کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6534934 | 49299 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Monitoring degradation mechanisms in PTB7:PC71BM photovoltaic cells by means of impedance spectroscopy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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![عکس صفحه اول مقاله: Monitoring degradation mechanisms in PTB7:PC71BM photovoltaic cells by means of impedance spectroscopy Monitoring degradation mechanisms in PTB7:PC71BM photovoltaic cells by means of impedance spectroscopy](/preview/png/6534934.png)
چکیده انگلیسی
We have used impedance spectroscopy technique to monitor degradation mechanisms in organic solar cells based on a blend of PTB7:PC71BM. We have measured the impedance of the cell on a periodical basis for almost four months, and experimental data have been modeled using three different circuits. The evolution of the circuital parameters gives information about the device dynamical mechanisms. We have observed at high voltages a low frequency feature that is more pronounced along days of measurement. This low frequency arc has been associated to charge accumulation that is related to a worsening of charge extraction through the contacts. The simultaneous increase of recombination and low frequency resistances at high voltages (around Voc) results in a decrease of the fill factor and therefore of the efficiency.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 144, January 2016, Pages 422-428
Journal: Solar Energy Materials and Solar Cells - Volume 144, January 2016, Pages 422-428
نویسندگان
Belén Arredondo, MarÃa B. MartÃn-López, Beatriz Romero, Ricardo Vergaz, Pablo Romero-Gomez, Jordi Martorell,