作　　者： ; ; ;

机构地区： 华南理工大学材料科学与工程学院高分子光电材料与元器件研究所

出　　处： 《光学学报》 2011年第2期286-292,共7页

摘　　要： 针对聚合物电致发光二极管(PLED)面光源的结构特点,建立了PLED面光源正负极双通道的散热模型。采用有限元分析软件对PLED面光源在光强为1000 cd/m2时的热特性进行模拟,获得其在自然对流和强制对流下的温度场分布图,从仿真结果知PLED器件的最高温度TH均处于PFO-BT发光层,分别为43.934℃和26.234℃。模拟PLED面光源由开始加载电压至光强为5000 cd/m2的全过程,获得PLED面光源最高温度TH与输入功率P之间线性关系。通过改变PLED面光源电极形状及开口率大小,分别模拟得出其对PLED面光源热特性的影响。仿真结果表明电极形状是PLED面光源最高温度TH重要影响因素之一,采用圆形电极更有利于PLED面光源散热,PLED面光源最高温度TH随着开口率增大而增大,但并非呈现简单线性关系。PLED面光源的热学研究结果为其优化设计提供了理论依据。 Abstract For structural characteristics of polymer light-emitting diode （PLED） surface light source, thermal model of dual-channel is built. By using finite element analysis software, the thermal properties of PLED surface light source is simulated in the light intensity of 1000 cd/m^2, and temperature distribution is obtained under natural convection and forced convection. The simulation results show that the highest temperature is in PFO-BT emitting layer of the PLED surface light source with temperature of 43. 934 ℃ and 26. 234 ℃ respectively. By simulating the whole process from the beginning to the light intensity of 5000 cd/mz, the linear relation between the highest temperature TH and input power P is gained. By changing the electrode shape and size of aperture opening ratio of PLED surface light source respectively, the influence of these factors on thermal characteristics of PLED surface light source is obtained. The simulation results reveal that the electrode shape is one of the most important factors to the highest temperature T. of PLED surface light source, and using circular electrode can promote the dissipation of heat of PLED surface light source effectively. As the aperture opening ratio increases, the highest temperature TH of PLED surface light source increases steadily, but they do not present a simple linear relationship. These results provide a basis for the optimization of PLED surface light source.

关 键 词： 薄膜 热分析 热特性 有限元分析 聚合物电致发光二极管 面光源

领　　域： [理学] [理学]