摘要
设计了一种有机电致发光器件(OLED)结构:ITO/NPB(50 nm)/BCP(x)/Alq3(50 mm)/LiF(0.5mm)/Al(120 nm)。在实验中改变BCP的厚度,调整电子和空穴的注入平衡,控制发光层(EML)。研究发现:当BCP的厚度为0 nm时,器件为典型的双层OLED结构,光谱为绿色的Alq3特征光谱;当厚度为8 nm或8 nm以上时,发光区完全基于NPB层,器件为蓝色发光;当厚度在1 nm到8 nm时,NPB层和Alq3层对发光都有贡献,EL谱线包括蓝光发射和绿光发射。BCP层起到了调节载流子复合区域和改变器件发光颜色的作用,因此控制BCP的厚度可以改善器件的性能。
We have designed and fabricated a traditional organic light-emitting diodes （OLED）. We appended a kind of hole blocking material（BOP） in the device and altered the thickness of BOP and adjusted the balance of the electron and hole to control the light-emitting zone. It is shown in the experiments that when the BOP thickness is 0 nm,the device structure is typical double layer organic electroluminescent structure and the character spectrum is green emitting of Alq3 ;when the thickness is 8 nm or over 8 nm,the device is blue emitting of NPB;when it is between 1 nm and 8 nm,NPB and Alq3 both contribute to emitting,and EL spectrum includes the blue and green emission. BOP layer plas the role to regulate carrier compound area and change color. So the device performance will be improved by controlling the BOP thickness.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2005年第9期1036-1039,共4页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(60207003
60376028)
国家重点基础研究资助项目(2003CB314703)
吉林省教育厅资助项目(吉教科合字[2003]第25号)
