采用溶胶凝胶法制备Li^+掺杂Ba(Mg 1/3 Nb 2/3)O 3∶Er^3+荧光粉,研究了碱金属离子掺杂对Ba(Mg 1/3 Nb 2/3)O 3∶Er^3+荧光粉物相结构及发光特性的影响。结果表明:Li^+的引入弥补了空位缺陷,提高了稀土离子之间的能量传递效率;同时降低...采用溶胶凝胶法制备Li^+掺杂Ba(Mg 1/3 Nb 2/3)O 3∶Er^3+荧光粉,研究了碱金属离子掺杂对Ba(Mg 1/3 Nb 2/3)O 3∶Er^3+荧光粉物相结构及发光特性的影响。结果表明:Li^+的引入弥补了空位缺陷,提高了稀土离子之间的能量传递效率;同时降低结构对称性,提高Er^3+的4 f能级跃迁概率;并且提高了荧光粉的结晶度。Li^+掺杂提高了Ba(Mg 1/3 Nb 2/3)O 3∶Er^3+荧光粉的上转换发光强度,当Li^+掺杂浓度为3%(摩尔分数)时,上转换发光强度最高增强了4倍。展开更多
BaZnP2O7∶Eu3+ phosphor was synthesized by a high temperature solid state reaction.The compound shows four major emission peaks locating at 588,613,622 and 654 nm that correspond to the 5D0-7F1,5D0-7F2 and 5D0-7F3 typ...BaZnP2O7∶Eu3+ phosphor was synthesized by a high temperature solid state reaction.The compound shows four major emission peaks locating at 588,613,622 and 654 nm that correspond to the 5D0-7F1,5D0-7F2 and 5D0-7F3 typical transition of Eu3+,respectively.The influence of the concentration of Eu3+ ions on the emission intensity was investigated and the concentration quench did not occured.The role of charge compensation of Li+,Na+ and Cl-ions to the emission intensity was also studied.It was found that Li+ ions gave the best improvement to enhance the intensity of the emissions.The results show that BaZnP2O7∶Eu3+red-emitting phosphor is very suitable for white light emitting diode(w-LED)based on UV InGaN chip.展开更多
基金Supported by the National Natural Science Foundation of China(No.51572232,No.51561135015)Key Technology Research and Development Program of Ningbo(No.2011B1001)
文摘采用溶胶凝胶法制备Li^+掺杂Ba(Mg 1/3 Nb 2/3)O 3∶Er^3+荧光粉,研究了碱金属离子掺杂对Ba(Mg 1/3 Nb 2/3)O 3∶Er^3+荧光粉物相结构及发光特性的影响。结果表明:Li^+的引入弥补了空位缺陷,提高了稀土离子之间的能量传递效率;同时降低结构对称性,提高Er^3+的4 f能级跃迁概率;并且提高了荧光粉的结晶度。Li^+掺杂提高了Ba(Mg 1/3 Nb 2/3)O 3∶Er^3+荧光粉的上转换发光强度,当Li^+掺杂浓度为3%(摩尔分数)时,上转换发光强度最高增强了4倍。
文摘BaZnP2O7∶Eu3+ phosphor was synthesized by a high temperature solid state reaction.The compound shows four major emission peaks locating at 588,613,622 and 654 nm that correspond to the 5D0-7F1,5D0-7F2 and 5D0-7F3 typical transition of Eu3+,respectively.The influence of the concentration of Eu3+ ions on the emission intensity was investigated and the concentration quench did not occured.The role of charge compensation of Li+,Na+ and Cl-ions to the emission intensity was also studied.It was found that Li+ ions gave the best improvement to enhance the intensity of the emissions.The results show that BaZnP2O7∶Eu3+red-emitting phosphor is very suitable for white light emitting diode(w-LED)based on UV InGaN chip.
