中国物理B ›› 2013, Vol. 22 ›› Issue (7): 77303-077303.doi: 10.1088/1674-1056/22/7/077303

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Color-stable, reduced efficiency roll-off hybrid white organic light emitting diodes with ultra high brightness

刘佰全a b, 陶洪a b, 苏跃举c, 高栋雨c, 兰林锋a b, 邹建华a b, 彭俊彪a b   

  1. a Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China;
    b State Key Laboratory of Luminescent Materials and Devices, Guangzhou 510640, China;
    c New Vision Opto-Electronic Technology Co., Ltd, Guangzhou 510030, China
  • 收稿日期:2012-12-31 修回日期:2013-02-22 出版日期:2013-06-01 发布日期:2013-06-01
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2009CB623604), the National Natural Science Foundation of China (Grant Nos. 61204087, 51173049, U0634003, 61036007, and 60937001), the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2011ZB0002 and 2011ZM0009), and China Postdoctoral Science Foundation.

Color-stable, reduced efficiency roll-off hybrid white organic light emitting diodes with ultra high brightness

Liu Bai-Quan (刘佰全)a b, Tao Hong (陶洪)a b, Su Yue-Ju (苏跃举)c, Gao Dong-Yu (高栋雨)c, Lan Lin-Feng (兰林锋)a b, Zou Jian-Hua (邹建华)a b, Peng Jun-Biao (彭俊彪)a b   

  1. a Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China;
    b State Key Laboratory of Luminescent Materials and Devices, Guangzhou 510640, China;
    c New Vision Opto-Electronic Technology Co., Ltd, Guangzhou 510030, China
  • Received:2012-12-31 Revised:2013-02-22 Online:2013-06-01 Published:2013-06-01
  • Contact: Zou Jian-Hua E-mail:zou1007@gmail.com
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2009CB623604), the National Natural Science Foundation of China (Grant Nos. 61204087, 51173049, U0634003, 61036007, and 60937001), the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2011ZB0002 and 2011ZM0009), and China Postdoctoral Science Foundation.

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摘要： High-brightness and color-stable two-wavelength hybrid white organic light emitting diodes (HWOLEDs) with the configuration of indium tin oxide (ITO)/N, N, N', N'-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD): tetrafluoro-tetracyanoqino dimethane (F4-TCNQ)/N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine (NPB)/4,4-N,N-dicarbazolebiphenyl (CBP): iridium (III) diazine complexes (MPPZ)2Ir(acac)/NPB/2-methyl-9,10-di(2-naphthyl)anthracene (MADN): p-bis(p-N,N-di-phenyl-aminostyryl)benzene (DSA-ph)/bis(10-hydroxybenzo[h] quinolinato)beryllium complex (Bebq2)/LiF/Al have been fabricated and characterized. The optimal brightness of the device is 69932 cd/m2 at a voltage of 13 V, and the Commission Internationale de l'Eclairage (CIE) chromaticity coordinates are almost constant during a large voltage change of 6-12 V. Furthermore, a current efficiency of 15.3 cd/A at an illumination-relevant brightness of 1000 cd/m2 is obtained, which rolls off slightly to 13.0 cd/A at an ultra high brightness of 50000 cd/m2. We attribute this great performance to wisely selecting an appropriate spacer together with effectively utilizing the combinations of exciton-harvested orange-phosphorescence/blue-fluorescence in the device. Undoubtedly, this is one of the most exciting results in two-wavelength HWOLEDs up to now.

关键词: white light, color stability, efficiency roll-off, high brightness

Abstract: High-brightness and color-stable two-wavelength hybrid white organic light emitting diodes (HWOLEDs) with the configuration of indium tin oxide (ITO)/N, N, N', N'-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD): tetrafluoro-tetracyanoqino dimethane (F4-TCNQ)/N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine (NPB)/4,4-N,N-dicarbazolebiphenyl (CBP): iridium (III) diazine complexes (MPPZ)2Ir(acac)/NPB/2-methyl-9,10-di(2-naphthyl)anthracene (MADN): p-bis(p-N,N-di-phenyl-aminostyryl)benzene (DSA-ph)/bis(10-hydroxybenzo[h] quinolinato)beryllium complex (Bebq2)/LiF/Al have been fabricated and characterized. The optimal brightness of the device is 69932 cd/m2 at a voltage of 13 V, and the Commission Internationale de l'Eclairage (CIE) chromaticity coordinates are almost constant during a large voltage change of 6-12 V. Furthermore, a current efficiency of 15.3 cd/A at an illumination-relevant brightness of 1000 cd/m2 is obtained, which rolls off slightly to 13.0 cd/A at an ultra high brightness of 50000 cd/m2. We attribute this great performance to wisely selecting an appropriate spacer together with effectively utilizing the combinations of exciton-harvested orange-phosphorescence/blue-fluorescence in the device. Undoubtedly, this is one of the most exciting results in two-wavelength HWOLEDs up to now.

Key words: white light, color stability, efficiency roll-off, high brightness

中图分类号:  (Multilayers)

  • 73.21.Ac
73.40.Lq (Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions) 73.40.Jn (Metal-to-metal contacts) 73.61.Ph (Polymers; organic compounds)