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Co-axial electrospray: A versatile tool to fabricate the hybrid electron transporting materials for high efficiency and stable perovskite photovoltaics

Abstract

We report a cost-effective and simple co-axial electrospray technique to fabricate the hybrid electron transporting material (ETM) consisting of nanocomposite of hierarchical structured TiO2 nanobeads (NB,s) blended with ZnO nanofibers (NF,s) namely (ZnO NF,s + TiO2 NB,s) for the first time ever. Owing to their large surface area, highly porous nature and fast electron transport, the hybrid ETM is further used in methylamine lead iodide (CH3NH3PbI3)-based perovskite solar cells (PSCs). The optimized cells utilizing the hybrid ETM demonstrate the maximum power conversion efficiency (PCEmax) of 20.27%, the highest efficiency reported thus far for hybrid ETMs. Moreover, negligible hysteresis and highly reproducible values of PCE are observed for such cells. The PCE of devices based on ZnO NF,s + TiO2 NB,s hybrid ETM is found to be far superior to only ZnO NF,s and hierarchical structured TiO2 NB,s-based ETMs. Light-induced transient measurement shows significantly rapid electron diffusion coefficient and longer electron lifetime of ZnO NF,s + TiO2 NB,s hybrid ETM than those in only ZnO NF,s and hierarchical structured TiO2 NB,s-based ETMs contribute to the enhanced efficiency in PSCs.

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Publication details

The article was received on 19 Dec 2018, accepted on 11 Feb 2019 and first published on 12 Feb 2019


Article type: Communication
DOI: 10.1039/C8NA00409A
Citation: Nanoscale Adv., 2019, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
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    Co-axial electrospray: A versatile tool to fabricate the hybrid electron transporting materials for high efficiency and stable perovskite photovoltaics

    M. Hameed, K. Mahmood, M. Imran, F. Nawaz and M. T. Mehran, Nanoscale Adv., 2019, Accepted Manuscript , DOI: 10.1039/C8NA00409A

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