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NOGUCHI Yutaka
Department Undergraduate School , School of Science and Technology Position Professor |
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| Language | English |
| Publication Date | 2021/01 |
| Type | Academic Journal |
| Peer Review | Peer reviewed |
| Title | Enhancement of the molecular orientation of TPBi in coevaporated films of UGH‐2 host molecules |
| Contribution Type | Co-authored (other than first author) |
| Journal | Surface and Interface Analysis |
| Journal Type | Another Country |
| Publisher | Wiley |
| Volume, Issue, Page | 53(4),pp.460-465 |
| Total page number | 6 |
| Authorship | Last author,Corresponding author |
| International coauthorship | International coauthorship |
| Author and coauthor | Hewa Dewage Chandima Niroshan Gunawardana, Kohei Osada, Kaveenga Rasika Koswattage, Yutaka Noguchi |
| Details | In this study, we investigated the spontaneous orientation polarization (SOP) in coevaporated films of polar and nonpolar molecules. We found that the molecular orientation of TPBi in both UGH‐2 and CBP hosts was enhanced, though the apparent enhancement factor was small in the UGH‐2 host. The enhancement of the molecular orientation is attributed to the reduction of the electrostatic interaction between polar molecules (TPBi), which deteriorates SOP as previously reported. In addition, our results suggest that the SOP of TPBi is robust even in the UGH‐2 host, in contrast to the random orientation of Ir complexes in the UGH‐2 host. Considering a polyhedral shape of Ir complexes, the robust SOP of TPBi in the host molecules with a weak van der Waals interaction, such as UGH‐2, is possibly due to its disk‐like molecular shape. |
| DOI | https://doi.org/10.1002/sia.6933 |