Perovskite/organic tandem solar cells : a review

Abstract

The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has rapidly increased and exceeded 25% based on strategies such as interface modification, doping engineering, and optimization of preparation methods. further improvement seems to have entered a bottleneck period due to Shockley-Quiesser (S-Q) limit of single-junction devices. Tandem cell designed to achieve efficient matching of a wider range of the solar spectrum is considered a successful method to solve this difficulty. In tandem architecture, the PSC is a perfect top-cell candidate owing to its large absorption coefficient, adjustable band gap, and feasible low-temperature solution processibility. The perovskite-based tandem solar cells (TSCs) such as perovskite-silicon, perovskite-perovskite, and perovskite-organic devices have stimulated enormous research interest and got significant progress in the past few years. Among them, the abundant perovskite and organic semiconductor materials with tunable components, adjustable bandgap, and various physical and chemical properties make the perovskite/organic TSCs (PO-TSCs) more competitive. In this work, a general introduction and review of recent advances in perovskite/organic tandem features are provided. In addition, a perspective and some suggestions about future developments in this field are also discussed.