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Slow Photons for Photocatalysis and Photovoltaics.

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Liu, Jing 
Zhao, Heng 
Wu, Min 
Van der Schueren, Benoit 
Li, Yu 

Abstract

Solar light is widely recognized as one of the most valuable renewable energy sources for the future. However, the development of solar-energy technologies is severely hindered by poor energy-conversion efficiencies due to low optical-absorption coefficients and low quantum-conversion yield of current-generation materials. Huge efforts have been devoted to investigating new strategies to improve the utilization of solar energy. Different chemical and physical strategies have been used to extend the spectral range or increase the conversion efficiency of materials, leading to very promising results. However, these methods have now begun to reach their limits. What is therefore the next big concept that could efficiently be used to enhance light harvesting? Despite its discovery many years ago, with the potential for becoming a powerful tool for enhanced light harvesting, the slow-photon effect, a manifestation of light-propagation control due to photonic structures, has largely been overlooked. This review presents theoretical as well as experimental progress on this effect, revealing that the photoreactivity of materials can be dramatically enhanced by exploiting slow photons. It is predicted that successful implementation of this strategy may open a very promising avenue for a broad spectrum of light-energy-conversion technologies.

Description

Keywords

photocatalysis, photonic crystals, photovoltaics, slow photons

Journal Title

Adv Mater

Conference Name

Journal ISSN

0935-9648
1521-4095

Volume Title

29

Publisher

Wiley
Sponsorship
This work was realized in the frame of a program for Changjiang Scholars and Innovative Research Team (IRT_15R52) of the Chinese Ministry of Education. B.V.d.S. acknowledges FRIA funding from the Fonds National de la Recherche Scientifique (FNRS). T.H. acknowledges support from a Royal Academy of Engineering Fellowship, B.L.S. acknowledges the Chinese Central Government for an “Expert of the State” position in the Program of the “Thousand Talents”, the Chinese Ministry of Education for a Changjiang Scholar position at the Wuhan University of Technology, a Clare Hall Life Membership, University of Cambridge. This work was also financially supported by National Natural Science Foundation of China (Grant No.51502225), the Fundamental Research Funds for the Central Universities (2013-YB-024, 2014-IV-057), Hubei Provincial Natural Science Foundation (2015CFB516), and Self-determined and Innovative Research Funds of the SKLWUT (2015-ZD-7) and International Science & Technology Cooperation Program of China (ISTC-2015DFE52870). G.A.O. is a Government of Canada Research Chair in Materials Chemistry and Nanochemistry. Financial support for this work was provided by the Ontario Ministry of Research Innovation (MRI); Ministry of Economic Development, Employment and Infrastructure (MEDI); Ministry of the Environment and Climate Change; Connaught Global Challenge Fund; Natural Sciences and Engineering Research Council of Canada (NSERC).