Please use this identifier to cite or link to this item:
Title: Layered Hybrid Perovskites for Highly Efficient Three-Photon Absorbers: Theory and Experimental Observation
Authors: Lu S.
Zhou F. 
Zhang Q. 
Eda G. 
Ji W. 
Keywords: Energy efficiency
Nonlinear optics
Perturbation techniques
Multi-photon absorption
Photocurrent generations
Quantum perturbation theory
Semiconducting materials
Simultaneous absorption
Technological applications
Three-photon absorption (3PA)
Multiphoton processes
Issue Date: 2019
Citation: Lu S., Zhou F., Zhang Q., Eda G., Ji W. (2019). Layered Hybrid Perovskites for Highly Efficient Three-Photon Absorbers: Theory and Experimental Observation. Advanced Science 6 (4) : 1801626. ScholarBank@NUS Repository.
Abstract: Multiphoton absorption may find many technological applications, such as enhancing the conversion efficiency of solar cells by the utilization of sub-band-energy photons, below-bandgap photodetection through the simultaneous absorption of several infrared photons for photocurrent generation, or light frequency upconversion for high-resolution, 3D imaging. To enhance multiphoton absorption in semiconducting materials, one of the strategies is to explore low-dimensional excitons. Here, a quantum perturbation theory on a giant enhancement in three-photon absorption (3PA) arising from 2D excitons in multilayered crystals of organic–inorganic hybrid perovskites is presented. The maximal 3PA coefficient is predicted to be in the range of 2–7 cm 3 GW −2 at 1100 nm, the largest values reported so far for any 2D and bulk semiconductors at room temperature. Excellent agreement between theory and the experimental findings unambiguously demonstrates a pivotal role in the enhancement of 3PA played by 2D excitons. The theory predicts that the resonant 3PA coefficient should be enhanced further by at least two orders of magnitude with very low temperature. The findings are essential for understanding giant 3PA arising from 2D excitons in layered hybrid perovskites and may open new pathways for highly efficient conversion from infrared light energy to either electrical energy or higher-frequency light emission/lasing. © 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Source Title: Advanced Science
ISSN: 2198-3844
DOI: 10.1002/advs.201801626
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
10_1002_advs_201801626.pdf1.17 MBAdobe PDF



Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.