新型有机光伏及电致发光器件研究

New Organic Electroluminescence and Photovoltaic Devices

用物理气相沉积(PVD)的方法制备了结构为ITO/m MTDATA/Bphen/LiF/Al有机异质结光估器件。在能量为4mW/cm2的365nm波长的紫外光从ITO电极方向照射下,器件的开路电压、短路电流和填充因子分别为1.3V、0.089mA/cm2和0.22,对应的能量转换效率为0.64%;在直流电压驱动下,器件表现电致发光(EL)特性,发黄色光,其阈值电压为4V,14V时达到最大亮度为1350cd/m2,研究证明它来自于有机界面的激基复合物发射。

Organic heterostructure photovoltaic(PV) devices,in which 1,3,5-tris-(3-methylphenylphenylamino) triphenylamine (m-MTDATA) and bathophenanthroline (Bphen) were used as electron-acceptor and electron-donor,respectively,were fabricated by the method of physics vapor deposition(PVD).PV parameters (open-circuit voltage V_(oc),short-circuit I_(sc) and fill factor FF)of the devices were described when irradiated by a 365 nm UV-light (4 mW/cm^2).i.e., the device exhibited V_(oc)=1.3 V,I_(sc)=0.089 mA/cm^2 and FF=0.22.The power conversion efficiency of the m-MTDATA/Bphen device is 0.64 % under irradiation of UV light (4 mW/cm^2),The m-MTDATA/Bphen device also showed relative bright yellow electroluminescence(EL) emission generated from the exciplex between the two organic layer.The threshold voltager is about 4 V and the maximum brightness is 1 350 cd/m^2 at 14 V.The properties of the devices were also attributed to the strong exciplex formation in the interface between m-MTDATA and Bphen.