Issue 24, 2023

Porous film impregnation method for record-efficiency visible-to-UV photon upconversion and subsolar light harvesting

Abstract

Photon upconversion from visible light to ultraviolet (UV) light is useful for various photochemical reactions such as artificial photosynthesis, but its efficiency is low under practical film conditions. Here, we demonstrate a film with a record-high visible-to-UV upconversion efficiency of 27.6% by simply soaking a porous film with a low-volatile upconversion solution. Furthermore, by combining this film with a microlens array, a significantly low threshold excitation light intensity of less than 0.60 mW cm−2, at least one order of magnitude lower than solar irradiance, is achieved.

Graphical abstract: Porous film impregnation method for record-efficiency visible-to-UV photon upconversion and subsolar light harvesting

Supplementary files

Article information

Article type
Communication
Submitted
19 jan 2023
Accepted
27 mar 2023
First published
28 mar 2023

J. Mater. Chem. C, 2023,11, 8002-8006

Author version available

Porous film impregnation method for record-efficiency visible-to-UV photon upconversion and subsolar light harvesting

N. Harada, M. Uji, B. Singh, N. Kimizuka and N. Yanai, J. Mater. Chem. C, 2023, 11, 8002 DOI: 10.1039/D3TC00236E

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