在氧化铟锡(ITO)阴极上依次蒸镀2 nm铝和2 nm碳酸锂(Li2 CO3)薄膜作为电子注入层,成功制备出器件结构为ITO/Al/Li2 CO3/SPPO13/SPPO13:FIrpic/TCTA/MoO3/Al(SPPO13:2,7-双(二苯基磷)-9,9'-螺二[芴]；FIrpic:双(4,6-二氟苯基吡啶-N,C2)吡啶甲酰合铱；TCTA:4,4',4"-三(咔唑-9-基)三苯胺)的蓝色磷光反转底发光有机发光二极管(IBOLED).结果表明,Al/Li2CO3作为电子注入层可以有效降低ITO与有机材料之间的电子注入势垒,蓝色磷光IBOLED的起亮电压由11 V降至4.2V,器件的发光效率也得到有效提高.蓝光磷光IBOLED的最大电流效率与功率效率分别达到了28.2 cd/A和19.6 lm/W,制备出的反转结构器件性能可与传统正置结构比美,说明Al/Li2 CO3可以作为反转有机发光二极管优良的电子注入层.
参考文献
| [1] | Tang C W,Vanslyke A.Organic Electroluminescent Diodes[J].Appl Phys Lett,1987,51 (12):913-915. |
| [2] | Baldo M A,O'Brien D F,You Y.Highly Efficient Phosphorescent Emission from Organic Electroluminescent Devices[J].Nature,1998,395(6698):151-154. |
| [3] | Gustufsson G,Cao Y,Treacy G M.Flexible Light-emitting Diodes Made from Soluble Conducting Polymers[J].Nature,1992,357 (6378):477-479. |
| [4] | Bolink Henk J,Coronado Eugenio,Repetto Diego.Air Stable Hybrid Organic-inorganic Light Emitting Diodes Using ZnO as the Cathode[J].Appl Phys Lett,2007,91:223501. |
| [5] | Chen S Y,Chu T Y,Chen J F,et al.Stable Inverted Bottom-emitting Organic Electroluminescent Devices with Molecular Doping and Morphology Improvement[J].Appl Phys Lett,2006,89 (5):053518. |
| [6] | Huang J S,Li G,Wu E,et al.Achieving High-Efficiency Polymer White-Light-Emitting Devices[J].Adv Mater,2006,18:114-117. |
| [7] | Zhou G,Qian G,Ma L,et al.Polyfluorenes with Phosphonate Groups in the Side Chains as Chemosensors and Electroluminescent Materials[J].Macromolecules,2005,38:5416-5424. |
| [8] | Zhou G,Geng Y H,Cheng Y X,et al.Efficient Blue Electroluminescence from Neutral Alcohol-soluble Polyfluorenes with Aluminum Cathode[J].Appl Phys Lett,2006,89:233501. |
| [9] | Bolink Henk J,Coronado Eugenio,Orozco Javier.Efficient Polymer Light-Emitting Diode Using Air-Stable Metal Oxides as Electrodes[J].Adv Mater,2009,21:79-82. |
| [10] | Jang Sang Eok,Yook Kyoung Soo,Lee Jun Yeob.High Power Efficiency in Simplified Two Layer Blue Phosphorescent Organic Light-emitting Diodes[J].Org Electron,2010,11:1154-1157. |
| [11] | Choi Ho Won,Kim Soo Young.Enhancement of Hole Injection Using O2 Plasma-treated Ag Anode for Top-emitting Organic Light-emitting Diodes[J].Appl Phys Lett,2005,86:012104. |
| [12] | Huang J S,Xu Z,Yang Y.Low-Work-Function Surface Formed by Solution-Processed and Thermally Deposited Nanoscale Layers of Cesium Carbonate[J].Adv Funct Mater,2007,17:1966-1973. |
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%