Recent Developments of Charge Transporting Layers for High-Performance Monolithic Perovskite/Silicon Tandem Solar Cells

The monolithic perovskite/silicon tandem solar cells (PSTSCs) with high performance and low costs bring a new dawn to the photovoltaic industry. The unprecedented rapid growth of the power conversion efficiency for perovskite/silicon tandem devices has been accompanied by a continuous refinement of suitable materials for charge-selective contacts. Herein, we reviewed the recent studies about the monolithic PSTSCs, emphasizing on the current developments of charge carrier transporting layers over the last years. The potential and merits of new charge transporting materials have been summarized, followed by a short discussion on each part. Self-assembled monolayers present the most evocative prospect by measuring performance experimentally. Based on this kind of materials, the efficiency of tandem solar cells has risen to above 30% with texture surface and other strategies. Then, we focus on the further enhancements to propose the suggestion about further optimization on the basis of most promising charge transporting layers. A great scope of research brings many innovative experimental results about outdoor performance, presenting both opportunities and challenges to future researches.