CAJ | 학술논문

顶发射白光有机发光二极管（white organic light-emitting diodes ，WOLEDs）因可与有源驱动电路结合实现大开口率和高分辨率，因而在白光照明和全彩显示中有着良好的应用前景．本文制备了红/蓝双磷光发光层的顶发射 WOLEDs ，通过在红光层与蓝光层间插入电子阻挡层 tris （phenypyrazole）iridium （Ir （ppz ）3），降低了对红光掺杂浓度的要求，红光掺杂浓度的提高不仅降低了对制备工艺的要求，提高了工艺可重复性，而且改善了WOLEDs的效率与色度稳定性。分析了色度稳定的原因，优化了红光和蓝光磷光客体的掺杂浓度，制备出发光效率达到7.9 cd · A -1的顶发射WOLED ，其色坐标位于暖白光区，在87～2402 cd · m-2亮度范围内色度很稳定，仅变化（0.006，0.01）。
정발사백광유궤발광이겁관（white organic light-emitting diodes ，WOLEDs）인가여유원구동전로결합실현대개구솔화고분변솔，인이재백광조명화전채현시중유착량호적응용전경．본문제비료홍/람쌍린광발광층적정발사 WOLEDs ，통과재홍광층여람광층간삽입전자조당층 tris （phenypyrazole）iridium （Ir （ppz ）3），강저료대홍광참잡농도적요구，홍광참잡농도적제고불부강저료대제비공예적요구，제고료공예가중복성，이차개선료WOLEDs적효솔여색도은정성。분석료색도은정적원인，우화료홍광화람광린광객체적참잡농도，제비출발광효솔체도7.9 cd · A -1적정발사WOLED ，기색좌표위우난백광구，재87～2402 cd · m-2량도범위내색도흔은정，부변화（0.006，0.01）。
Top-emitting white organic light-emitting diodes (WOLEDs) have potential applications in lighting and full color dis-plays due to the potential realization of a large aperture ratio and a high resolution when recombining top-emitting WOLEDs with active-matrix driving circuits .In the present paper ,the authors fabricated top-emitting WOLEDs based on the red/blue dual-phosphorescent emitting layers and improved luminous efficiency and color stability in WOLEDs through inserting an tris (pheny-pyrazole)iridium (Ir(ppz)3 ) thin film as an electron-blocking layer between the red layer and the blue one .The insertion of an Ir(ppz)3 thin film can easily generate white emission through the enhancement of doping concentration of the red dopant ,thus reducing the serious requirements of manufacture technology and improving the reproducibility of process technology .In addi-tion ,the authors analyzed the mechanism of color stability ,optimized the concentrations of the red and blue phosphorescent dop-ants ,and realized a luminous efficiency of as high as 7.9 cd · A -1 in the authors’ top-emitting WOLED .The white emission lies in the warm-white region with a very small chromaticity change of (0.006 ,0.01) under a wide brightness range of 87~2 403 cd · m -2 .