Emission Characteristics of PVK Doped TbY(o-MBA)_6(phen)_2 Systems  

作　　者：张元元 邓振波 梁春军 陈宝妹 肖静 徐登辉 王瑞芬 

机构地区：[1]Institute of Optoelectronic Technology, Key Laboratory of Information Storage and Display, Beijing Jiaotong University, Beijing 100044, China [2]Department

出　　处：《Journal of Rare Earths》2006年第2期150-154,共5页稀土学报（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina(90201004);BeijingScience&TechnologyFoundation(H030430020410);andtheNaturalScienceFoundationofHebei(203148)

摘　　要：A rare earth complex TbY （o-MBA）6（phen）2 was synthesized, which was first used as an emitting material in electroluminescence. By doping it into the conjugated polymer PVK, single-layer and double-layer devices were fabricated with structures： device A ： ITO/PVK ： rpDY （o-MBA）6（phen）2/LiF/Al; B ： ITO/PVK ： rpDY （o-MBA）6（phen）2/AIQ/LiF/Al; C： ITO/PVK： TbY（o-MBA）6（phen）2/BCP/AlQ/LiF/Al. The characteristics of these devices were investigated. For single-layer and double-layer devices, the emission of PVK was completely restrained, and only the green emission from rpD^3＋ was observed in electroluminescence. The above mentioned observation is attributed to the different mechanism of electroluminescence and photoluminescence. In photoluminescence process, the energy of Tb complex may come from PVK through Forster energy transfer process, while in electroluminescence process direct sequential charge trapping appeares to be the main operating mechanism. From the optimized device B, brightly green emission can be obtained, and the highest EL brightness of the device reaches 213 cd·m^-2 at 14 V.A rare earth complex TbY （o-MBA）6（phen）2 was synthesized, which was first used as an emitting material in electroluminescence. By doping it into the conjugated polymer PVK, single-layer and double-layer devices were fabricated with structures： device A ： ITO/PVK ： rpDY （o-MBA）6（phen）2/LiF/Al; B ： ITO/PVK ： rpDY （o-MBA）6（phen）2/AIQ/LiF/Al; C： ITO/PVK： TbY（o-MBA）6（phen）2/BCP/AlQ/LiF/Al. The characteristics of these devices were investigated. For single-layer and double-layer devices, the emission of PVK was completely restrained, and only the green emission from rpD^3＋ was observed in electroluminescence. The above mentioned observation is attributed to the different mechanism of electroluminescence and photoluminescence. In photoluminescence process, the energy of Tb complex may come from PVK through Forster energy transfer process, while in electroluminescence process direct sequential charge trapping appeares to be the main operating mechanism. From the optimized device B, brightly green emission can be obtained, and the highest EL brightness of the device reaches 213 cd·m^-2 at 14 V.

关 键 词：terbium complex electroluminescence （EL） EXCITON rare earths 

分 类 号：O621.25[理学—有机化学]