Alfonsina Abat Amelenan Torimtubun, J. Pallarès, L. Marsal
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Analysing the Efficiency Enhancement of Indoor Organic Photovoltaic using Impedance Spectroscopy Technique
Impedance spectroscopy (IS) has been widely applied to study organic photovoltaic (OPV) device performance in the past few decades. IS allows the characterization in a broad range of time scales to extract information about internal process occurred within OPV. However, most of the characterization were performed under standard AM 1.5G illumination–known as outdoor performance. Recently, the potential application OPV under indoor energy harvesting have attracted great interest. In this work, IS analysis was used to study the reason of power conversion efficiency (PCE) enhancement in indoor performance (LED 2700 K, 250 – 2000 lux) of inverted OPV based on bulk heterojunction PTB7-Th:PC70BM with the device structure of ITO/TiOx/PTB7-Th:PC70BM/V2O5/Ag in comparison with the outdoor performance counterparts.
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