TY - JOUR
T1 - Molecular orientation induced by high-speed substrate transfer during vacuum vapor deposition of organic films
AU - Matsushima, Toshinori
AU - Murata, Hideyuki
N1 - Funding Information:
The authors are grateful to Tokyo Research Laboratory, TOSOH Corporation and Frontier Materials Chemistry Group, Sagami Chemical Research Center for providing us with MPT, an electron-transport material. This work is supported by Grants-in-Aid for Scientific Research (Grant Nos. 21760005 , 20241034 , and 20108012 ). Part of this work is based on “Development of the next generation large-scale organic EL display basic technology (Green IT Project)” contracted with New Energy and Industrial Technology Development Organization (NEDO). This research is supported by the Japan Society for the Promotion of Science (JSPS) through its “Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST Program).
PY - 2012/2
Y1 - 2012/2
N2 - The authors investigate a relationship between substrate transfer speeds during vacuum vapor deposition and orientation characteristics of organic molecules. Results show that rod-shaped molecules of alpha-sexithiophene (α-6T) are oriented in a substrate transfer direction and an absorption dichroic ratio of 1.44 is obtained from the oriented α-6T molecule film when a high substrate transfer speed of 4 m s-1 is used. By combining the substrate transfer technique with homoepitaxial growth of α-6T molecules on a rubbed surface, the absorption dichroic ratio further increases to 4.29. Polarized electroluminescence (EL) characteristics are investigated using rod-shaped molecules of 4,4′-bis[4-(di-p-tolylamino)styryl]biphenyl (DPAVBi) as a light-emitting hole-transport layer. An EL dichroic ratio of 2.12 is obtained due to an orientation of DPAVBi molecules caused by combining two techniques.
AB - The authors investigate a relationship between substrate transfer speeds during vacuum vapor deposition and orientation characteristics of organic molecules. Results show that rod-shaped molecules of alpha-sexithiophene (α-6T) are oriented in a substrate transfer direction and an absorption dichroic ratio of 1.44 is obtained from the oriented α-6T molecule film when a high substrate transfer speed of 4 m s-1 is used. By combining the substrate transfer technique with homoepitaxial growth of α-6T molecules on a rubbed surface, the absorption dichroic ratio further increases to 4.29. Polarized electroluminescence (EL) characteristics are investigated using rod-shaped molecules of 4,4′-bis[4-(di-p-tolylamino)styryl]biphenyl (DPAVBi) as a light-emitting hole-transport layer. An EL dichroic ratio of 2.12 is obtained due to an orientation of DPAVBi molecules caused by combining two techniques.
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U2 - 10.1016/j.orgel.2011.10.023
DO - 10.1016/j.orgel.2011.10.023
M3 - Article
AN - SCOPUS:83455220748
SN - 1566-1199
VL - 13
SP - 222
EP - 229
JO - Organic Electronics
JF - Organic Electronics
IS - 2
ER -