Issue 4, 2019

Co-axial electrospray: a versatile tool to fabricate 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 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

Supplementary files

Article information

Article type
Communication
Submitted
19 Dec. 2018
Accepted
11 Febr. 2019
First published
12 Febr. 2019
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2019,1, 1297-1304

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

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