主要通过红绿磷光材料R-4B和GIr1掺杂的方法,制备了黄光OLED器件,器件结构为ITO/MoO3(X)/NPB (40nm)/TCTA(10nm)/CBP:GIr1 14％:R-4B2％ (30nm)/BCP(10nm)/Alq3 (40nm)/LiF(1 nm)/ Al(100nm),TCTA和BCP分别为电子和空穴阻挡材料,同时结合TCTA和BCP对载流子的高效阻挡作用,研究了MoO3对器件效率和稳定性的影响.发现当增加MoO3的厚度为90nm时,在较大的电压范围内,器件都具有较高的效率和色坐标稳定性.在电流密度为7.13mA/cm2时,器件达到最高电流效率29.2cd/A,亮度为2081cd/m2;电流密度为151.7mA/cm2时,获得最高亮度为24430cd/m2,电流效率为16.0cd/A;器件色坐标稳定性较好,当电压为5、10、15V时,色坐标分别为(0.5020,0.4812)、(0.4862,0.4962)、(0.4786,0.5027).器件性能的改善主要归因于载流子注入与传输的平衡以及阻挡层对发光区域的有效限定.
参考文献
| [1] | Sedat Nizamoglu;Hilmi Volkan Demir .Forster resonance energy transfer enhanced color-conversion using colloidal semiconductor quantum dots for solid state lighting[J].Applied physics letters,2009(15):151111-1-151111-3. |
| [2] | Sheng Liu;Jianghui Yang;Zhiyin Gan;Xiaobing Luo .Structural optimization of a microjet based cooling system for high power LEDs[J].International Journal of Thermal Sciences,2008(8):1086-1095. |
| [3] | He G X;Xu J;Yan H F .Spectral optimization of warmwhite light-emitting diode lamp with both color rendering index (CRI) and special CRI of R9 above 90[J].AIP Advances,2011,1(03):0321601-0321607. |
| [4] | Chunmiao Han;Cuohua Xie;Hui Xu;Zhensong Zhang;Linghai Xie;Yi Zhao;Shiyong Liu;Wei Huang .A Single Phosphine Oxide Host for High-Efficiency White Organic Light-Emitting Diodes with Extremely Low Operating Voltages and Reduced Efficiency Roll-Off[J].Advanced Materials,2011(21):2491-2496. |
| [5] | Chun-Jen Weng .Advanced thermal enhancement and management of LED packages[J].International Communications in Heat and Mass Transfer: A Rapid Communications Journal,2009(3):245-248. |
| [6] | Shuming Chen;Guiping Tan;Wai-Yeung Wong;Hoi-Sing Kwok .White Organic Light-Emitting Diodes with Evenly Separated Red, Green, and Blue Colors for Efficiency/Color-Rendition Trade-Off Optimization[J].Advanced functional materials,2011(19):3785-3793. |
| [7] | 牛晶华,彭俊彪.电压控制发光颜色的有机电致发光器件[J].功能材料,2010(01):12-13. |
| [8] | Soon Ok Jeon;Kyoung Soo Yook;Chul Woong Joo;Jun Yeob Lee .Highly efficient single-layer phosphorescent white organic light-emitting diodes using a spirofluorene-based host material[J].Optics Letters,2009(4):407-409. |
| [9] | Shen, C.;Yang, Y.;Jin, S.;Ming, J.;Feng, H.;Xu, Z. .White light-emitting diodes using blue and yellow-orange-emitting phosphors[J].Optik: Zeitschrift fur Licht- und Elektronenoptik: = Journal for Light-and Electronoptic,2010(16):1487-1491. |
| [10] | 毕长栋,张方辉,张麦丽,马颖.有机材料DCJTB在分层点粉中对白光LED发光特性的影响[J].功能材料,2011(10):1924-1926. |
| [11] | 王志军,李盼来,王颖,杨志平,郭庆林.白光LED用LiBaBO3：Eu2+材料发光特性研究[J].物理学报,2009(02):1257-1260. |
| [12] | 王峰,黄小辉,王怀兵,刘建平,范亚明,祝运芝,金铮.GaN基低色温高显色白光LED[J].光谱学与光谱分析,2011(06):1446-1449. |
| [13] | Kalinowski, J;Cocchi, M;Virgili, D;Tattori, V;Williams, JAG .Mixing of excimer and exciplex emission: A new way to improve white light emitting organic electrophosphorescent diodes[J].Advanced Materials,2007(22):4000-4005. |
| [14] | Florian Lindla;Manuel Boesing;Christoph Zimmermann;Frank Jessen;Philipp van Gemmern;Dietrich Bertram;Dietmar Keiper;Nico Meyer;Michael Heuken;Holger Kalisch;Rolf H. Jansen .Highly efficient yellow organic light emitting diode based on a layer-cross faded emission layer allowing easy color tuning[J].Applied physics letters,2009(21):213305-1-213305-3. |
| [15] | Brian W. D'Andrade;Marc A. Baldo;Chihaya Adachi;Jason Brooks;Mark E. Thompson;Stephen R. Forrest .High-efficiency yellow double-doped organic light-emitting devices based on phosphor-sensitized fluorescence[J].Applied physics letters,2001(7):1045-1047. |
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%