Perovskite solar cell

About: Perovskite solar cell is a research topic. Over the lifetime, 4701 publications have been published within this topic receiving 216807 citations. The topic is also known as: PSC.

Inkjet-Printed Mesoporous TiO2 and Perovskite Layers for High Efficiency Perovskite Solar Cells

Abstract: Perovskite solar cells with mesoporous TiO2 electron transport layers have previously reached >22% efficiency at the laboratory scale (<1 cm), however, these layers are fabricated using spin-coating, which is not conducive to large-scale or high throughput fabrication. This report describes the inkjet printing of open-pore mesoporous TiO2 thin films, perovskite thin films, and the fabrication of highly efficient perovskite solar cells using these films. Ink formulation and characterization studies, inkjet deposition optimization trials, film characterization, and comparison to spin-coated layers are described. The printed TiO2 films exhibited an open-pore morphology and homogeneous surface coverage in films ranging from 1 mm to >10 cm. Perovskite solar cells with printed and pristine (un-doped) inkjet-printed TiO2 layers yielded efficiencies of 18.29%, which were found to outperform cells made with spin-coated and pristine TiO2 layers (16.91%). When a quadruple-cation perovskite absorber containing Cs, formamidinium, methylammonium, and guanidinium was deposited by inkjet-printing onto the inkjetprinted TiO2 layer, nearly 12% average efficiency was reached, with the champion cell reaching 14.11%. This absorber exhibited higher efficiency and stability than did inkjet-printed MAPbI3 films deposited on the inkjet-printed TiO2 film.

Crystallization Kinetics Modulation of FASnI3 Films with Pre-nucleation Clusters for Efficient Lead-Free Perovskite Solar Cells.

Abstract: Tin halide perovskites are rising as promising materials for lead-free perovskite solar cells (PSCs). However, the crystallization rate of tin halide perovskites is much faster than the lead-based analogs, leading to more rampant trap states and lower efficiency. Here, we disclose a key finding to modulate the crystallization kinetics of FASnI3 through a non-classical nucleation mechanism based on pre-nucleation clusters (PNCs). By introducing piperazine dihydriodide to tune the colloidal chemistry of the FASnI3 perovskite precursor solution, stable clusters could be readily formed in the solution before nucleation. These pre-nucleation clusters act as intermediate phase and thus can reduce the energy barrier for the perovskite nucleation, resulting in a high-quality perovskite film with lower defect density. This PNCs-based method has led to a conspicuous photovoltaic performance improvement for FASnI3 -based PSCs, delivering an impressive efficiency of 11.39 % plus improved stability.