CaS·Cu⁺,Eu²⁺的光致发光及其在农业生产中的应用

CaS·Cu + ,Eu 2+ 的光致发光及其在农业生产中的应用 PHOTOLUMINESCENCE AND APPLICATION OF CaS·Cu + ,Eu 2+ 廉世勋 Lian Shixun first-author 毛向辉 Mao Xianghui 吴振国 Wu Zhenguo 李承志 Li Chenzhi 曾跃 Zhen Yao 湖南师范大学化学系 长沙,410006 湖南师范大学化学系 长沙,410006 Department of Chemistry, Hunan Normal University, Changsha 410006 Department of Chemistry, Hunan Normal University, Changsha 410006 研究了Cu + ,Eu 2+ 共激活的CaS的发光性质及激活剂浓度与荧光性质的关系.Cu + 和Eu 2+ 的发射光谱分别在430 nm附近及630 nm附近,它们是由Cu' Ca -V s 2+ 中心的离子发射和Eu 2+ 的5d-4f跃迁发射产生的.实验结果表明,Cu + 对Eu 2+ 荧光发射有较强的敏化作用,Eu 2+ 对Cu + 发射峰值波长和强度也有显著影响;单掺Eu 2+ 或Cu + 的荧光粉是良好的农用薄膜红,蓝光转换剂,共掺Eu 2+ 和Cu + 的CaS荧光粉作光转换农膜添加剂可望人工模拟叶绿素的吸收光谱,使作物在植物最佳生长作用光谱环境中生长,促使作物早熟或提高作物产量. The fluorescence-of Cu + and Eu 2+ coactivated CaS is reported. The emission bands of Cu + and Eu 2+ peaking at 430 nm and 630 nm were originated from Cu + transition of Cu' Ca -V s 2+ centers and 5d-4f transition of Eu 2+ ,respectively. The dependence of luminescence properties of Cu + nd Eu 2+ on their concentration was investigatad. The emission of Eu 2+ is sensitized by Cu + and the peak wavelength and intensity of Cu + -emission band are affected by Eu 2+ . The experimental results indicate that there exists effective energy transfer from Cu + to Eu 2+ in CaS host. CaS·Cu + and CaS·Eu 2+ are good red-light transition agent and blue-light trasition agent for farm film,respectively. The absorption spectrum of chlorophyll photosynthesis can be imitated-by light transition film for farm using CaS·Cu + ,Eu 2+ phosphor as additive,Which can make the crops growth in the environment of function spectrum of the best growth of plants,and promote its growth or increase yield. CaS· Cu + +Eu 2+ 光致发光 模拟 叶绿素 光合作用 CaS· Cu + +Eu 2+ photoluminescence lmitation chlorophyll photosynthesis 湖南省计委资助 1996-06-17 1997-05-30 2020-08-11 2 18