 563-8577, Japan
E-mail: k.kamada@aist.go.jp

b Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan

c Department of Chemistry, Faculty of Science, Shizuoka University, Shizuoka 422-8529, Japan
E-mail: kobayashi.kenji.a@shizuoka.ac.jp

d Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan

Abstract

Binary crystalline solids consisting of a sensitizer (Pt-octaethylporphyrin) and an emitter (9,10-diphenylanthracene (DPA) or its alkyl-strapped derivative (C7-sDPA)) were fabricated by solution casting under rapid drying conditions and found to show efficient triplet–triplet annihilation upconversion by the suppression of component segregation. Microspectroscopic studies of individual crystalline particles of the binary solids revealed threshold intensities as low as 5 mW cm−2, close to solar levels, and UC quantum yields of 20% were possible when using C7-sDPA as an emitter, even in air.

Graphical abstract: Efficient triplet–triplet annihilation upconversion in binary crystalline solids fabricated via solution casting and operated in air

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Article information

DOI
https://doi.org/10.1039/C6MH00413J
Article type
Communication
Submitted
11 Oct 2016
Accepted
19 Oct 2016
First published
19 Oct 2016
This article is Open Access
Creative Commons BY license

Mater. Horiz., 2017,4, 83-87

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Efficient triplet–triplet annihilation upconversion in binary crystalline solids fabricated via solution casting and operated in air

K. Kamada, Y. Sakagami, T. Mizokuro, Y. Fujiwara, K. Kobayashi, K. Narushima, S. Hirata and M. Vacha, Mater. Horiz., 2017, 4, 83 DOI: 10.1039/C6MH00413J

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