无机电致发光的新进展及机理分析  

New Developments and Analysis on Mechanism of Inorganic Electroluminescence

作　　者：张福俊[1] 徐征[1] 王丽伟[1] 姜薇薇[1] 刘玲[1] 

机构地区：[1]北京交通大学光电子技术研究所

出　　处：《光电子技术与信息》2006年第3期1-4,共4页Optoelectronic Technology & Information

基　　金：国家重点基础研究发展计划(2003CB314707)国家自然科学基金(10374001)北京市自然基金(2032015)北京交通大学优秀博士生科技创新基金(48011)

摘　　要：主要介绍了分层优化结构、蓝源成彩技术(color-by-blue)及无机薄膜电致发光中的一些物理问题。在分层优化结构中采用了极性材料SiO2作为电子加速层,可以将过热电子的最大能量提到10 eV左右,增加了可以激发发光中心的过热电子数目,是提高无机薄膜电致发光效率的唯一的方法。蓝源成彩技术(color-by-blue) 是两种激发方式的混合——电致发光和光致发光,利用BaAl2S4:Eu材料中获得的高亮度(900 cd／m2)的蓝色电致发光激发绿色及红色光致发光材料,获得了色纯度非常高的三基色发光,实现了无机彩色电致发光。目前以蓝源成彩技术为基础的17英寸彩色电视机样机已经问世,这种电视机的最大亮度可以到600 cd／cm2,对比度达到 1000:1。The layered optimization scheme and color-by-blue technology are introduced, some physical problems about inorganic electroluminescence are discussed. In the ＂LOS, the polar＂ material SiO2 is used as electron-accelerated layer; the maximal energy of hot electrons may achieve 10 eV. But the energy of hot electron has a great distribution due to the influence of crystal lattice. The color-by-blue technology developed by Ifire Company is the blend of two kinds of luminescence, electroluminescence and photoluminescence. The high brightness full-color EL didn＇t appear until recently because the blue phosphor for EL has not heen developed. Defect free 17 in. VGA CBB show better characteristics, a high peak luminance of 600 cd/cm^2 and a high contrast ratio of 1000：1.

关 键 词：分层优化结构 蓝源成彩 过热电子 

分 类 号：TN383.1[电子电信—物理电子学]