Transient electrically detected magnetic resonance spectroscopy applied to organic solar cells
| العنوان: | Transient electrically detected magnetic resonance spectroscopy applied to organic solar cells |
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| المؤلفون: | Felix Kraffert, Robert Bittl, Christoph Meier, Robert Steyrleuthner, Jan Behrends |
| المصدر: | Applied Physics Letters. 107:043302 |
| بيانات النشر: | AIP Publishing, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Photocurrent, Conductive polymer, Physics and Astronomy (miscellaneous), Organic solar cell, business.industry, Chemistry, Exciton, Photovoltaic effect, Molecular physics, law.invention, Organic semiconductor, law, Optoelectronics, Charge carrier, Electron paramagnetic resonance, business |
| الوصف: | The influence of light-induced paramagnetic states on the photocurrent generated by polymer:fullerene solar cells is studied using spin-sensitive techniques in combination with laser-flash excitation. For this purpose, we developed a setup that allows for simultaneous detection of transient electron paramagnetic resonance as well as transient electrically detected magnetic resonance (trEDMR) signals from fully processed and encapsulated solar cells. Combining both techniques provides a direct link between photoinduced triplet excitons, charge transfer states, and free charge carriers as well as their influence on the photocurrent generated by organic photovoltaic devices. Our results obtained from solar cells based on poly(3-hexylthiophene) as electron donor and a fullerene-based electron acceptor show that the resonant signals observed in low-temperature (T = 80 K) trEDMR spectra can be attributed to positive polarons in the polymer as well as negative polarons in the fullerene phase, indicating that both centers are involved in spin-dependent processes that directly influence the photocurrent. |
| تدمد: | 1077-3118 0003-6951 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69cf7af8d88f7debdbe4657bae268053Test https://doi.org/10.1063/1.4927446Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....69cf7af8d88f7debdbe4657bae268053 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10773118 00036951 |
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