Energy transfer process between Eu3＋ and wide-band-gap SnO2 nanocrystals in silica films studied by photoluminescence excitation and time-resolved photoluminescence techniques

• Published in: Chinese science bulletin Vol. 59; no. 12; pp. 1285 - 1290
• Main Authors: Zhang, Xiaowei, Zhang, Pei, Lin, Shaobing, Xu, Jun, Lin, Tao, Xu, Ling, Chen, Kunji
• Format: Journal Article
• Language: English
• Published: Heidelberg Science China Press 01.04.2014
• Subjects: Chemistry/Food Science; Earth Sciences; Engineering; Humanities and Social Sciences; Life Sciences; multidisciplinary; Physics; Science; Science (multidisciplinary); SnO2纳米晶; 光致发光激发光谱; 光谱技术; 时间分辨; 硅薄膜; 纳米晶体; 能量传递过程; 铕离子; Eu; Förster resonance energy transfer; ions; SnO; nanocrystals; Luminescence
• ISSN: 1001-6538; 1861-9541
• DOI: 10.1007/s11434-014-0168-y

Eu3＋ ions embedded in silica thin films co- doped with SnO2 nanocrystals were fabricated by sol-gel and spin-coating methods. SnO2 nanocrystals with con- trollable sizes were synthesized through precisely controlling the Sn concentrations. The influences of doping and annealing conditions on the photoluminescence intensity from SnO2 nanocrystals are systematically investigated. The effective energy transfer from the defect states of SnO2 nanocrystals to nearby Eu3＋ ions has revealed by the selective photoluminescence excitation spectra. The efficiency of the Forster resonance energy transfer is evaluated by the time-resolved photoluminescence measurements, which is about 29.1% based on the lifetime tests of the SnO2 emission.