نوع مقاله : مقاله پژوهشی
1 گروه فیزیک، دانشکده علوم پایه، دانشگاه تربیت مدرس، تهران
2 گروه اتمی و مولکولی، دانشکده فیزیک، دانشگاه یزد، یزد
عنوان مقاله [English]
Metal-organic frameworks (MOFs) has recently attracted significant research attention in the perovskite solar cells (PVSCs) owing to its facile solution processability and exceptional microporous structure. In this study, due to superior properties of MOFs in their chemical and moisture stability, Zeolitic Imidazolate Framework (ZIF-8) nanocrystals were used as an interlayer in conjunction with the perovskite film and electron transporting layer to surface modification of the perovskite layer and improve charge transfer in the solar cell structure. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) patterns show porous structure of ZIF-8 nanocrystals on mesoporousTiO
can acts as a scaffold for crystallization of perovskite layer with lowerdefect concentration. The optical and electrical characterization show that the ZIF-8 on the mesoporous TiO
layercan acts as auxiliary light absorbing layer at the short-wavelength range, leading to improved photovoltaic performance of the perovskite solar cells. As a result, the power conversion efficiencies (PCE) of the hole transport material (HTM) free perovskite solar cells with the structure of FTO/TiO
/Au is enhanced from 5.19 to 6.11% when ZIF-8 is present. Achieving such a performance, due to deposition steps and solar cells fabrication have been done in environment conditions outside of glove box procedure, is significant. This study demonstrates the promising potential of using MOFs to fabricate efficient PVSCs.