Perovskite nanostructured films are essential to create advanced optoelectronic and photovoltaic devices because of the additional degrees of freedom of manipulation by light reflection and structural colouration,as w...Perovskite nanostructured films are essential to create advanced optoelectronic and photovoltaic devices because of the additional degrees of freedom of manipulation by light reflection and structural colouration,as well as by light trapping and localisation,resulting in control of intensity or polarisation of luminescence.In this paper,we report structural colouration and photoluminescence anisotropy in perovskite films deposited on a substrate with laser-induced periodic surface structures(LIPSSs)on a thin TiO_(2)layer.The LIPSS TiO_(2)layer improves charge extraction from the perovskite films,confirmed by a time-resolved photoluminescence analysis.The developed method of substrate nanostructuring does not damage the perovskite films,in contrast to direct laser ablation,imprinting by a mould,mechanical scratching with a cantilever,or plasma-chemical etching.Moreover,the LIPSS formation is appropriate for upscaling owing to the high speed of LIPSS writing(2.25 cm^(2)min^(-1))and uniform surface nanostructuring.展开更多
基金the Interdisciplinary Resource Center for Nanotechnology of Saint Petersburg State University within the framework of project no.AAAAA19-119091190094supported by the Russian Science Foundation(project no.24-62-00022)Priority 2030 Federal Academic Leadership Program.
文摘Perovskite nanostructured films are essential to create advanced optoelectronic and photovoltaic devices because of the additional degrees of freedom of manipulation by light reflection and structural colouration,as well as by light trapping and localisation,resulting in control of intensity or polarisation of luminescence.In this paper,we report structural colouration and photoluminescence anisotropy in perovskite films deposited on a substrate with laser-induced periodic surface structures(LIPSSs)on a thin TiO_(2)layer.The LIPSS TiO_(2)layer improves charge extraction from the perovskite films,confirmed by a time-resolved photoluminescence analysis.The developed method of substrate nanostructuring does not damage the perovskite films,in contrast to direct laser ablation,imprinting by a mould,mechanical scratching with a cantilever,or plasma-chemical etching.Moreover,the LIPSS formation is appropriate for upscaling owing to the high speed of LIPSS writing(2.25 cm^(2)min^(-1))and uniform surface nanostructuring.
