Nanomeghyas

Nanomeghyas

Enhancing photovoltaic performance of the perovskite solar cells by using ZIF-8 MOF nanocrystals as interface layer between perovskite and electron transport material

Document Type : Original Article

Authors
hojat amrollahi biyoki
ahmad moshaei
mahmood borhani zarandi
Abstract
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
2
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
2
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
2
/CH
3
NH
3
PbI
3
/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.
Keywords
Metal-organic frameworks
Perovskite solar cells
Surface modification
ZIF-8
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  • Receive Date 16 January 2021