Near-infrared quantum-cutting emission in Ho3+/Yb3+ co-doped NaY (WO4)2 phosphors

被引：1

作者：

Gao, Duan ^{[1
]}

Liu, Shengyi ^{[2
]}

Zhang, Xizhen ^{[1
]}

Zhang, Jinsu ^{[1
]}

Xu, Sai ^{[1
]}

Li, Xiangping ^{[1
]}

Cao, Yongze ^{[1
]}

Wang, Yichao ^{[1
]}

Yu, Hongquan ^{[1
]}

Zhang, Yuhang ^{[1
]}

Sha, Xuezhu ^{[1
]}

Wang, Li ^{[1
]}

Chen, Xin ^{[1
]}

Chen, Baojiu ^{[1
]}

机构：

[1] Dalian Maritime Univ, Sch Sci, Dalian 116026, Liaoning, Peoples R China

[2] Dalian Neusoft Univ Informat, Sch Intelligent & Elect Engn, Dalian 116026, Liaoning, Peoples R China

来源：

OPTICAL MATERIALS | 2024年 / 157卷

关键词：

Silicon-based solar cells; Quantum cutting; Cross-relaxation; Self-quenching; HO3+;

D O I：

10.1016/j.optmat.2024.116155

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Enhancing the efficiency of photoelectric conversion is a vital consideration for silicon-based solar cells via introducing near-infrared emitting material. In this study, efficient Yb3+ near infrared emissions through quantum cutting was achieved by adjusting the concentrations of Ho3+ and Yb3+. The quantum cutting mechanism was detailedly investigated and a two-step energy transfer processes from Ho3+ to Yb3+ were assigned to be responsible for the near infrared emission of Yb3+. The radiative and nonradiative transition rates of all concerned 4f levels of Ho3+ in NaY(WO4)(2) (abbreviations as NYW) matrix were derived based on the Judd-Ofelt theory and the energy gap law. The energy transfer rates from Ho3+ to Yb3+ were also obtained by analyzing the fluorescence dynamics. Furthermore, the quantum cutting efficiencies were determined to be 60.46 %. It was revealed that the low quantum-cutting efficiencies resulted from the nonradiative transitions of Ho3+ and the self-quenching of Yb3+ at higher doping concentration of Yb3+.

引用

页数：9

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