Abstract
Development of ternary metal oxide (TMO) based electron transporting layer (ETL) for perovskite solar cell open a new approaches toward efficient a unique strategy for solid state dye-sensitized solar cells (ssDSSCs). In the present investigation, highly porous zinc tin oxide (Zn2SnO4) scaffold nanofibers has been synthesized by electrospinning technique and successfully used for methyl ammonium lead halide (CH3NH3PbI3) perovskite sensitized solid state solar cells. The fabricated optimized perovskite solar cell devices exhibited 7.38% power conversion efficiency (PCE) with open circuit voltage (VOC) 0.986 V, current density (JSC) = 12.68 mAcm-2 and fill factor (FF) 0.59 under AM 1.5 G sunlight (100 mWcm−2) which is higher than Zn2SnO4 nanoparticle (η = 2.52%) based perovskite solar cells. This improvement is achieved due to high porosity of Zn2SnO4 nanofibers and high crystallinity of the nanofibers synthesized at 700 °C. These results are remarkably higher than reported perovskite solar cells based on such type of ternary metal oxide ETLs.
Highlights
Perovskite solar cell (PSC) based on different organo metal halides and mixed halides have attracted attention as promising efficient solid state solar cells due to their low fabrication cost, process ability, fine band gap tuning, and variety of mixed halides[1,2,3,4]
There is no substantial reports are available based on ternary metal oxide (TMO) as electron transporting layer (ETL) for perovskite solar cell (PSC)
The surface morphology of Zn2SnO4/PVP nanofibers were characterized by field emission scanning electron microscopy (FESEM)
Summary
Perovskite solar cell (PSC) based on different organo metal halides and mixed halides have attracted attention as promising efficient solid state solar cells due to their low fabrication cost, process ability, fine band gap tuning, and variety of mixed halides[1,2,3,4]. Blocking TiO2 (Bl-TiO2) layer, mesoporous TiO2 (mp-TiO2), organometallic halide perovskite sensitizers (CH3NH3PbI3 and CH3NH3PbI3-xClx), hole transporting material (HTM) (spiro-MeOTAD) and counter electrode (Au) are the key components of mesoscopic heterojunction structure perovskite solar cells, while mp-TiO2 is absent in planar heterojunction type perovskite solar cells[5,6]. This compact Bl-TiO2 layer can be deposited by spin or thermal oxidation method. There is no substantial reports are available based on ternary metal oxide (TMO) as electron transporting layer (ETL) for PSC. Efforts have been made to increase the scaffold architecture and uniform deposition of perovskite and HTM layer
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