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Synthesis of SnO2 nanofibers and nanobelts electron transporting layer for efficient perovskite solar cells

Abstract

Implementation of positive alternative electron transporting layers (ETLs) having excellent electronic properties is most promising task in order to up-scale low-cost highly efficient perovskite solar cells (PSCs) technology. The present work demonstrates the preparation of tin oxide (SnO2) nanofibers (NF) and nanobelts (NB) as an electron transporting layer (ETL) for PSCs. The smooth and uniform nanofibers and nanobelts have been prepared by using electrospinning technique followed by calcination at 6000C. The thermogravimetric analysis (TGA) analysis performed on as-spun polyvinylpyrrolidone-tin oxide (PVP-SnO2) composite suggests 600 °C as a calcination temperature is required for obtaining pure SnO2 and to ensure complete removal of PVP along with other organic solvents. The structural analysis confirmed the presence of pure tetragonal rutile phase of SnO2 nanofibers and nanobelts. The prepared nanofibers and nanobelts were further used as an ETL for PSCs. Our optimized experimental parameter yielded JSC of 22.46 mAcm-2, VOC of 1.081 V and FF of 66 % leading to >16 % power conversion efficiency (PCE) for SnO2 nanobelts using (FAPbI3)0.85(MAPbI3)0.15 perovskite absorber layer with good stability. The obtained PCE is much higher than that of SnO2 NF (12.93 %) morphology. Nevertheless, the synthesis of SnO2 NF/NB ETLs simple, low-cost and large scale method for PSCs.

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Publication details

The article was received on 24 Jan 2018, accepted on 03 Apr 2018 and first published on 03 Apr 2018


Article type: Paper
DOI: 10.1039/C8NR00695D
Citation: Nanoscale, 2018, Accepted Manuscript
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    Synthesis of SnO2 nanofibers and nanobelts electron transporting layer for efficient perovskite solar cells

    S. S. Mali, J. V. Patil, H. J. Kim and C. K. Hong, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR00695D

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