Excited state dynamics and exciton diffusion in triphenylamine/dicyanovinyl push-pull small molecule for organic optoelectronics
| العنوان: | Excited state dynamics and exciton diffusion in triphenylamine/dicyanovinyl push-pull small molecule for organic optoelectronics |
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| المؤلفون: | Maxim S. Pshenichnikov, Sergei A. Ponomarenko, Jie Min, Thomas L. C. Jansen, Benedito A. L. Raul, Nikolay M. Surin, Wenyan Yang, Olivier Douhéret, Yuriy N. Luponosov |
| المساهمون: | Optical Physics of Condensed Matter, Theory of Condensed Matter |
| المصدر: | Scientific Reports Scientific Reports, 10(1):21198. Nature Publishing Group |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Solar cells, Materials science, Photoluminescence, Exciton, Chemical physics, Optical spectroscopy, 02 engineering and technology, 010402 general chemistry, Triphenylamine, 01 natural sciences, Polymer solar cell, Article, chemistry.chemical_compound, Fluorescence spectroscopy, Multidisciplinary, business.industry, Relaxation (NMR), Excited states, Conical intersection, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Excited state, Density functional theory, Optoelectronics, 0210 nano-technology, business |
| الوصف: | Triphenylamine-based small push–pull molecules have recently attracted substantial research attention due to their unique optoelectronic properties. Here, we investigate the excited state de-excitation dynamics and exciton diffusion in TPA-T-DCV-Ph-F small molecule, having simple chemical structure with asymmetrical architecture and end-capped with electron-withdrawing p-fluorodicyanovinyl group. The excited state lifetime in diluted solutions (0.04 ns in toluene and 0.4 ns in chloroform) are found to be surprisingly shorter compared to the solid state (3 ns in PMMA matrix). Time-dependent density functional theory indicates that this behavior originates from non-radiative relaxation of the excited state through a conical intersection between the ground and singlet excited state potential energy surfaces. Exciton diffusion length of ~ 16 nm in solution processed films was retrieved by employing time-resolved photoluminescence volume quenching measurements with Monte Carlo simulations. As means of investigating the device performance of TPA-T-DCV-Ph-F, we manufactured solution and vacuum processed bulk heterojunction solar cells that yielded efficiencies of ~ 1.5% and ~ 3.7%, respectively. Our findings demonstrate that the short lifetime in solutions does not hinder per se long exciton diffusion length in films thereby granting applications of TPA-T-DCV-Ph-F and similar push–pull molecules in vacuum and solution processable devices. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2045-2322 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b53db6ab3003bfe957017888be12b8a4 https://hdl.handle.net/11370/ecb8bbc8-4086-41dc-bcda-6e7a7a3164de |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....b53db6ab3003bfe957017888be12b8a4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20452322 |
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