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Surface modification and fabrication of white‐light‐emitting Tm 3+ /CdS quantum dots co‐doped glass fibers
Author(s) -
Peng Zixing,
Huang Xiongjian,
Ma Zhijun,
Dong Guoping,
Qiu Jianrong
Publication year - 2019
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.16427
Subject(s) - materials science , borosilicate glass , quantum dot , doping , optoelectronics , luminescence , fiber , ion , optical fiber , absorption (acoustics) , optics , composite material , chemistry , physics , organic chemistry
Due to the widely tunable band gap and broadband excitation, CdS quantum dots (QDs) show great promise for yellow‐light luminescence center in white‐light‐emitting devices. The light intensity of the CdS QD‐doped glass was enhanced by doping the Tm 3+ ions due to the higher absorption rate. The influence of Tm 3+ ions on the surface structure of CdS QDs was enormous according to the first‐principles calculations. Doping Tm 3+ ions change the surface state of CdS QDs, which will fix the QDs emission peaks and enhance the luminescence of CdS QDs at a lower heat‐treatment temperature. White‐light emission was obtained by tuning the relative concentration between Tm 3+ /CdS QDs. However, there is a fundamental challenge to fabricate QD‐doped glass fibers by rod‐in‐tube method since uncontrollable QDs crystallization is hard to avoid. Herein, a white‐light‐emitting borosilicate glass fiber was fabricated by the “melt‐in‐tube” method using a special designed Tm 3+ /CdS QDs co‐doped borosilicate glass with low‐melting temperature as fiber core. After heat treatment, ideal white‐light emission was observed from the fiber under excitation at single wavelength (359 nm). This finding indicates that Tm 3+ /CdS QDs co‐doped glass fiber with white‐light‐emitting devices has potential application as gain medium of white‐light‐emitting sources and fiber lasers.