制备了结构为ITO/MoO3(40 nm)/NPB(40 nm)/TCTA(10 nm)/CBP∶GIR1 (14％)(x)/CBP∶R-4B(6％) (30-x)/BCP(10 nm)/A1Q(40 nm)/LiF(1 nm)/AL(100 nm)的绿红磷光器件.通过调节红绿发光层的相对厚度,对器件的发光性能进行了研究.结果表明:x为15 nm,电压为6V,电流密度为255.6 mA/cm2,得到最高电流效率为15.4 cd/A,红色发光峰值强度相对较大,绿色峰值稍弱的电致发光光谱.分析原因可能是掺杂染料与临近层的能级匹配和浓度等会影响发光层载流子注入与传输;空穴及电子阻挡层对发光层内载流子和激子的有效限制作用会提高掺杂染料在发光层的复合几率;另外,CBP的空穴迁移率大于电子迁移率,发光的主要区域位于发光层与BCP界面,掺杂于该区域的R-4B具有较高的发光强度.
参考文献
| [1] | 吴空物,华玉林,牛飞剑,等.以Zn(BTZ)2:rubrene为发光层的一种新型白色有机电致发光液晶显示背光源[J].液晶与显示,2005,20(5):419-421.Wu K W,Hua Y L,Niu F J.A kind of novel white organic electroluminescence device based on Zn(BTZ)2:rubrene emitting layer for LCD backlighting[J].Chinese Journal of Liquid Crystals and Displays,2005,20(5):419-421.(in Chinese) |
| [2] | Najafabadi E,Knauer K A,Haske W,et al.Hightly efficient inverted top-emitting green phosphorescent organic light emitting diodes on glass and flexible substrates[J].Appl.Phys.Lett.,2012,023304:101-104. |
| [3] | 赵娟,于君生,李璐,等.铱配合物磷光材料(t-bt)2 Ir(acac)的厚度对有机电致发光器件的影响[J].光电子·激光,2011,22(2):170-174.Zhao J,Yu J S,Li L,et.al.Effects of ultrathin layer thickness of iridium complex phosphor(t-bt) 2 Ir(acac) on the performance of organic light emitting devices[J].Journal of Optoelectronics Laser,2011,22(2):170 174.(in chinese) |
| [4] | Tae J P,Woo S J,Park J J,et al.Efficient simple structure red phosphorescent organic light emitting devices with narrow band gap fluorescent host[J].Appl.Phys.Lett.,2008,92(11):178-183. |
| [5] | 陈金鑫,陈锦地,吴忠帜.白光OLED照明[M].上海:上海交通大学出版社,2011.Chen J X,Chen J D,Wu Z Z.White OLED for Lighting[M].ShangHai.:Shanghai Jiaotong University Press,2011.(in Chinese) |
| [6] | Liu Z W,Helander M G,Wang Z B,et al.Effcient bilayer phosphorescent organic light-emitting diodes:Direct hole injection into triplet dopants[J].Appl.Phys.Lett.,2009,94:123-127. |
| [7] | Adachi C,Baldo M A,Forrest S R,et al.High-efficiency organic electrophosphorescent devices with tris(2 phenylpyridine)iridium doped into electron-transporting materialls[J].Appl.Phys.Lett.,2000,77 (6):904-906. |
| [8] | O'Brien D F,Baldo M A,Thompson M E,et al.Improved energy transfer in electrophos-phorescent devices[J].Appl.Phys.Lett.,1999,74(3):442-446. |
| [9] | 杨少鹏,居秀琴,赵方超,等.掺杂与空穴阻挡对蓝光有机电致发光性能的影响[J].功能材料,2009,40(9):1422-1424.Yang S P,Ju X Q,Zhao F C,et al.Influence of doping and hole-blocking on the luminesent performance of blue OLED[J].Journal of Function Materials,2009,40(9):1422-1424.(in Chinese) |
| [10] | Han L L,Yang D F,Li W L,et al.Intramolecular energy transfer between the triplet of ancillary ligandand the metal to ligand charge transfer state existed in heterocyclometalated iridium (Ⅲ) complexes[J].Appl.Phys.Lett.,2008,93:698-701. |
| [11] | 李红艳,张玉祥,张宏科.不同主体材料对红光OLED磷光器件性能的影响[J].发光学报,2009,30(5):585-589.Li H Y,Zhang Y X,Zhang H K,et al.Effect of a series of host material on optoelectronic performance of red phos phorescent OLED[J].Chinese Journal of Luminescence,2009,30 (5):585 589.(in Chinese) |
| [12] | 张雷,吴华夏,胡俊涛,等.一种基于FPGA的OLED显示系统[J].液晶与显示,2011,26(4):538-543.Zhang L,WU H X,HU J T,et al.Display system of OLED based on FPGA[J].Chinese Journal of Liquid Crystals and Displays,2011,26(4):538-543.(in Chinese) |
| [13] | 范昭奇,程传辉,申人升,等.基于四取代铜酞菁的有机近红外电致磷光器件[J].光电子·激光,2010,21(4):524-528.Fan ZH Q,Cheng CH H,Shen R SH,et al.Near-infrared organic electrophosphorescen ct diodes based on Tet-rasubstituted copper phthalocyanine[J].Journal of Optoelectronics Laser,2010,21(4):524-528.(in Chinese) |
| [14] | 王红,于君生,李璐,等.BCP对有机发光器件性能的影响[J].光电子·激光,2008,19(11):1429-1431.Wang H,Yu J S,LI L,et al.Effect of BCP layer on organic light emitting devices performance[J].Journal of Optoelectronics Laser,2008,19 (11):1429-1431.(in Chinese) |
| [15] | Han L L,Yang D F,Li W L,et al.The reduced triplet-triplet annihilation of electrophosphorescent device doped by an iridium complex with active hydrogen[J].Appl.Phys.Lett.,2008,93:568-671. |
| [16] | Zhao Y B,Chen J SH,Ma D.Realization of high efficiency orange and white oranic light emitting diodes by introducting an ultra-thin undoped orange emitting layer[J].Appl.Phys.Lett,2011,99:871-874. |
| [17] | Zhao Y,Duan L,Zhang D Q,et al.Small molecular phosphorescent organic light-emitting diodes using a spincoated hole blocking layer[J].Appl.Phys.Lett.,2012,100:942-946. |
| [18] | Teng M Y,Zhang S,Sheng W,et al.Elector mobility determination of efficient phosphorescent iridium complexes with tetraphenylimidodiphosphinate ligand via trassient electroluminescence method[J].Appl.Phys.Lett.,2011,100:320-324. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%