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Title: Broadband Ce(III)-sensitized quantum cutting in core-shell nanoparticles : mechanistic investigation and photovoltaic application
Authors: Sun, TY
Chen, X
Jin, LM 
Li, HW
Chen, B
Fan, B
Moine, B
Qiao, XS
Fan, XP
Tsang, SW
Yu, SF 
Wang, F
Issue Date: 2017
Publisher: American Chemical Society
Source: Journal of physical chemistry letters, 2017, v. 8, no. 20, p. 5099-5104 How to cite?
Journal: Journal of physical chemistry letters 
Abstract: Quantum cutting in lanthanide-doped luminescent materials is promising for applications such as solar cells, mercury-free lamps, and plasma panel displays because of the ability to emit multiple photons for each absorbed higher-energy photon. Herein, a broadband Ce3+-sensitized quantum cutting process in Nd3+ ions is reported though gadolinium sublattice-mediated energy migration in a NaGdF4:Ce@NaGdF4:Nd@NaYF4 nanostructure. The Nd3+ ions show down conversion of one ultraviolet photon through two successive energy transitions, resulting in one visible photon and one near-infrared (NIR) photon. A class of NaGdF4:Ce@NaGdF4:Nd/Yb@NaYF4 nanoparticles is further developed to expand the spectrum of quantum cutting in the NIR When the quantum cutting nanoparticles are incorporated into a hybrid crystalline silicon (c-Si) solar cell, a 1.2-fold increase in short-circuit current and a 1.4-fold increase in power conversion efficiency is demonstrated under short-wavelength ultraviolet irradiation. These insights should enhance our ability to control and utilize spectral downconversion with lanthanide ions.
ISSN: 1948-7185
EISSN: 1948-7185
DOI: 10.1021/acs.jpclett.7b02245
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