TY - JOUR
T1 - A quick operating organic EL device using Ru complex light-emitting layer with 2,5-bis(4-tert-butyl-2-benz-oxazolyl) thiophene electron transport layer
AU - Shiratori, Seimei
N1 - Funding Information:
This work was partly supported by TEPCO Research Foundation and Kurata Science Foundation 1999–2000.The authors thank Dr. Erik S. Handy and Prof. M.F. Rubner of Massacusetts Institute of Technology for the discussion and advice on this study. The author thanks Goh Katayama, an undergraduate student of Keio University for help with the experiment.
PY - 2001/8/22
Y1 - 2001/8/22
N2 - Recently, solid-state light-emitting devices based on small molecules such as Ru(bpy)3(PF6)2 and its derivatives attracted attention as electro luminescence (EL) materials because the luminance shows as high as l600 cd m-2 at only 5 V with spin-cast films in air without sealing the devices. Devices based on these materials operate at low voltage (2.5-5 V), however, response of light emission after applying voltage is rather slow, suggesting a similar mechanism with liquid electro-generated chemiluminescence (ECL) cells. In this paper, we added thin electron transporting layer, 2,5-bis(5-tert-butyl-2-benz-oxazolyl) thiophene (BBOT) film (ca. 200 nm) between Ru complex light-emitting layer and Al electrode. As a result, much quicker response was achieved than the ruthenium(II) complex EL devices without adding the BBOT electron transporting layer.
AB - Recently, solid-state light-emitting devices based on small molecules such as Ru(bpy)3(PF6)2 and its derivatives attracted attention as electro luminescence (EL) materials because the luminance shows as high as l600 cd m-2 at only 5 V with spin-cast films in air without sealing the devices. Devices based on these materials operate at low voltage (2.5-5 V), however, response of light emission after applying voltage is rather slow, suggesting a similar mechanism with liquid electro-generated chemiluminescence (ECL) cells. In this paper, we added thin electron transporting layer, 2,5-bis(5-tert-butyl-2-benz-oxazolyl) thiophene (BBOT) film (ca. 200 nm) between Ru complex light-emitting layer and Al electrode. As a result, much quicker response was achieved than the ruthenium(II) complex EL devices without adding the BBOT electron transporting layer.
KW - Chemi luminescence
KW - Electro luminescence
KW - Electron transport
KW - Light emitting device
KW - Ruthenium
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U2 - 10.1016/S0921-5107(01)00598-0
DO - 10.1016/S0921-5107(01)00598-0
M3 - Article
AN - SCOPUS:0035934365
VL - 85
SP - 149
EP - 153
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
SN - 0921-5107
IS - 2-3
ER -