期刊
OPTICAL MATERIALS EXPRESS
卷 6, 期 5, 页码 1664-1678出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.6.001664
关键词
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资金
- Danish Strategic Research Council under the project named Thin-film solar cell based on nanocrystalline silicon and structured backside reflectorsTHINC
- project CICECO Aveiro Institute of Materials [FCT UID/CTM/50011/2013]
- Portuguese funds through FCT/MEC
- FEDER under the PT2020 Partnership Agreement
This work presents a study of the luminescence properties of Er3+ when included into two different TiO2 hosts: a polycrystalline and an amorphous host. The two host environments were produced by depositing two thin films with different Er3+ concentration using radio-frequency magnetron sputtering. Structural analysis revealed the presence of the rutile and anatase phases in the polycrystalline film. Time-resolved and steady-state photoluminescence measurements evidenced the presence of two distinct local Er3+ environments in the polycrystalline host. For the amorphous TiO2 host, only one Er3+ environment was observed, which differed from the two environments in the polycrystalline host. A method for extracting a fast and slow time-resolved emission spectrum from the two observed local environments in the polycrystalline host is also presented. (C) 2016 Optical Society of America
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