Temperature effects on photoluminescence of poly [2-methoxy-5-(20-ethyl-hexyloxy)-1,4-phenylene vinylene] |
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| Affiliation: | 1. Institute of Optoelectronics, Northern Jiaotong University, Beijing 100044, PR China;2. ShenYang University of Technology, ShenYang 130021, PR China;3. Postdoctoral Working Station of Zhong-Huan San-Jin Ltd., Tianjin 300191, PR China;1. Department of Chemical Engineering and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan, R.O.C;2. Department of Materials Engineering, Kun Shan University, Tainan 710, Taiwan, R.O.C;3. Institute of Materials Science and Engineering, National Central University, Taiwan, R.O.C;4. Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan, R.O.C;1. Faculty of Physics, “Alexandru Ioan Cuza” University, Bd. Carol I, no 11, 700506, Iasi, Romania;3. Faculty of Mechanical Engineering, Mechatronics, Management, “Stefan cel Mare” University, Str. Universităţii 13, Suceava 720229, Romania;1. Nanotechnology Research Laboratory, Department of Physics, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia;2. Department of Physics, Faculty of Education at Al-Mahweet, Sana''a University, Al-Mahweet, Yemen;3. Department of Physics, Faculty of Education, Ain Shams University, Roxy 11757, Cairo, Egypt;4. Department of Physics, Faculty of Science, Zarqa University, Zarqa 13132, Jordan;1. Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, USA;2. School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, AZ, USA;1. Faculty of Mathematics, Physics and Informatics, University of Gdańsk, Wita Stwosza 57, 80-308 Gdańsk, Poland;2. Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland;3. Center for Commercialization of Fluorescence Technology, University of North Texas, Health Science Center, 3500 Camp Bowie Boulevard, Fort Worth, TX 76107, United States |
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| Abstract: | We present photoluminescence studies as a function of temperature from poly [2-methoxy-5-(20-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV). The photoluminescence transition energies are red-shifted with decreasing temperatures that can be explained by the suppression of the torsional motion in the polymer backbone, which increased the effective conjugation length of the polymer. The enhancement of the relative intensity of the 0–1 to 0–0 vibronic band can be attributed to the formation of aggregates in coincidence with the vibronic 0–1 bands. |
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