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Photo- and field-induced charge-separation and phosphorescence quenching in organometallic complex Ir(ppy)3
| Title: | Photo- and field-induced charge-separation and phosphorescence quenching in organometallic complex Ir(ppy)3 |
| Authors: | Mehata, Mohan Singh Browse this author | | Ohta, Nobuhiro Browse this author |
| Keywords: | dissociation | | iridium compounds | | organometallic compounds | | phosphorescence | | phosphors | | photoexcitation | | photoluminescence | | radiation quenching | | Stark effect | | ultraviolet spectra | | visible spectra |
| Issue Date: | 2-May-2011 |
| Publisher: | American Institute of Physics |
| Journal Title: | Applied Physics Letters |
| Volume: | 98 |
| Issue: | 18 |
| Start Page: | 181910 |
| Publisher DOI: | 10.1063/1.3582916 |
| Abstract: | Electric field effects on absorption and photoluminescence (PL) spectra of organometallic phosphorescent emitter Ir(ppy)3, {tris[2-phenylpyridinato-C2,N] iridium (III)} doped in a film of polymethyl methacrylate (PMMA) have been confirmed at temperatures in the range of 40-295 K. Field-induced quenching of PL observed for Ir(ppy)3 is attributed to the decrease both of emitting state population and of the lifetime of PL. The quenching is independent of excitation energy as well as temperature. Field-assisted charge separation or dissociation of electron-hole (e-h) pair produced by photoexcitation may decrease the population of the emitting state. The Stark shifts on absorption and PL spectra have also been analyzed. |
| Rights: | Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 98, 181910 (2011) and may be found at https://dx.doi.org/10.1063/1.3582916 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/45543 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 太田 信廣
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