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Roll-to-roll slot-die coating of PTAA with PEDOT:PSS buffer layer for perovskite solar cells: coating analysis by XPS mapping
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Rodrigo Garcia Rodriguez,
Christian Griffiths,
Kathryn Lacey,
Ershad Parvazian,
David Beynon ,
Matthew Davies ,
Trystan Watson
Journal of Materials Chemistry A, Volume: 13, Issue: 20, Pages: 14957 - 14963
Swansea University Authors:
Rahul Patidar, James McGettrick , Rodrigo Garcia Rodriguez, Christian Griffiths, Kathryn Lacey, Ershad Parvazian, David Beynon , Matthew Davies , Trystan Watson
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DOI (Published version): 10.1039/d4ta06606e
Abstract
Roll-to-Roll (R2R) deposition offers a promising route for scaling up the production of perovskite solar cells (PSCs); however, the performance of R2R-fabricated devices still lags behind those produced through laboratory-scale methods. One significant factor contributing to this performance gap, pa...
| Published in: | Journal of Materials Chemistry A |
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| ISSN: | 2050-7488 2050-7496 |
| Published: |
Royal Society of Chemistry (RSC)
2025
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa69410 |
| Abstract: |
Roll-to-Roll (R2R) deposition offers a promising route for scaling up the production of perovskite solar cells (PSCs); however, the performance of R2R-fabricated devices still lags behind those produced through laboratory-scale methods. One significant factor contributing to this performance gap, particularly in P–I–N structured devices, is the use of suboptimal hole transport layers (HTLs), such as poly(3,4-ethylenedioxythiophene)–polystyrenesulfonate (PEDOT:PSS). In this study, we explore the potential of replacing PEDOT:PSS with poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), a more efficient and stable HTL. While undoped PTAA alone shows promise, its application on the rough surface of PET-ITO substrates is insufficient to fully replace PEDOT:PSS, leading to reduced device performance. However, when combined with a PEDOT:PSS buffer layer, PTAA demonstrated significant improvements, achieving a power conversion efficiency (PCE) of 15.2% compared to 12.6% with PTAA alone using R2R deposition. To better understand the coating characteristics and interactions of these materials, we conducted a detailed analysis of the surface topography of PET-ITO and the HTL layer using X-ray photoelectron spectroscopy (XPS) mapping. This study provides critical insights into the synergistic effects of PEDOT:PSS and PTAA, highlighting their combined potential for enhancing the efficiency of R2R-fabricated PSCs. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
This work was supported by the VIPERLAB project, funded by the European Union's Horizon 2020 research and innovation programme under grant agreement no. 101006715, the ATIP (Application Targeted and Integrated Photovoltaics) project under grant agreement EP/T028513/1, the EPSRC Prosperity Partnership [EP/X025217/1], and the Advanced Imaging of Materials (AIM) facility at Swansea University. |
| Issue: |
20 |
| Start Page: |
14957 |
| End Page: |
14963 |