The rare earth berate YBO3 synthesized by sol-gel technique was found to be in two phases. However, the low-svmmetry form of YBO3 which was found also in some other rare earth (Sm, Eu, Gd) berates has a much different...The rare earth berate YBO3 synthesized by sol-gel technique was found to be in two phases. However, the low-svmmetry form of YBO3 which was found also in some other rare earth (Sm, Eu, Gd) berates has a much different dependence on the preparing conditions, The photoluminescent spectra indicate that there are more than two sites for Eu3+ in the sol-gel prepared polycrystalline YBO3:Eu with low-symmetry.展开更多
Flower-like YBO3∶Eu3+ thin films were prepared on the AAO template by a hydrothermal method and the effects of some processing variables, such as temperature and calcinated time, were investigated. The formation of Y...Flower-like YBO3∶Eu3+ thin films were prepared on the AAO template by a hydrothermal method and the effects of some processing variables, such as temperature and calcinated time, were investigated. The formation of YBO3∶Eu3+ thin films were confirmed by EDX, XRD and PL spectra. The PL spectra show that the characteristic emission of the YBO3∶Eu3+/AAO thin film is the 5D0 →7F1 transition.展开更多
Y1-xEuxBO3 nanophosphors were synthesized by a modified co-precipitation method. The structure of the obtained nanocrystals was determined by X-ray diffraction （XRD） and transmission electron microscopy （TEM）. The...Y1-xEuxBO3 nanophosphors were synthesized by a modified co-precipitation method. The structure of the obtained nanocrystals was determined by X-ray diffraction （XRD） and transmission electron microscopy （TEM）. The average crystallite size was calculated from the full-width at half-maximum （FWHM） of the diffraction peaks by the Scherrer equation. The average particles size was 25±10 nm. The spectroscopic properties of the Y1-xEuxBO3 nanoborates were characterized by excitation and emission spectra under UV and VUV excitation. In order to improve colour purity, the chromaticity coordinates were also calculated.展开更多
文摘The rare earth berate YBO3 synthesized by sol-gel technique was found to be in two phases. However, the low-svmmetry form of YBO3 which was found also in some other rare earth (Sm, Eu, Gd) berates has a much different dependence on the preparing conditions, The photoluminescent spectra indicate that there are more than two sites for Eu3+ in the sol-gel prepared polycrystalline YBO3:Eu with low-symmetry.
文摘Flower-like YBO3∶Eu3+ thin films were prepared on the AAO template by a hydrothermal method and the effects of some processing variables, such as temperature and calcinated time, were investigated. The formation of YBO3∶Eu3+ thin films were confirmed by EDX, XRD and PL spectra. The PL spectra show that the characteristic emission of the YBO3∶Eu3+/AAO thin film is the 5D0 →7F1 transition.
基金Project supported by the Polish Ministry of Science and Higher Education (N N204 089838)the Estonian Science Foundation (grant 8893)the European Community Research Infrastructure Action under the FP6 Structuring the European Research Area Programme (through the Integrated Infrastructure Initiative Integrating Activity on Synchrotron and Free Electron Laser Science)
文摘Y1-xEuxBO3 nanophosphors were synthesized by a modified co-precipitation method. The structure of the obtained nanocrystals was determined by X-ray diffraction （XRD） and transmission electron microscopy （TEM）. The average crystallite size was calculated from the full-width at half-maximum （FWHM） of the diffraction peaks by the Scherrer equation. The average particles size was 25±10 nm. The spectroscopic properties of the Y1-xEuxBO3 nanoborates were characterized by excitation and emission spectra under UV and VUV excitation. In order to improve colour purity, the chromaticity coordinates were also calculated.
基金Supported by the National Natural Science Foundation of China(11174004)the Natural Science Key Foundation of Education Department of Anhui Province(KJ2010A012)the Open Foundation of Anhui Key Laboratory of Information Materials and Devices,the "211Project" of Anhui University
基金National Natural Science Foundation of China under Grant(21401210)Qinghai International Cooperation Projects under Grant(2012-H-813,2014-HZ-818)Chinese Academy of Sciences"Western Light"Talent Cultivation Plan"Joint Scholars"Project
