Recent Advances in Wide-Bandgap Organic-Inorganic Halide Perovskite Solar Cells and Tandem Application

Perovskite-based tandem solar cells have attracted increasing interest because of its great potential to surpass the Shockley-Queisser limit set for single-junction solar cells. In the tandem architectures, the wide-bandgap (WBG) perovskites act as the front absorber to offer higher open-circuit voltage (V-OC) for reduced thermalization losses. Taking advantage of tunable bandgap of the perovskite materials, the WBG perovskites can be easily obtained by substituting halide iodine with bromine, and substituting organic ions FA and MA with Cs. To date, the most concerned issues for the WBG perovskite solar cells (PSCs) are huge V-OC deficit and severe photo-induced phase separation. Reducing V-OC loss and improving photostability of the WBG PSCs are crucial for further efficiency breakthrough. Recently, scientists have made great efforts to overcome these key issues with tremendous progresses. In this review, we first summarize the recent progress of WBG perovskites from the aspects of compositions, additives, charge transport layers, interfaces and preparation methods. The key factors affecting efficiency and stability are then carefully discussed, which would provide decent guidance to develop highly efficient and stable WBG PSCs for tandem application.

Automated summary

Perovskite-based tandem solar cells have attracted increasing interest due to their potential to surpass the Shockley-Queisser limit for single-junction solar cells. Wide-bandgap perovskites act as front absorbers in tandem architectures, offering higher open-circuit voltage and reduced thermalization losses. The main challenges for wide-bandgap perovskite solar cells (PSCs) include large open-circuit voltage deficit and severe photo-induced phase separation. Recent research efforts have made significant progress in addressing these issues and improving the efficiency and stability of wide-bandgap PSCs for tandem applications.