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Engineered Cathode Buffer Layers for Highly Efficient Organic Solar Cells: A Review

Swati Bishnoi, Ram Datt, Sandeep Arya, Sonal Gupta, Ramashanker Gupta, Wing Chung Tsoi Orcid Logo, Shailesh N. Sharma, Shashikant P. Patole, Vinay Gupta Orcid Logo

Advanced Materials Interfaces, Volume: 9, Issue: 19, Start page: 2101693

Swansea University Authors: Ram Datt, Wing Chung Tsoi Orcid Logo

  • Accepted Manuscript under embargo until: 30th January 2023

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DOI (Published version): 10.1002/admi.202101693

Abstract

This article presents an in-depth insight into the most efficient cathode buffer layers (CBLs) in conventional and inverted organic solar cells (OSCs). The CBL can play a critical role in improving the short circuit current density (Jsc) and fill factor (FF) of the devices by minimizing the contact...

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Published in: Advanced Materials Interfaces
ISSN: 2196-7350 2196-7350
Published: Wiley 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa59430
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Abstract: This article presents an in-depth insight into the most efficient cathode buffer layers (CBLs) in conventional and inverted organic solar cells (OSCs). The CBL can play a critical role in improving the short circuit current density (Jsc) and fill factor (FF) of the devices by minimizing the contact resistance and reducing charge recombination at electrode/photoactive layer interface, resulting in the efficient extraction of charge carriers and therefore improving the power conversion efficiency (PCE). This review explores CBL with respect to its effect on the physics of a device and electronic processes at the interface of CBL/photoactive layer and its impact on the overall performance of solar cells. Besides this, we have discussed in detail the role of CBL, its chemical composition, morphology, thickness, dopants, deposition conditions, etc. and their corresponding effects on the device performance in both conventional and inverted OSCs. Finally, we have summarized a few CBLs that provided the best performance and discussed their chemical structures. This article will benefit the researchers working in the domain of solar cells by providing an understanding of the CBL layers, along with their interfacial working mechanism.
Keywords: cathode buffer layer; electron transport layer; interfacial layer; organic solar cells; power conversion efficiency
College: College of Engineering
Issue: 19
Start Page: 2101693