以三苯胺为中心核,第二代的齐聚咔唑为树枝,设计合成了树枝状主体材料H2A.树枝状化合物H2A具有良好的成膜性和优异的热稳定性(Tg=351℃),其三线态能级为2.84 eV.采用H2A作为蓝光铱配合物双(4,6-氟苯基吡啶-N,C2)吡啶甲酰合铱(FIrpic)的主体材料,制得的蓝光磷光器件的启亮电压为4.8V,最大功率效率为7.0 lm/W,两项指标均优于以4,4',4''-三(N-咔唑基)三苯胺(TCTA)为主体材料的相应器件(6.0V,6.1 lm/W).
参考文献
| [1] | Baldo M A,O'Brien D F,You Y,et al.Highly Efficient Phosphorescent Emission from Organic Electroluminescent Devices[J].Nature,1998,395:1S1-154. |
| [2] | Adachi C,Baldo M A,Thompson M E,et al.Nearly 100％ Internal Phosphorescence Efficiency in an Organic Light-emitting Device[J].J Appl Phys,2001,90(10):5048-5051. |
| [3] | Baldo M A,Adachi C,Forrest S R.Transient Analysis of Organic Electrophosphorescence Ⅱ.Transient analysis of Triplettriplet Annihilation[J].Phys Rev B,2000,62(16):10967-10977. |
| [4] | Tao Y T,Yang C L,Qin J G.Organic Host Materials for Phosphorescent Organic Light-emitting Diodes[J].Chem Soc Rev,2011,40 (5):2943-2970. |
| [5] | Mi B X,Gao Z Q,Liao Z J,et al.Molecular Hosts for Triplet Emitters in Organic Light-emitting Diodes and the Corresponding Working Principle[J].Sci China Chem,2010,53 (8):1679-1694. |
| [6] | Tao Y,Wang Q,Yang C,etal.A Simple Carbazole/Oxadiazole Hybrid Molecule:an Excellent Bipolar Host for Green and Red Phosphorescent OLEDs[J].Angew Chem Int Ed,2008,47(42):8104-8107. |
| [7] | Chou H H,Cheng C H.A Highly Efficient Universal Bipolar Host for Blue,Green,and Red Phosphorescent OLEDs[J].Adv Mater,2010,22(22):2468-2471. |
| [8] | Kim D H,Cho N S,Oh H Y,et al.Highly Efficient Red Phosphorescent Dopants in Organic Light-Emitting Devices[J].Adv Mater,2011,23(24):2721-2726. |
| [9] | Lu K Y,Chou H H,Hsieh C H,et al.Wide-Range Color Tuning of Iridium Biscarbene Complexes from Blue to Red by Different N ^ N Ligands:an Alternative Route for Adjusting the Emission Colors[J].Adv Mater,2011,23(42):4933-4937. |
| [10] | Su S-J,Gonmori E,Sasabe H,et al.Highly Efficient Organic Blue-and White-Light-Emitting Devices Having a Carrier-and Exciton-Confining Structure for Reduced Efficiency Roll-Off[J].Adv Mater,2008,20(21):4189 4194. |
| [11] | Yeh S J,Wu M F,Chen C T,et al.New Dopant and Host Materials for Blue-light-emitting Phosphorescent Organic Electroluminescent Devices[J].Adv Mater,2011,23 (2):285-308. |
| [12] | Baldo M A,Lamansky S,Burrows P E,et al.Very High-efficiency Green Organic Light-emitting Devices Based on Electrophosphorescence[J].Appl Phys Lett,1999,75 (1):4-6. |
| [13] | Adachi C,Kwong R C,Djurovich P,et al.Endothermic Energy Transfer:a Mechanism for Generating Very Efficient High-energy Phosphorescent Emission in Organic Materials[J].Appl Phys Lett,2001,79 (13):2082-2084. |
| [14] | Ding J Q,Zhang B H,Lu J H,et al.Solution-Processable Carbazole-Based Conjugated Dendritic Hosts for Power-Efficient Blue-Electrophosphorescent Devices[J].Adv Mater,2009,21 (48):4983-4986. |
| [15] | Tsai M H,Hong Y H,Chang C H,et al.3-(9-Carbazolyl) carbazoles and 3,6-Di(9-carbazolyl) carbazoles as Effective Host Materials for Efficient Blue Organic Electrophosphorescence[J].Adv Mater,2007,19 (6):862-866. |
| [16] | Yook K S,Jang S E,Jeon S O,et al.Fabrication and Efficiency Improvement of Soluble Blue Phosphorescent Organic Light-Emitting Diodes Using a Multilayer Structure Based on an Alcohol-Soluble Blue Phosphorescent Emitting Layer[J].Adv Mater,2010,22(40):4479-4483. |
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%