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Site-selective fluorescence and hole-burning spectroscopy of MTHF glasses doped with tetracene or pentacene |
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| Affiliation: | 1. College of Physics, Qingdao University, Qingdao 266071, China;2. National Demonstration Center for Experiment Applied Physics Education, Qingdao 266071, China;3. College of Physics, University-Industry Joint Center for Ocean Observation and Broadband Communication Qingdao University, Qingdao 266071, China;1. IMEM-CNR Parco Area delle Scienze 37/A, 43124 Parma, Italy;2. Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy;3. Department of Electrical Engineering and Information Technology, University Federico II, Naples, Italy;4. King Abdullah University of Science and Technology, Thuwal, Saudi Arabia;5. Department of Experimental and Clinical Medicine, University of Magna Graecia, 88100 Catanzaro, Italy |
| Abstract: | Site-selective fluorescence spectra of tetracene (TC) doped in a MTHF glass have been recorded as a function of excitation energy. Based upon the true inhomogeneous absorption profile of the TC S1 ← S0 origin determined via vibrational ZP emission intensities the true phonon wing has been evaluated employing an iterative numerical spectral convolution procedure. It is found that both phonon spectra and Debye-Waller factor are virtually constant (α = 0.55 ± 0.08) across the inhomogeneous absorption band as are hole-burning yields in MTHF:TC glasses if probed in the zero-phonon line fluorescence excitation mode. It is concluded that the distributions of both the rate constant for NPHB and the strength of electron-phonon coupling are uncorrelated with the electronic site excitation energies. |
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