All-Perovskite Tandem Solar Cells: Rapid Development of Thin Film Photovoltaic Technology

Organic-inorganic halide perovskite materials have attracted wide attention and research because of their adjustable bandgap, high absorption coefficient, and simple preparation methods. The power conversion efficiency (PCE) of single-junction perovskite cells has increased from 3.8% to 26% in recent years. Using bandgap complementary photovoltaic technology to pair wide-bandgap with low bandgap perovskites to build all-perovskite tandem solar cells (all-PTSCs) is one of the best strategies to break the limitation of Shockley-Queisser (SQ), which is expected to obtain a PCE higher than 30% at low cost. In this brief review, the structure and working principle of all-PTSCs is first introduced. Then the latest progress of each component of tandem devices is reviewed according to the two different tandem modes of 2-terminal (2-T) and 4-terminal (4-T). Besides, the existing problems and optimization strategies of different components are discussed. Finally, the future development of all-PTSCs is prospected.

Automated summary

Organic-inorganic halide perovskite materials have received widespread attention and research due to their adjustable bandgap, high absorption coefficient, and simple preparation methods. The power conversion efficiency (PCE) of single-junction perovskite cells has significantly increased in recent years. All-perovskite tandem solar cells (all-PTSCs) utilizing bandgap complementary photovoltaic technology are considered a promising strategy to overcome the limitation of Shockley-Queisser and achieve high PCE at low cost. This brief review provides an overview of the structure, working principle, recent progress, existing problems, optimization strategies, and future development of all-PTSCs based on both 2-terminal (2-T) and 4-terminal (4-T) tandem modes.