Proceedings of Perovskite Thin Film Photovoltaics (ABXPV17)
Publication date: 18th December 2016
Solar cells are one of the most important routes to harvest renewable energy. The so-called third generation solar cell based on the solution-processed method has attracted significant interests. Polymer solar cells have reached ~10% power conversion efficiency for single-junction bulk heterojunction (BHJ) architectures. However, the efficiency is still too low to reach the point for a large-scale deployment. Recently, organolead halide perovskite-based solar cells demonstrated their high PCE as that of Si-based solar cells. It creates remarkable interests in the world. Nevertheless, poor stability and containing toxic Pb in the structure will be the key barriers for future applications.Various attempts have been under investigation to solve these problems. In this report, we will present a new route for fabrication of solar radiation absorbers by blending a photoactive conjugated polymer with an organolead halide perovskite to create a composite photoactive layer for solar light harvesting. The photoactive polymer did not only contribute to generation of charges, but also enhance stability of solar cells by providing a barrier protection to halide perovskites. Given that versatile of the conjugated semi-conductive polymers and halide perovskites in terms of their properties in light absorbing wavelength, bandgap, and stability, it enables to create various combinations as novel light harvesting materials with wide light absorbance, high conversion efficiency, and excellent stability for future solution-processed solar cells. The morphology and crystallinity of the composite perovskite films were investigated by using AFM, SEM and XRD respectfully. In addition, UV-Vis absorption and photoluminescence PL were used to check the optical properties. The power conversion efficiency of 14.4 % was achieved for the the best devices with JsC of 22.8 mA/cm2, VoC of 0.9 and FF of 70 %
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