Photogeneration and transport studies on differently polymerized n-vinylcarbazole polymers |
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| Institution: | 1. Istituto di Fotochimica e Radiazioni d''Alta Energia del Consiglio Nazionale delle Ricerche, Via de''Castagnoli, 1 40126 Bologna Italy;2. Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento, 35-56100 Pisa, Italy;1. College of Electronic Science & Engineering, Jilin University, Changchun 130012, Jilin, China;2. State Key Laboratory on Integrated Optoelectronics, Jilin University, Changchun 130012, Jilin, China;3. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, Jilin, China;4. KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;5. Faculty of Engineering, The University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom;1. Department of Chemistry, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 02707, Republic of Korea;2. Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea;3. Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute (KAERI), 29 Geumgu-gil, Jeongeup-si, Jeollabuk-do 56212, Republic of Korea;4. Department of Energy Science, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea;1. Department of Polymer Science and Engineering, Korea National University of Transportation, Chungju 27469, Republic of Korea;2. Department of Materials Science and Engineering, Korea National University of Transportation, Chungju 27469, Republic of Korea;3. Analytical Engineering Group, Samsung Advanced Institute of Technology, Suwon 16678, Republic of Korea;4. Department of IT Convergence, Korea National University of Transportation, Chungju 27469, Republic of Korea;5. Department of Materials Science and Chemical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan-si, Gyeonggi-do, 15588, Republic of Korea;1. Ioffe Institute, St. Petersburg, Russia;2. St. Petersburg State University, St. Petersburg, Russia |
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| Abstract: | Photogeneration and transport studies were carried out on carefully purified, poly(N-vinylcarbazole) (PVK) samples prepared with different initiators. The results were compared both with those obtained from commercial samples and those reported in the literature. The experimental mobility values obtained μ] = cm2/Vsec] were low compared with the “trap free” mobility value, recently reported (μ = 10−3cm2/Vsec). The presence of persistent impurities, formed during the polymerization procedure and bound to the polymer backbone, together with the presence of specific structural faults, could explain the rather low observed mobility values. The photoelectric yield for all the samples, except those prepared from EtAlCl2 (PVK-IV), is about 3 × 10−3. The higher value shown by the PVK-IV samples (10−2) could be ascribed to a lower concentration of traps for excitons (viz the so-called “second excimer site”). |
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