TY - JOUR
T1 - Organic electrophosphorescent devices with mixed hole transport material as emission layer
AU - Matsushima, Hidenobu
AU - Naka, Shigeki
AU - Okada, Hiroyuki
AU - Onnagawa, Hiroyoshi
N1 - Funding Information:
This work was partly supported by the Japan Science and Technology (JST) Corporation.
PY - 2005/5
Y1 - 2005/5
N2 - We report on the reduction of driving voltage in organic electrophosphorescent devices with mixed hole transport material as emission layer. The emission layer was mixed with N, N′-diphenyl-N,N′-(3-methylphenyl)-[1,1′-biphenyl]-4, 4′-diamine (TPD) as a hole-transport material, 4,4′-bis(9-carbazolyl)-biphenyl (CBP) as a host material for a phosphorescent material, tris(2-phenylpyridine) iridium (Ir(ppy)3) as a phosphorescent material and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (bathocuproine: BCP) as an electron-transport material. The emission occurred from Ir(ppy)3 and was independent on the ratio of TPD and CBP. For triple-layered device with the TPD:CBP mixing ratio of 10:90, maximum luminance obtained was 104,000 cd/m2 at V=12 V, J=490 mA/cm2. Maximum efficiency was 20 lm/W at 3.1 mA/cm2.
AB - We report on the reduction of driving voltage in organic electrophosphorescent devices with mixed hole transport material as emission layer. The emission layer was mixed with N, N′-diphenyl-N,N′-(3-methylphenyl)-[1,1′-biphenyl]-4, 4′-diamine (TPD) as a hole-transport material, 4,4′-bis(9-carbazolyl)-biphenyl (CBP) as a host material for a phosphorescent material, tris(2-phenylpyridine) iridium (Ir(ppy)3) as a phosphorescent material and 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (bathocuproine: BCP) as an electron-transport material. The emission occurred from Ir(ppy)3 and was independent on the ratio of TPD and CBP. For triple-layered device with the TPD:CBP mixing ratio of 10:90, maximum luminance obtained was 104,000 cd/m2 at V=12 V, J=490 mA/cm2. Maximum efficiency was 20 lm/W at 3.1 mA/cm2.
KW - Carrier mobility
KW - Organic electrophosphorescent device
KW - Time-of-flight
UR - http://www.scopus.com/inward/record.url?scp=13844315876&partnerID=8YFLogxK
U2 - 10.1016/j.cap.2003.11.091
DO - 10.1016/j.cap.2003.11.091
M3 - 学術論文
AN - SCOPUS:13844315876
SN - 1567-1739
VL - 5
SP - 305
EP - 308
JO - Current Applied Physics
JF - Current Applied Physics
IS - 4
ER -