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http://hdl.handle.net/10119/10872
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| Title: | Molecular order, charge injection efficiency and the role of intermolecular polar bonds at organic/organic heterointerfaces |
| Authors: | Wang, Y.
Matsushima, T.
Murata, H.
Fleurence, A.
Yamada-Takamura, Y.
Friedlein, R. |
| Keywords: | ultraviolet photoelectron spectroscopy
electronic structure
hole-only devices
rubbing
molecular orientation |
| Issue Date: | 2012-06-13 |
| Publisher: | Elsevier |
| Magazine name: | Organic Electronics |
| Volume: | 13 |
| Number: | 10 |
| Start page: | 1853 |
| End page: | 1858 |
| DOI: | 10.1016/j.orgel.2012.05.038 |
| Abstract: | The effect of orientational changes in thin films of the non-crystalline hole transport material α-N-N′-diphenyl N-N″-bis(1 naphthayl)-1,1′-biphenyl-4,4′-diamine (α-NPD) on the energy level alignment and the film electronic structure has been investigated by angle-resolved ultraviolet photoelectron spectroscopy and related to the transport characteristics of hole-only devices. Changes in the anisotropic α-sexithiophene (α-6T) substrate from a “standing” to a “flat” molecular orientation induced by mechanical rubbing lead to molecular order and a preferential orientation in subsequently deposited thin α-NPD films and cause a reduction of the charge injection barrier at the organic/organic interface. The results show that the height of this barrier is determined by the surface dipoles of the individual organic films that relate to the orientation of intramolecular polar bonds at the interface. |
| Rights: | NOTICE: This is the author's version of a work accepted for publication by Elsevier. Y. Wang, T. Matsushima, H. Murata, A. Fleurence, Y. Yamada-Takamura, R. Friedlein, Organic Electronics, 13(10), 2012, 1853-1858, http://dx.doi.org/10.1016/j.orgel.2012.05.038 |
| URI: | http://hdl.handle.net/10119/10872 |
| Material Type: | author |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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