High Performance Ternary Blend Organic Photovoltaic Cells for Indoor Applications
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Artificial indoor light harvesting photovoltaic cells have attracted large attention as an off-grid power source with the advance of the Internet of Things (IoTs). Among various types of photovoltaics, organic photovoltaics are notable candidate for IoT applications due to their cost-efficient and environmental-friendly structure, absorption light tunability, and especially, high photon to charge conversion efficiency at low-intensity light environment. As a result of intensive studies, the power conversion efficiency (PCE) of organic photovoltaic cells have improved considerably (PCE > 30%). To achieve high performance indoor organic photovoltaics, controlling trap-assisted recombination and leakage current is highly important due to low current density generated by low incident light intensity. Herein, we propose ternary blend based organic photovoltaic cells for high performance indoor application. We testified various combination of third component (PCBM, Y7, Y6- derivative, etc.) based on PM6:Y6 blend and compared their optoelectrical performance in indoor conditions.