Issue 65, 2018

Broadband ultraviolet to near infrared conversion in Eu2+,Nd3+ co-doped SrAl2O4

Abstract

In this study, we investigated the quantum cutting (QC) mechanism in Eu2+–Nd3-co-doped SrAl2O4 microcrystals by fluorescence spectroscopy and decay lifetime analysis. In this material, the near-infrared (NIR) emissions of Nd3+ in the range of 800–1200 nm were enhanced under the excitation of the Eu2+:4f7 → 4f65d1 transition radiation. The lifetime of the 5d1 level of Eu2+ decreased with the increase in the Nd3+ concentration. These results verified the occurrence of cooperative energy transfer (CET) from the Eu2+:5d1 excited state to the Nd3+:4F3/2 level, by which one absorbed ultraviolet-visible photon was converted to two NIR photons with an optimal quantum efficiency (QE) of approximately 177.1%. Therefore, this broadband QC material paves the way for a further increase in the conversion efficiency of c-Si solar cells.

Graphical abstract: Broadband ultraviolet to near infrared conversion in Eu2+,Nd3+ co-doped SrAl2O4

Article information

Article type
Paper
Submitted
23 Sep 2018
Accepted
31 Oct 2018
First published
07 Nov 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 37396-37400

Broadband ultraviolet to near infrared conversion in Eu2+,Nd3+ co-doped SrAl2O4

Y. Tai, B. Pan, X. Li, Z. Nie, X. Du and G. Yuan, RSC Adv., 2018, 8, 37396 DOI: 10.1039/C8RA07898J

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