Document Type
Article
Source of Publication
Nanomaterials
Publication Date
1-6-2023
Abstract
Simplifying device layout, particularly avoiding the complex fabrication steps and multiple high-temperature treatment requirements for electron-selective layers (ESLs) have made ESL-free perovskite solar cells (PSCs) attractive. However, the poor perovskite/substrate interface and inadequate quality of solution-processed perovskite thin films induce inefficient interfacial-charge extraction, limiting the power conversion efficiency (PCEs) of ESL-free PSCs. A highly compact and homogenous perovskite thin film with large grains was formed here by inserting an interfacial monolayer of diethanolamine (DEA) molecules between the perovskite and ITO substrate. In addition, the DEA created a favorable dipole layer at the interface of perovskite and ITO substrate by molecular adsorption, which suppressed charge recombination. Comparatively, PSCs based on DEA-treated ITO substrates delivered PCEs of up to 20.77%, one of the highest among ESL-free PSCs. Additionally, this technique successfully elongates the lifespan of ESL-free PSCs as 80% of the initial PCE was maintained after 550 h under AM 1.5 G irradiation at ambient temperature.
DOI Link
ISSN
Publisher
MDPI AG
Volume
13
Issue
2
First Page
250
Last Page
250
Disciplines
Engineering
Keywords
ESL-free perovskite solar cell, diethanolamine, interface modification, high performance
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Sajid, Sajid; Alzahmi, Salem; Wei, Dong; Salem, Imen Ben; Park, Jongee; and Obaidat, Ihab M, "Diethanolamine Modified Perovskite-Substrate Interface for Realizing Efficient ESL-Free PSCs" (2023). All Works. 5637.
https://zuscholars.zu.ac.ae/works/5637
Indexed in Scopus
no
Open Access
yes
Open Access Type
Gold: This publication is openly available in an open access journal/series