Multi-color solar absorption as a synergetic UV up-conversion enhancement mechanism in LiYF 4 :Yb 3+ ,Tm 3+ nanocrystals - Archive ouverte HAL Access content directly
Journal Articles ACS photonics Year : 2019

Multi-color solar absorption as a synergetic UV up-conversion enhancement mechanism in LiYF 4 :Yb 3+ ,Tm 3+ nanocrystals

Abstract

Motivated by the technologically important spectral conversion of sunlight for efficient photocatalysis, we present a detailed analysis of the multi-color excitation of LiYF 4 :Yb 3+ ,Tm 3+ nanocrystals leading to UV emission through upconversion. We demonstrate in particular that the combination of blue and IR light for generating upconversion UV emission is a linear mechanism that occurs at rather low density of excitation (a few mW/cm 2). This up-conversion efficiency is fully compatible with 1
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Dates and versions

hal-02393052 , version 1 (04-12-2019)

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Bhagyesh Purohit, Yannick Guyot, David Amans, Marie-France Joubert, Benoit Mahler, et al.. Multi-color solar absorption as a synergetic UV up-conversion enhancement mechanism in LiYF 4 :Yb 3+ ,Tm 3+ nanocrystals. ACS photonics, 2019, 6 (12), pp.3126-3131. ⟨10.1021/acsphotonics.9b01151⟩. ⟨hal-02393052⟩
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