Highly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method

Abstract Er3+/Yb3+ co-doped Na5Lu9F32 single crystals with different concentrations of Yb3+ ions were prepared to investigate their phase structure, up-conversion (UC) properties and mechanism of UC luminescence by Bridgman method. Under 980 nm near-infrared (NIR) excitation, three sharp UC emission...

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Autores principales:	Shinan He, Haiping Xia, Jianli Zhang, Yongsheng Zhu, Baojiu Chen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c38a5661fcad45daa071df4b973fa341
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spelling	oai:doaj.org-article:c38a5661fcad45daa071df4b973fa3412021-12-02T16:06:30ZHighly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method10.1038/s41598-017-09222-02045-2322https://doaj.org/article/c38a5661fcad45daa071df4b973fa3412017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09222-0https://doaj.org/toc/2045-2322Abstract Er3+/Yb3+ co-doped Na5Lu9F32 single crystals with different concentrations of Yb3+ ions were prepared to investigate their phase structure, up-conversion (UC) properties and mechanism of UC luminescence by Bridgman method. Under 980 nm near-infrared (NIR) excitation, three sharp UC emission bands topping at green ~525 nm, ~548 nm and red ~669 nm were obtained in Er3+/Yb3+ doped Na5Lu9F32 single crystals which are attributing to the transitions of 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2, respectively. The quadratic dependence of pump power on UC emission indicated that two-photon process is in charge of the transition from excited state of Yb3+ ions to lower state of Er3+ ion in Na5Lu9F32 single crystals. The long-accepted mechanism for the production of red and green emissions through up-conversion (UC) under 980 nm excitation in Er3+/Yb3+ co-doped materials apply in the Na5Lu9F32 host was displayed. The enhancement of the red emission was observed due to a cross-relaxation (CR) process of the form: 4F7/2 + 4I11/2 → 4F9/2 + 4F9/2. Furthermore, an ideal yellowish green light performance could be achieved with 1.0 mol% Er3+ doped certain Yb3+ concentrations samples, and its external quantum efficiency approached to 6.80% under 5.5 Wcm−2 980 nm excitation which can be applied in developing UC displays for electro-optical devices.Shinan HeHaiping XiaJianli ZhangYongsheng ZhuBaojiu ChenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shinan He Haiping Xia Jianli Zhang Yongsheng Zhu Baojiu Chen Highly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method
description	Abstract Er3+/Yb3+ co-doped Na5Lu9F32 single crystals with different concentrations of Yb3+ ions were prepared to investigate their phase structure, up-conversion (UC) properties and mechanism of UC luminescence by Bridgman method. Under 980 nm near-infrared (NIR) excitation, three sharp UC emission bands topping at green ~525 nm, ~548 nm and red ~669 nm were obtained in Er3+/Yb3+ doped Na5Lu9F32 single crystals which are attributing to the transitions of 2H11/2 → 4I15/2, 4S3/2 → 4I15/2 and 4F9/2 → 4I15/2, respectively. The quadratic dependence of pump power on UC emission indicated that two-photon process is in charge of the transition from excited state of Yb3+ ions to lower state of Er3+ ion in Na5Lu9F32 single crystals. The long-accepted mechanism for the production of red and green emissions through up-conversion (UC) under 980 nm excitation in Er3+/Yb3+ co-doped materials apply in the Na5Lu9F32 host was displayed. The enhancement of the red emission was observed due to a cross-relaxation (CR) process of the form: 4F7/2 + 4I11/2 → 4F9/2 + 4F9/2. Furthermore, an ideal yellowish green light performance could be achieved with 1.0 mol% Er3+ doped certain Yb3+ concentrations samples, and its external quantum efficiency approached to 6.80% under 5.5 Wcm−2 980 nm excitation which can be applied in developing UC displays for electro-optical devices.
format	article
author	Shinan He Haiping Xia Jianli Zhang Yongsheng Zhu Baojiu Chen
author_facet	Shinan He Haiping Xia Jianli Zhang Yongsheng Zhu Baojiu Chen
author_sort	Shinan He
title	Highly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method
title_short	Highly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method
title_full	Highly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method
title_fullStr	Highly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method
title_full_unstemmed	Highly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method
title_sort	highly efficient up-conversion luminescence in er3+/yb3+ co-doped na5lu9f32 single crystals by vertical bridgman method
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c38a5661fcad45daa071df4b973fa341
work_keys_str_mv	AT shinanhe highlyefficientupconversionluminescenceiner3yb3codopedna5lu9f32singlecrystalsbyverticalbridgmanmethod AT haipingxia highlyefficientupconversionluminescenceiner3yb3codopedna5lu9f32singlecrystalsbyverticalbridgmanmethod AT jianlizhang highlyefficientupconversionluminescenceiner3yb3codopedna5lu9f32singlecrystalsbyverticalbridgmanmethod AT yongshengzhu highlyefficientupconversionluminescenceiner3yb3codopedna5lu9f32singlecrystalsbyverticalbridgmanmethod AT baojiuchen highlyefficientupconversionluminescenceiner3yb3codopedna5lu9f32singlecrystalsbyverticalbridgmanmethod
_version_	1718384987680538624

Highly efficient up-conversion luminescence in Er3+/Yb3+ co-doped Na5Lu9F32 single crystals by vertical Bridgman method

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