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1. 太原理工大学 新材料界面科学与工程教育部重点实验室,山西 太原,030024
2. 太原理工大学 新材料工程技术研究中心,山西 太原,030024
3. 中国科学院 苏州纳米技术与纳米仿生研究所,江苏 苏州,215123
纸质出版日期:2012-4-10,
网络出版日期:2012-4-10,
收稿日期:2012-2-5,
修回日期:2012-3-7,
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林文晶, 苏文明, 张东煜, 周禾丰, 王华. 利用磷光敏化改善聚合物白光OLED性能[J]. 发光学报, 2012,33(4): 440-443
]LIN Wen-Jing, SU Wen-ming, ZHANG Dong-Yu, ZHOU He-feng, WANG Hua. Properties Improvement of Polymer White Organic Light Emitting Devices by Phosphorescence Sensitizer[J]. Chinese Journal of Luminescence, 2012,33(4): 440-443
林文晶, 苏文明, 张东煜, 周禾丰, 王华. 利用磷光敏化改善聚合物白光OLED性能[J]. 发光学报, 2012,33(4): 440-443 DOI: 10.3788/fgxb20123304.0440.
]LIN Wen-Jing, SU Wen-ming, ZHANG Dong-Yu, ZHOU He-feng, WANG Hua. Properties Improvement of Polymer White Organic Light Emitting Devices by Phosphorescence Sensitizer[J]. Chinese Journal of Luminescence, 2012,33(4): 440-443 DOI: 10.3788/fgxb20123304.0440.
基于新型聚合物白光材料PF-DTFO制备了一种聚合物白光发光二极管(PWOLED)
通过在聚合物发光层中掺杂蓝光磷光染料FIrpic
利用磷光敏化发光原理
改善器件电致发光性能。在敏化PWOLED中
掺杂的FIrpic染料作为给体将产生的三重态能量传递给白光聚合物的长波发射基团
进一步提高了长波基团的发光强度
改善了白光光谱
使基色更平衡并且光谱更稳定。驱动电压从8 V增加到16 V时
器件电致发光光谱基本不变
色坐标仅从(0.33
0.38)移动至(0.32
0.38)。敏化后的器件发光效率相对于未掺杂器件提高了38%。
Based on a new polymer of PF-DTFO
the novel polymer white light-emitting diode (PWOLED) was introduced with the structure of ITO/PEDOT:PSS/PF-DTFO/LiF/Al. Because of its excess blue emission
the modified PWOLEDs were developed by doping phosphorescence dye of FIrpic in emission layer. In the PWOLEDs
triplet excitons energy can transfer from FIrpic to long-wave emissive groups of PF-DTFO
which lead to an increased long-wave emission intensity. By using this phosphorescence sensitizer layer
both singlet and triplet excitons can be effectively employed
and the performance of the PWOLED was improved. The PWOLED shows a little change of CIE coordinate
which ranges from (0.33
0.38) to (0.32
0.38) as the driving voltage increased from 8 V to 16 V. Meanwhile
the device shows about 38% enhanced efficiency compared to that of unoptimized PWOLED.
聚合物有机发光二极管磷光敏化
polymerOLEDphosphorescence sensitizer
Bhansali U S, Jia H P, Lopez M A Q, et al. Controlling the carrier recombination zone for improved color stability in a two-dopant fluorophore/phosphor white organic light-emitting diode [J]. Appl. Phys. Lett., 2009, 94(20):203501-1-3.[2] Kamtekar K T, Monkman A P, Bryce M R. Recent advances in white organic light-emitting materials and devices (WOLEDs) [J]. Adv. Mater., 2010, 22(5):572-582.[3] Song Chunli, Xu Yang, Zhou Hefeng, et al. Synthesis and properties of a novel type of red-light organic electroluminescence material [J]. Chin. J. Lumin.(发光学报), 2011, 32(3):285-289 (in Chinese).[4] Wang Zhen, Chen Shuangwen, Zhou Xiang. Study on efficient blue and white organic light-emitting devices [J]. Chin. J. Lumin.(发光学报), 2011, 32(7):715-719 (in Chinese).[5] Wang Qi, Ma Dongge. Fabrication methods of white organic light-emitting diodes [J]. Chin. J. Liquid Crystals and Displays (液晶与显示), 2009, 24(5):617-629 (in Chinese).[6] Gustafsson G, Cao Y, Heeger A J, et al. Flexible light-emitting diodes made from soluble conducting polymers [J]. Nature, 1992, 357(6378):477-479.[7] Liu J, Zhou Q G, Cheng Y X, et al. White electroluminescence from a single-polymer system with simultaneous two-color emission: Polyfluorene as the blue host and 2,1,3-benzothiadiazole derivative as the orange dopant [J]. Adv. Funct. Mater., 2006, 16(7):957-965.[8] Xu Yang, Wang Hua, Song Chunli, et al. Synthesis and luminescence characteristics of near-white light-emitting copolymer [J]. Chin. J. Lumin.(发光学报), 2010, 31(2):274-278 (in Chinese).[9] Baldo M A, Thompson M E, Forrest S R. High efficiency fluorescent organic light emitting devices using aphosphorescent sensitizer [J]. Nature, 2000, 403(6771):750-753.[10] DAndrade B W, Baldo M A, Adachi C, et al. High-efficiency yellow double-doped organic light-emitting devices based on phosphor-sensitized fluorescence [J]. Appl. Phys. Lett., 2001, 79(7):1045-1047.[11] Shoustikov A A, You Y, Thompson M E. Electroluminescence color tuning by dye doping in organic light-emitting diodes [J]. IEEE Journal of Selected Topics in Quantum Electronics, 1998, 4(1):3-13.[12] Reineke S, Walzer K, Leo K. Triplet-exciton quenching in organic phosphorescent light-emitting diodes with Ir-based emitters [J]. Phys. Rev. B, 2007, 75(12):125328-1-13.[13] He G F, Pfeiffer M, Leo K, et al. High-efficiency and low-voltage p-i-n electrophosphorescent organic light-emitting diodes with double-emission layers [J]. Appl. Phys. Lett., 2004, 85(17):3911-3913.[14] Baldo M A, Adachi C, Forrest S R. Transient analysis of organic electrophosphorescence [J]. Phys. Rev. B, 2000, 62(16):10967-10977.
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