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[en] Solar energy is conceivably the largest source of renewable energy at our disposal, but vital advances are expected to make solar cells economically viable. Biodegradable and flexible solar cells are currently under extensive investigation for environmentally-friendly electronic applications. Biomaterials based solar cell is emerging due to their sustainable, scalable, abundant, renewable, and environmentally-friendly energy production. This review highlights recent research progress in the emerging group of biomaterials and their integration for flexible solar cell devices. The more emphasis is given to the absolute recyclable solar cell technology, processing conditions and optimized processing conditions to produce a high amount of energy. This review briefly describes the recent progress in these classes of material, covering substrates and semiconductors. A prominent demand still exists for a next-generation of flexible, biodegradable and biocompatible solar cell substrate for ultimate energy generation application.
[en] The next generation technologies based on perovskite solar cells (PSCs) are targeted to develop a true low cost, low tech, widely deployable, easily manufactured and reliable photovoltaics. After the extremely fast evolution in the last few years on the laboratory-scale, PSCs power conversion efficiency (PCE) reached over 24%. However, the widespread use of PSCs requires addressing the stability and industrial scale production issues. Carbon based monolithic perovskite solar cells (mPSCs) are one of the most promising candidates for the commercialization of the PSCs. mPSCs possess a unique architectural design and pave an easy way to produce large area and cost-effective fabrication of the PSCs. In this article, recent progress in the field of mPSCs, challenges and strategies for their improvement are briefly reviewed. Also, we focus on the predominant implementations of recent techniques in the fabrication of the mPSCs to improve their performance. This review is intended to serve as a future direction guide for the scientists who are looking forward to developing more reliable, cost-effective and large area PSCs.