【摘要】 将薄层金属Al和含磷氧基团的有机材料DPSF依次蒸镀在ITO阴极上作为电子注入层,成功制备了具有反转结构的底发光有机发光二极管(IBOLED)。结果表明,Al/DPSF作为电子注入层可以有效降低ITO与发光层Alq3之间的注入势垒,大大降低了器件的工作电压,显著提高了器件的发光效率。反转器件的最大电流效率达到了4.9 cd A-1,最大亮度为17000 cd m-2,与正置器件的发光性能相当。更多还原

【Abstract】 Efficiently inverted bottom-emission organic light-emitting diodes(IBOLED) based on Indium Tin Oxide(ITO) cathode have been successfully fabricated using Al/DPSF(2,7-bis(diphenylphosphoryl)-9,9’-spirobi[fluorene]) as the electron-injection layer.It was found that the electron injection barrier between ITO and the light-emitting layer of Tris(8-hydroxyquinolinato)aluminium(Alq3) can be significantly reduced at presence of Al/DPSF,leading to the reduce of operating voltage and the improvement of efficiency in the IBOLED.The inverted device exhibits a maximum current efficiency of 4.9 cd A-1 and a maximum luminance of 17000 cd m-2,which can be comparable with the conventional OLED.更多还原