Efficient near–infrared down conversion by two–step energy transfer from Pr3+ to Yb3+ in transparent nanostructured glass ceramics
| Autor: | Bingli Pan, Guanghui Yuan, Xigang Du, Xinzhong Li, Yuping Tai, Hanying Wang |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Photon Photoluminescence Silicon business.industry General Chemical Engineering Physics::Optics General Physics and Astronomy chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences Ion Nanocrystal chemistry visual_art 0103 physical sciences visual_art.visual_art_medium Optoelectronics Quantum efficiency Ceramic 0210 nano-technology business Excitation |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 360:64-70 |
| ISSN: | 1010-6030 |
| Popis: | Pr3+–Yb3+ co–doped transparent glass ceramics containing CaF2 nanocrystals were synthesized by a conventional melt–quenching method. Down conversion involving emission of two near–infrared photons for each visible photon absorbed was achieved in the Pr3+–Yb3+ co–doped transparent glass ceramics. Upon excitation of the Pr3+ ions with a blue–light photon at 448 nm, Yb3+ ions emitted two near–infrared photons at 980 nm through an efficient two–step energy transfer process from Pr3+ to Yb3+. The mechanism of the energy transfer was certified by measurement of the photoluminescence spectra and decay curves, with an optimal quantum efficiency of 171.1%. The development of near–infrared down conversion transparent glass ceramics leads to a potential application in increasing the efficiency of silicon–based solar cells. |
| Databáze: | OpenAIRE |
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