Color tunable and white light emitting via energy transfer in single-phase BiOCl:Er3+,Sm3+ phosphors for WLEDs
来源期刊：JOURNAL OF RARE EARTHS2018年第3期
论文作者：Xiangzhou Zhang Yongjin Li Rui Hu Zuyuan Xu Jianbei Qiu Zhengwen Yang Zhiguo Song
文章页码：231 - 237
摘 要：BiOCl crystal shows potential as efficient optical host due to its special layered structure. Here,the luminescence properties of the Er3+/Sm3+ co-doped BiOCl phosphors as single-phase phosphors were reported. Upon near ultraviolet excitation(NUV, 380 nm corresponding the 4 I15/2→ 4 G11/2 transition of Er3+ ions), the phosphors exhibit the efficient characteristic emissions of Er3+ and Sm3+ ions simultaneously. The energy transfer（ET） from Er3+ to Sm3+ ions in the layered crystals has been validated by the variation of emission intensities and decay lifetimes respectively, which is ascribed to be a dipoledipole interaction. By virtue of the ET behavior and increasing Sm3+ ion concentration, the enhancing emission intensity of Sm3+ and the tunability of emission color from yellowish-green（0.318, 0.420） to white（0.343, 0.347） are realized. The results of our work indicate that the Er3+/Sm3+ co-doped BiOCI phosphor has a promising application serving as single component white emitting phosphors for NUV excited WLEDs.
Xiangzhou Zhang1，Yongjin Li2，Rui Hu1，Zuyuan Xu1，Jianbei Qiu1，Zhengwen Yang1，Zhiguo Song1
1. School of Materials Science and Engineering,Kunming University of Science and Technology2. School of Materials Science and Engineering,Sun Yat-sen University
摘 要：BiOCl crystal shows potential as efficient optical host due to its special layered structure. Here,the luminescence properties of the Er3+/Sm3+ co-doped BiOCl phosphors as single-phase phosphors were reported. Upon near ultraviolet excitation(NUV, 380 nm corresponding the 4 I15/2→ 4 G11/2 transition of Er3+ ions), the phosphors exhibit the efficient characteristic emissions of Er3+ and Sm3+ ions simultaneously. The energy transfer（ET） from Er3+ to Sm3+ ions in the layered crystals has been validated by the variation of emission intensities and decay lifetimes respectively, which is ascribed to be a dipoledipole interaction. By virtue of the ET behavior and increasing Sm3+ ion concentration, the enhancing emission intensity of Sm3+ and the tunability of emission color from yellowish-green（0.318, 0.420） to white（0.343, 0.347） are realized. The results of our work indicate that the Er3+/Sm3+ co-doped BiOCI phosphor has a promising application serving as single component white emitting phosphors for NUV excited WLEDs.
关键词：
