Development of materials and devices for high performance perovskite-organic tandem solar cells

Photovoltaic technology utilizing organic or perovskite materials has demonstrated immense potential. In particular, the versatility of molecular design and bandgap tunability has driven tremendous advances in organic solar cells (OSCs). Given that organic and perovskite materials share compatible processing technologies and device architectures, they serve as attractive partners for multijunction configurations. Recently, significant research has focused on boosting the efficiency of OSCs by synergistically integrating organic and perovskite materials with complementary bandgaps into a tandem structure. However, a critical bottleneck in this field remains the scalability of high-performance, small-area devices into large-area modules. Herein, we report the development of large-area organic PV modules fabricated via a printing technique, alongside further performance enhancements achieved by pairing them with a wide-bandgap perovskite in a tandem architecture. The large-area organic PV module exhibits an efficiency close to 17%; remarkably, the corresponding tandem module achieves an efficiency approaching 20% over a 16 cm² active area. Finally, we elucidate the pivotal role of organic materials in realizing high-performance organic and perovskite-organic tandem solar cells and demonstrate their viability in large-area module applications.