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Tailoring Perovskite Adjacent Interfaces by Conjugated Polyelectrolyte for Stable and Efficient Solar Cells

Li, Bowei, Xiang, Yuren, Jayawardena, Imalka, Luo, Deying, Watts, John, Hinder, Steven, Li, Hui, Ferguson, Victoria, Luo, Haitian, Zhu, Rui , Silva, Ravi and Zhang, Wei (2020) Tailoring Perovskite Adjacent Interfaces by Conjugated Polyelectrolyte for Stable and Efficient Solar Cells Solar RRL.

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Abstract

Interface engineering is an effective means to enhance the performance of thin‐film devices, such as perovskite solar cells (PSCs). Herein, a conjugated polyelectrolyte, poly[(9,9‐bis(3′‐((N,N‐dimethyl)‐N‐ethyl‐ammonium)‐propyl)‐2,7‐fluorene)‐alt‐2,7‐(9,9‐dioctylfluorene)]di‐iodide (PFN‐I), is used at the interfaces between the hole transport layer (HTL)/perovskite and perovskite/electron transport layer simultaneously, to enhance the device power conversion efficiency (PCE) and stability. The fabricated PSCs with an inverted planar heterojunction structure show improved open‐circuit voltage (Voc), short‐circuit current density (Jsc), and fill factor, resulting in PCEs up to 20.56%. The devices maintain over 80% of their initial PCEs after 800 h of exposure to a relative humidity 35–55% at room temperature. All of these improvements are attributed to the functional PFN‐I layers as they provide favorable interface contact and defect reduction.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Li, Bowei
Xiang, Yureny.xiang@surrey.ac.uk
Jayawardena, Imalkai.jayawardena@surrey.ac.uk
Luo, Deying
Watts, JohnJ.Watts@surrey.ac.uk
Hinder, StevenS.Hinder@surrey.ac.uk
Li, Huihl0024@surrey.ac.uk
Ferguson, Victoriav.p.ferguson@surrey.ac.uk
Luo, Haitian
Zhu, Rui
Silva, RaviS.Silva@surrey.ac.uk
Zhang, Weiwz0003@surrey.ac.uk
Date : 25 February 2020
DOI : 10.1002/solr.202000060
Copyright Disclaimer : © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Depositing User : James Marshall
Date Deposited : 28 Feb 2020 13:42
Last Modified : 28 Feb 2020 13:42
URI: http://epubs.surrey.ac.uk/id/eprint/853848

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