Magneto-optical behaviors at a 2-D ferromagnetic/organic semiconductor interface for singlet fission |
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| Affiliation: | 1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing JiaoTong University, Beijing 100044, China;2. College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China;1. School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi, 440-746, South Korea;2. Advanced Materials R&D, LG Chem Research Park, 188, Munji-ro, Yuseong-gu, Daejeon, South Korea;1. CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520-IEMN, Univ. Lille, 59000 Lille, France;2. University of Monastir, Department of Physics, Microelectronics and Instrumentation Laboratory, Av de l''environnement, 5019 Monastir, Tunisia;1. Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea;2. Chemistry, Imperial College London, London, SW7 2AZ, United Kingdom;3. Department of Materials Engineering and Convergence Technology and ETI, Gyeongsang National University, Jinju, 660-701, Republic of Korea;4. Department of Polymer Science & Engineering and Department of IT Convergence, Korea National University of Transportation, 50 Daehak-Ro, Chungju, 27469, Republic of Korea;1. Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, PR China;2. Laboratory of Materials Science, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, PR China |
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| Abstract: | This article reports the magneto-optical effects on the singlet fission of the p-type organic semiconductor, tetracene, from a ferromagnetic/semiconductor interface between thin films of cobalt and tetracene. We experimentally show that this interface has two effects on the thin films of tetracene: spin interactions and electrical polarization. The experimental tools used to study the interface include magnetic field effect photoluminescence (MFEPL), photoluminescence and absorption. Spin interaction effects are shown by MFEPL data, where we observe a large increase in the maximum MFEPL when cobalt is introduced, as well as changes in the hyperfine interactions at low magnetic fields. Electrical polarization is analyzed with photoluminescence and absorption measurements, showing small changes in the energy difference between the HOMO and LUMO levels of tetracene, as well as an increase in the electron-phonon coupling in tetracene. Also, electrical polarization is shown to increase electrical interactions between tetracene molecules. Therefore, we conclude that using spin interactions and electrical polarization from the ferromagnetic/organic semiconductor interface can tune the properties of tetracene, ultimately enhancing singlet fission. This work gives new insight to understand the singlet fission process using a ferromagnetic interface. These changes can be further utilized in photovoltaic applications based on this singlet fission material and be applied to other similar types of singlet fission organic semiconductors. |
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| Keywords: | Singlet fission Photovoltaic Interface Organic Magnetic field effect Magnetic field effect photoluminescence OPV" },{" #name" :" keyword" ," $" :{" id" :" kwrd0050" }," $$" :[{" #name" :" text" ," _" :" Organic photovoltaic PCE" },{" #name" :" keyword" ," $" :{" id" :" kwrd0060" }," $$" :[{" #name" :" text" ," _" :" Power conversion energy IQE" },{" #name" :" keyword" ," $" :{" id" :" kwrd0070" }," $$" :[{" #name" :" text" ," _" :" Internal quantum Efficiency |
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