Recent advances in perovskite/Cu(In,Ga)Se2 tandem solar cells

Tandem solar cells (TSCs) are poised to revolutionize photovoltaic (PV) technology as they hold the promise of a significantly higher power conversion efficiency (PCE) compared to the current dominant single-junction solar cells. TSCs are composed of two different absorbing materials, strategically utilizing the shared incident solar spectrum to achieve a synergistic boost in PCE. The perovskite/Cu(In,Ga)Se₂ (CIGS) TSCs, as a cutting-edge and prospective solar energy conversion device, have sparked widespread research interest by synergistically combining the unique advantages of perovskite and CIGS materials. This comprehensive review presents a thorough investigation of the latest research advancements in perovskite/CIGS TSCs, with a specific focus on the intricacies of device structure design and state-of-the-art fabrication methods. Significant attention is devoted to elucidating the pivotal role of interface engineering, material composition optimization, and precise control of processing parameters in determining the PV performance of the devices. By optimizing the stacked architecture and enhancing material interfaces, the review demonstrates how substantial improvements have been achieved in terms of high-efficiency PV conversion and superior carrier transport, consequently elevating the performance and long-term device stability. Finally, the review provides a compelling outlook on the future development of perovskite/CIGS TSCs, aiming to drive further advancements and practical applications of this advanced technology.