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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

PHOTON UPCONVERSION BASED ON MOLECULAR SCALE ENERGY AND MASS TRANSFER: MATERIALS DEVELOPMENT, MICROSCOPIC KINETICS, AND PHOTOPHYSICAL PROPERTIES

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpe.024412
pages 6135-6142

Abstract

Photon upconversion (UC) conducts conversion of low energy photons that are presently wasted in broad photoenergy conversion systems to usable higher energy photons. Thus, UC provides a fundamental solution to increase the efficiencies of broad photoenergy conversion systems. Recently, a method of UC, called TTA-UC, that uses excited triplet states of organic molecules and intermolecular energy transfers between them has emerged. TTA-UC is presently the only method applicable to weak and non-coherent light such as sunlight. Although the research area of TTA-UC has grown in a past decade, TTA-UC still suffers from either the high cost or insufficient stability/safety of materials used; resolutions of these problems are required for application. To resolve these problems, our research group has been conducting studies on this technological subject from the various aspects including materials developments, microscopic kinetics, and photophysical properties. In this paper, achievements thus far obtained by our group are presented. Several important or unique properties of the developed samples are also presented.