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Near‐Infrared Quantum Cutting via Downconversion Energy Transfers in Ho 3+ / Yb 3+ Codoped Tellurite Glass Ceramics
Author(s) -
Zhou Xianju,
Wang Yongjie,
Zhao Xiaoqi,
Li Li,
Wang Zhongqing,
Li Qingxu
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12679
Subject(s) - quantum efficiency , ion , infrared , silicon , materials science , doping , analytical chemistry (journal) , ytterbium , quenching (fluorescence) , ultraviolet , relaxation (psychology) , fluorescence , chemistry , optoelectronics , optics , physics , psychology , social psychology , organic chemistry , chromatography
The different concentration of Ho 3+ / Yb 3+ codoped tellurite glasses were prepared by high‐temperature melting‐quenching method. On excitation of Ho 3+ ions with blue photon at 449 nm as well as ultraviolet ( UV ) photon at 360 nm, the near infrared emission at 977 nm from Yb 3+ and 981, 1020 nm from Ho 3+ , which could be absorbed by silicon and enhance the efficiency of the silicon‐based solar cell, were observed. The energy‐transfer process of Ho 3+ and Yb 3+ ions and involved mechanism have been investigated and discussed. The first‐order energy transfer ( ET ) through cross relaxation and a back ET from Yb 3+ to Ho 3+ occurred in the near‐infrared quantum cutting ( NIR QC ) system are proposed and verified. The NIR quantum efficiency achieved 166% when Yb 3+ doping concentration is 20 mol%.
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