Sandwich-structured TiO2 inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency

Eftekhari, E, Broisson, P, Aravindakshan, N, Wu, Z, Cole, I, Li, X, Zhao, D and Li, Q 2017, 'Sandwich-structured TiO2 inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency', Journal of Materials Chemistry A, vol. 5, no. 25, pp. 12803-12810.


Document type: Journal Article
Collection: Journal Articles

Title Sandwich-structured TiO2 inverse opal circulates slow photons for tremendous improvement in solar energy conversion efficiency
Author(s) Eftekhari, E
Broisson, P
Aravindakshan, N
Wu, Z
Cole, I
Li, X
Zhao, D
Li, Q
Year 2017
Journal name Journal of Materials Chemistry A
Volume number 5
Issue number 25
Start page 12803
End page 12810
Total pages 8
Publisher Royal Society of Chemistry
Abstract Photon management has enabled a true revolution in the development of high-performance semiconductor materials and devices. Harnessing the highest amount of energy from photons relies on the ability to design and fashion structures to trap the light for a longer time inside the device for more electron excitation. The light harvesting efficiency in many thin-film optoelectronic devices is limited due to low photon absorbance. Here we demonstrate for the first time that slow photon circulation in sandwich-structured photonic crystals with two stopbands fine tuned is ideally suited to enhance and spectrally engineer light absorption. The sandwich-structured TiO 2 inverse opal possesses two stopbands, whose blue or red edge is respectively tuned to overlap with the electronic excitation energy of TiO 2 , thereby circulating the slow photons in the middle layer and enhancing light scattering at layer interfaces. This concept, together with the significantly increased control over photon management opens up tremendous opportunities for the realization of a wide range of high-performance, optoelectronic devices, and photochemical reactions.
Subject Nanomaterials
Keyword(s) Electron excitations
Electronic excitation energy
High-performance semiconductors
Inverse opal
Layer interfaces
Light-harvesting
Photon management
Slow photons
DOI - identifier 10.1039/c7ta01703k
Copyright notice © 2017 The Royal Society of Chemistry.
ISSN 2050-7488
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in Thomson Reuters Web of Science Article
Scopus Citation Count Cited 0 times in Scopus Article
Altmetric details:
Access Statistics: 14 Abstract Views  -  Detailed Statistics
Created: Wed, 13 Sep 2017, 13:17:00 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us