Preparation and upconversion luminescence modification of YbPO4:Er3+ inverse opal heterostructure
来源期刊:JOURNAL OF RARE EARTHS2017年第12期
论文作者:Zhuangzhuang Chai Zhengwen Yang Anjun Huang Chengye Yu Jianbei Qiu Zhiguo Song
文章页码:1180 - 1185
摘 要:Photonic crystal heterostructures composed of YbPO4:Er3+ inverse opal and polystyrene opal were prepared via a template-assisted process, which exhibited two photonic band gaps. The microstructure,phase and optical properties of photonic crystal heterostructures were investigated by x-ray diffraction,scanning electron microscopy, fluorescence spectroscopy, absorption spectroscopy, fluorescence lifetime,etc. The upconversion emission suppression caused by single photonic band gap from the following YbPO4:Er3+ inverse opal or the upper opal was observed. The upconversion luminescence was strongly suppressed due to the two photonic band gap overlapping effect caused by the following YbPO4:Er3+ inverse opal or the upper opal. The modified mechanisms of upconversion luminescence were discussed by the upconversion luminescence lifetime of YbPO4:Er3+ photonic crystal heterostructures. The results demonstrated the modified upconversion luminescence is attributed to the photon trapping caused by Bragg reflection of photonic crystal heterostructures.
Zhuangzhuang Chai,Zhengwen Yang,Anjun Huang,Chengye Yu,Jianbei Qiu,Zhiguo Song
College of Materials Science and Engineering, Kunming University of Science and Technology
摘 要:Photonic crystal heterostructures composed of YbPO4:Er3+ inverse opal and polystyrene opal were prepared via a template-assisted process, which exhibited two photonic band gaps. The microstructure,phase and optical properties of photonic crystal heterostructures were investigated by x-ray diffraction,scanning electron microscopy, fluorescence spectroscopy, absorption spectroscopy, fluorescence lifetime,etc. The upconversion emission suppression caused by single photonic band gap from the following YbPO4:Er3+ inverse opal or the upper opal was observed. The upconversion luminescence was strongly suppressed due to the two photonic band gap overlapping effect caused by the following YbPO4:Er3+ inverse opal or the upper opal. The modified mechanisms of upconversion luminescence were discussed by the upconversion luminescence lifetime of YbPO4:Er3+ photonic crystal heterostructures. The results demonstrated the modified upconversion luminescence is attributed to the photon trapping caused by Bragg reflection of photonic crystal heterostructures.
关键词: