研究了几种具有不同周期数的量子阱结构和不同势垒层厚度的有机电致发光器件的特性.器件中的量子阱结构是由tris-(8-hydroxyquinoline) aluminum (Alq3)和2,9-dimethyl-4,7-diphenyl-1,10-phenanth-roline(BCP)两种材料制备的.其中Alq3层作为电子的势阱层,BCP层作为电子的势垒层.实验结果表明,两个周期的阱结构器件的电流效率最高,为3.46 cd/A,大约是传统三层结构器件的1.6倍.器件电流效率的提高是由于当阱结构周期数增加时,阱结构对载流子的限制作用会增强,这使得势阱层(发光层)中激子的形成几率增大,因此器件效率提高.但是当量子阱周期数太大时,电流效率反而会降低.在实验过程中,还研究了不同势垒层厚度对器件特性的影响.实验结果表明,选用适当的阱结构周期数和适当的势垒层厚度,可以提高有机电致发光器件的性能.
参考文献
| [1] | Tang C W,Vanslyke S A.Organic electroluminescent diodes[J].Appl.Phys.Lett.,1987,51(12):913-915. |
| [2] | 史高飞,牛红林,鲁文武,等.MoO3作空穴注入层的绿光有机电致发光器件制备及其性能研究[J].液晶与显示,2012,27(2):177-181. |
| [3] | 王振,陈双文,周翔.高效率有机蓝光和白光电致发光器件[J].发光学报,2011,32(7):715-719. |
| [4] | 高永慧,姜文龙,丁桂英,等.基于NPBX掺杂CzHQZn的黄色有机电致发光器件[J].液晶与显示,2011,26(1):44-48. |
| [5] | 王俊西,李宏建,熊志勇,等.LiF修饰阴极的双层有机电致发光器件的延时效应[J].发光学报,2010,31(1):17-24. |
| [6] | Imanishi Y,Hattori S,Kakuta A,et al.Direct observation of an organic superlattice structure[J].Phys.Rev.Lett.,1993,71(13):2098 2101. |
| [7] | So F F,Forrest S R.Evidence for exciton confinement in crystalline organic multiple quantum wells[J].Phys.Rev.Lett.,1991,66(20):2649-2652. |
| [8] | Huang J S,Yang K X,Liu SY,et al.High-brightness organic double-quantum-well electroluminescent devices[J].Appl.Phys.Lett.,2000,77(12):1750-1752. |
| [9] | Ohmori Y,Fujii A,Yoshida M,et al.Novel characteristics of electroluminescent diode with organic multiple-quantum-well structure[J].J pn.J.Appl.Phys.Part 1,1995,34:3790-3793. |
| [10] | Qian L,Teng F,Yang S Y.Luminescent properties and excitation mechanism of organic-inorganic single quantum well containing organic heterojunction[J].Chem.Phys.Lett.,2006,417(4-6):441-444. |
| [11] | So F F,Forrest S R,Shi Y Q,et al.Quasi epitaxial growth of organic multiple quantum well structures by organic molecular beam deposition[J].Appl.Phys.Lett.,1990,56(7):674-676. |
| [12] | So F F,Forrest S R.Evidence for exciton confinement in crystalline organic multiple quantum wells[J].Phys.Rev.Lett.,1991,66(20):2649-2652. |
| [13] | Fujita S,Nakazawa T,Asano M.Comparative study of photoluminescence dynamics of Tris(8-hydroxyquinoline)aluminum-based organic multilayer structures with different types of energy lineups[J].J pn.J.Appl.Phys.,2000,39(9A):5301-5309. |
| [14] | Ohmori Y,Fujii A,Uchida M,et al.Observation of spectral narrowing and emission energy shift in organic electroluminescent diode utilizing 8-hydroxyquinoline aluminum/aromatic diamine multilayer structure[J].Appl.Phys.Lett.,1993,63 (14):1871-1873. |
| [15] | Ohmori Y,Fujii A,Uchida M,et al.Fabrication and characteristics of 8-hydroxyquinoline aluminum/aromatic diamine organic multiple quantum well and its use for electroluminescent diode[J].Appl.Phys.Lett.,1993,62(25):3250-3252. |
| [16] | An H Y,Chen B J,Hou J Y,et al.Exciton confinement in organic multiple quantum well structures[J].J.Phys.D:Appl.Phys.,1998,31(10):1144-1148. |
| [17] | An H Y,Hou J Y,Chen B J,et al.Fabrication and characterization of high quality organic multiple quantum well structures[J].Thin Solid Films,1998,326(1-2):201-204. |
| [18] | Xie Z Y,Huang J S,Li C N,et al.White light emission induced by confinement in organic multiheterostructures[J].Appl.Phys.Lett.,1999,74(5):641-643. |
| [19] | Huang J S,Yang K X,Liu S Y,et al.High-brightness organic double-quantum-well electroluminescent devices[J].Appl.Phys.Lett.,2000,77(12):1750-1752. |
| [20] | Zhao D W,Song S F,Zhang F J,et al.The effect of multilayer quantum well structure on the characteristics of OLEDs[J].Displays,2007,28(2):81-84. |
| [21] | Zhao D W,Song S F,Zhao S L,etal.Use of multiple layers to adjust energy transfer for raising intensity of photoluminescence[J].J.Phys.D:Appl.Phys.,2007,40(7):1915-1918. |
| [22] | Yang Y K,Gao W B,Liu H Y,et al.An organic quantum-well electroluminescent device with enhanced performance[J].Chin.Phys.Lett.,2001,18(12):1658-1659. |
| [23] | Qiu Y,Gao Y D,Wei P,et al.Organic light-emitting diodes with improved hole-electron balance by using copper phthalocyanine/aromatic diamine multiple quantum wells[J].Appl.Phys.Lett.,2002,80(15):2628-2630. |
| [24] | Qiu Y,Gao Y D,Wang L D,et al.High efficiency organic light-emitting diodes with tunable light emission by using aromatic diamine/5,6,11,12-tetraphenylnaphthacene multiple quantum wells[J].Appl.Phys.Lett.,2002,81(19):3540-3542. |
| [25] | Yang S H,Hong B C,Huang S F.Luminescence enhancement and emission color adjustment of white organic lightemitting diodes with quantum-well-like structures[J].J.Appl.Phys.,2009,105(11):113105(1-3). |
| [26] | Chellappan V,Bavani B,Chun H,et al.A study of charge mobility characteristics in a series of biphenylyl substituted PPV derivatives[J].Chem.Phys.Lett.,2005,414(4-6):393-397. |
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