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Issue 4, 2019
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Co-axial electrospray: a versatile tool to fabricate hybrid electron transporting materials for high efficiency and stable perovskite photovoltaics

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Abstract

We report a cost-effective and simple co-axial electrospray technique to fabricate a hybrid electron transporting material (ETM) consisting of a nanocomposite of hierarchically structured TiO2 nanobeads (NBs) blended with ZnO nanofibers (NFs), namely ZnO NFs + TiO2 NBs, for the first time ever. Owing to its large surface area, highly porous nature and fast electron transport, the hybrid ETM is further used in methylammonium lead iodide (CH3NH3PbI3)-based perovskite solar cells (PSCs). The optimized cells utilizing the hybrid ETM exhibit a 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 the ZnO NF + TiO2 NB hybrid ETM is found to be far superior to that of only ZnO NF and hierarchically structured TiO2 NB-based ETMs. Light-induced transient measurement shows that the significantly rapid electron diffusion and longer electron lifetime of the ZnO NF + TiO2 NB hybrid ETM than of only ZnO NF and hierarchically structured TiO2 NB-based ETMs contribute to the enhanced efficiency in PSCs.

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

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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., 2019,1, 1297-1304
  • Open access: Creative Commons BY-NC license
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    Co-axial electrospray: a versatile tool to fabricate 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, 1, 1297
    DOI: 10.1039/C8NA00409A

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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      [Original citation] - Published by The Royal Society of Chemistry.

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