利用色彩转换法制备高色稳定性的柔性白色有机电致发光器件  

Highly color-stability flexible white organic light-emitting devices fabricated by color conversion method

作　　者：吴晓明[1] 申利莹[1] 华玉林[1] 董木森[1] 穆雪[1] 白娟娟[1] 毕文涛[1] 杨小艳[1] 印寿根[1] 

机构地区：[1]天津理工大学材料科学与工程学院,显示材料与光电器件教育部重点实验室,天津市光电显示材料与器件重点实验室,天津300384

出　　处：《物理学报》2012年第17期553-558,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60906022;60876046);天津市自然科学基金(批准号:10JCYBJC01100);天津市高等学校科技发展基金计划重点项目(批准号:2011ZD02)资助的课题~~

摘　　要：本文利用色转换方法,将高效的蓝色柔性有机电致发光器件(flexible organic light emitting devices,FOLEDs)与色转换材料(color conversion material,CCM)相结合,制备了柔性白色有机电致发光器件(white organic light emittingdevices,WOLEDs).首先利用2,3,5,6-Tetrafluoro-7,7,8,8-tetracyano-quinodimethane(F4-TCNQ)和4,4′,4″-tris-(N-3-methylphenyl-N-phenylamino)tripheny-lamine(m-MTDATA)组成的多量子阱(multiple quantum well,MQW)结构作为空穴注入层(hole injection layer,HIL)结合新型蓝光材料N^6,N^6,N^(12),N^(12)-tetrap-tolylchrysene-6,12-diamine(NCA)制备出高效的蓝光FOLEDs,然后将其与色转换材料4-(dicyanomethylene)-2-tert-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran(DCJTB)结合,通过沉积不同厚度的CCM来优化白光器件的发光光谱,获得了色稳定性较高的白光.实验结果表明:在驱动电压为7 V,DCJTB的厚度为120 nm时得到较接近白光等能点的色坐标(0.33,0.27),且当驱动电压由6 V升至11 V时,器件的色坐标变化仅为(30.02,±0.02),表现出高色稳定性.We demonstrate flexible white organic light-emitting diode （WOLED） with high color stability, which combines vacuum deposited blue flexible organic light-emitting diode （FOLED） with red surface color conversion material （CCM）. Firstly, we utilize the novel multiple quantum well （MQW）, which consists of the alternate layers of 2, 3, 5, 6-Tetrafluoro-7, 7, 8, 8-tetracyano-quinodimethane （F4-TCNQ） and 4, 4′, 4″-tris-（N-3-methylphenyl-N-phenylamino） tripheny-lamine （m-MTDATA） as hole injection layer （HIL）, through combining a new blue emitting material of N^6, N^6, N^12, N^12-tetrap-tolylchrysene-6, 12-diamine （NCA）, to fabricate highly efficient blue FOLED. Then, the CCM of 4-（dicyanomethylene）-2-tert-butyl-6-（1, 1, 7, 7-tetramethyljul-oli-dyl-9-en-yl）-4H-pyran （DCJTB） is deposited on the outside of the ITO flexible substrate. Finally, the thickness of the color conversion film （CCF） is optimized to improve the color purity of flexible WOLED. The results demonstrate that at a driving voltage of 7 V, the CIE coordinates of （0.33, 0.27） which are very close to the white equal-energy area are obtained with the thickness of DCJTB of 120 nm. Moreover, the CIE coordinate migrations of the flexible WOLED are less than （±0.02, ±0.02） in a wide range of driving voltages （from 6 V to 11 V） for the device, indicating the flexible WOLED has excellent color stability.

关 键 词：柔性白色有机电致发光器件 色彩转换材料 色稳定性 

分 类 号：TN383.1[电子电信—物理电子学]