Laminated Monolithic Perovskite/Silicon Tandem Photovoltaics

摘要

Perovskite/silicon tandem photovoltaics have attracted enormous attention inscience and technology over recent years. In order to improve the performanceand stability of the technology, new materials and processes need to be investigated.However, the established sequential layer deposition methods severelylimit the choice of materials and accessible device architectures. In response,a novel lamination process that increases the degree of freedom in processingthe top perovskite solar cell (PSC) is proposed. The very first prototypes oflaminated monolithic perovskite/silicon tandem solar cells with stable poweroutput efficiencies of up to 20.0% are presented. Moreover, laminated singlejunctionPSCs are on par with standard sequential layer deposition processeddevices in the same architecture. The numerous advantages of the laminationprocess are highlighted, in particular the opportunities to engineer the perovskitemorphology, which leads to a reduction of non-radiative recombinationlosses and and an enhancement in open-circuit voltage (V_(oc)). Laminated PSCsexhibit improved stability by retaining their initial efficiency after 1-year agingand show good thermal stability under prolonged illumination at 80 ℃. Thislamination approach enables the research of new architectures for perovskitebasedphotovoltaics and paves a new route for processing monolithic tandemsolar cells even with a scalable lamination process.