Low voltage efficient simple p-i-n type electrophosphorescent green organic light-emitting devices

被引:29
作者
Kim, Sun Young [1 ]
Jeon, Woo Sik [1 ]
Park, Tae Jin [1 ]
Pode, Ramchandra [2 ]
Jang, Jin [1 ]
Kwon, Jang Hyuk [1 ]
机构
[1] Kyung Hee Univ, Dept Informat Display, Dongdaemoon Ku, Seoul 130701, South Korea
[2] Kyung Hee Univ, Dept Phys, Dongdaemoon Ku, Seoul 130701, South Korea
关键词
electroluminescent devices; organic compounds; organic light emitting diodes; phosphorescence; p-i-n photodiodes; ELECTROLUMINESCENT DEVICES; INJECTING LAYER; DIODES;
D O I
10.1063/1.3114378
中图分类号
O59 [应用物理学];
学科分类号
摘要
We present simple p-i-n structures with double-emitting and mixed-emitting layers for highly efficient phosphorescent green devices. Using a wide band-gap hole transporting material of 4,4(')4(')-tris(N-carbazolyl)-triphenylamine and a wide band-gap electron transporting material of bis[2-(2-hydroxyphenyl)-pyridine]beryllium, the bilayered p-i-n structure with no heterointerface barriers has been realized. A very low onset voltage value of 2.4 V corresponding to the energy of 2.4 eV of green electroluminescence, which is close to the photon energy of dopant emitting molecules (2.3-2.4 eV), is achieved in this simple p-i-n device configuration. Maximum current- and power-efficiency values of 53.3 cd/A and 61.4 lm/W and low rolloff of current efficiency (6%) are demonstrated in the simple p-i-n green phosphorescent devices, promising for the practical and economical high brightness applications.
引用
收藏
页数:3
相关论文
共 18 条
  • [1] High-efficiency organic electrophosphorescent devices with tris(2-phenylpyridine)iridium doped into electron-transporting materials
    Adachi, C
    Baldo, MA
    Forrest, SR
    Thompson, ME
    [J]. APPLIED PHYSICS LETTERS, 2000, 77 (06) : 904 - 906
  • [2] Operational stability of electrophosphorescent devices containing p and n doped transport layers
    D'Andrade, BW
    Forrest, SR
    Chwang, AB
    [J]. APPLIED PHYSICS LETTERS, 2003, 83 (19) : 3858 - 3860
  • [3] Organic electroluminescent devices with a vacuum-deposited Lewis-acid-doped hole-injecting layer
    Endo, J
    Matsumoto, T
    Kido, J
    [J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2002, 41 (3B): : L358 - L360
  • [4] Red electrophosphorescence from polymer doped with iridium complex
    Gong, X
    Ostrowski, JC
    Bazan, GC
    Moses, D
    Heeger, AJ
    [J]. APPLIED PHYSICS LETTERS, 2002, 81 (20) : 3711 - 3713
  • [5] Very high-efficiency and low voltage phosphorescent organic light-emitting diodes based on a p-i-n junction
    He, GF
    Schneider, O
    Qin, DS
    Zhou, X
    Pfeiffer, M
    Leo, K
    [J]. JOURNAL OF APPLIED PHYSICS, 2004, 95 (10) : 5773 - 5777
  • [6] High-efficiency and low-voltage p-i-n electrophosphorescent organic light-emitting diodes with double-emission layers
    He, GF
    Pfeiffer, M
    Leo, K
    Hofmann, M
    Birnstock, J
    Pudzich, R
    Salbeck, J
    [J]. APPLIED PHYSICS LETTERS, 2004, 85 (17) : 3911 - 3913
  • [7] Influence of the thickness and doping of the emission layer on the performance of organic light-emitting diodes with PiN structure
    Huang, JS
    Blochwitz-Nimoth, J
    Pfeiffer, M
    Leo, K
    [J]. JOURNAL OF APPLIED PHYSICS, 2003, 93 (02) : 838 - 844
  • [8] Low roll-off efficiency green phosphorescent organic light-emitting devices with simple double emissive layer structure
    Jeon, Woo Sik
    Park, Tae Jin
    Kim, Sun Young
    Pode, Ramchandra
    Jang, Jin
    Kwon, Jang Hyuk
    [J]. APPLIED PHYSICS LETTERS, 2008, 93 (06)
  • [9] Highly efficient bilayer green phosphorescent organic light emitting devices
    Jeon, Woo Sik
    Park, Tae Jin
    Park, Jung Joo
    Kim, Sun Young
    Jang, Jin
    Kwon, Jang Hyuk
    Pode, Ramchandra
    [J]. APPLIED PHYSICS LETTERS, 2008, 92 (11)
  • [10] Low roll-off of efficiency at high current density in phosphorescent organic light emitting diodes
    Kang, Jae-Wook
    Lee, Se-Hyung
    Park, Hyung-Dol
    Jeong, Won-Ik
    Yoo, Kyung-Mo
    Park, Young-Seo
    Kim, Jang-Joo
    [J]. APPLIED PHYSICS LETTERS, 2007, 90 (22)