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Title: Spinel Co3O4 nanomaterials for efficient and stable large area carbon-based printed perovskite solar cells
Authors: Bashir, Amna
Shukla, Sudhanshu
Lew, Jia Haur
Shukla, Shashwat
Bruno, Annalisa
Gupta, Disha
Baikie, Tom
Patidar, Rahul
Akhter, Zareen
Priyadarshi, Anish
Mathews, Nripan
Mhaisalkar, Subodh Gautam
Keywords: Engineering::Materials
Issue Date: 2017
Source: Bashir, A., Shukla, S., Lew, J. H., Shukla, S., Bruno, A., Gupta, D., . . . Mhaisalkar, S. G. (2018). Spinel Co3O4 nanomaterials for efficient and stable large area carbon-based printed perovskite solar cells. Nanoscale, 10(5), 2341-2350. doi:10.1039/c7nr08289d
Journal: Nanoscale
Abstract: Carbon based perovskite solar cells (PSCs) are fabricated through easily scalable screen printing techniques, using abundant and cheap carbon to replace the hole transport material (HTM) and the gold electrode further reduces costs, and carbon acts as a moisture repellent that helps in maintaining the stability of the underlying perovskite active layer. An inorganic interlayer of spinel cobaltite oxides (Co3O4) can greatly enhance the carbon based PSC performance by suppressing charge recombination and extracting holes efficiently. The main focus of this research work is to investigate the effectiveness of Co3O4 spinel oxide as the hole transporting interlayer for carbon based perovskite solar cells (PSCs). In these types of PSCs, the power conversion efficiency (PCE) is restricted by the charge carrier transport and recombination processes at the carbon–perovskite interface. The spinel Co3O4 nanoparticles are synthesized using the chemical precipitation method, and characterized by X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and UV-Vis spectroscopy. A screen printed thin layer of p-type inorganic spinel Co3O4 in carbon PSCs provides a better-energy level matching, superior efficiency, and stability. Compared to standard carbon PSCs (PCE of 11.25%) an improved PCE of 13.27% with long-term stability, up to 2500 hours under ambient conditions, is achieved. Finally, the fabrication of a monolithic perovskite module is demonstrated, having an active area of 70 cm2 and showing a power conversion efficiency of >11% with virtually no hysteresis. This indicates that Co3O4 is a promising interlayer for efficient and stable large area carbon PSCs.
ISSN: 2040-3364
DOI: 10.1039/c7nr08289d
Rights: © 2018 The Royal Society of Chemistry. All rights reserved. This paper was published in Nanoscale and is made available with permission of The Royal Society of Chemistry.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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