Journal
MATERIALS & DESIGN
Volume 209, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2021.109972
Keywords
Perovskite solar cells; Single-atom doped graphene; Carbon electrode; Hole extraction; Charge transport
Categories
Funding
- National Natural Science Foundation of China [51971174, 51822405, 51702263]
- Natural Science Basic Research Plan in Shaanxi Province of China [2020JM-121]
- Department of Science & Technology of Shaanxi Province [2020GXLH-Z-024]
- NPU [2020GXLH-Z-024]
- Key R&D Program of Shaan Xi Province [2018ZDCXL-GY-09-04]
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A novel composite electrode composed of single atom Ni doped graphene (Ni-NG) was proposed for improving hole extraction efficiency in PSCs. The optimized PSCs with Ni-NG achieved a higher PCE, showing potential for efficient planar carbon-based PSCs. This work provides new insights into carbon electrode structure design for PSCs.
In order to improve the inherently inefficient hole extraction from perovskite to carbon electrode in planar carbon-based perovskite solar cells (PSCs), herein, a novel composite electrode composed of single atom Ni doped graphene (Ni-NG) for PSCs is proposed for the first time. Ni-NG with low work function provides a great driving force to improve the hole extraction at the interface. Meanwhile, Ni-NG with abundant single-atom Ni active sites and large specific surface area can accelerate charge transport and strengthen interface contact. Optimized PSCs with composite electrode based on Ni-NG achieved a champion power conversion efficiency (PCE) of 12.39%, higher than PSCs with pristine carbon electrode and composite electrode based on NG. Our work exploits the application of single-atom Ni doped graphene as carbon electrode and provides new insights into the structure design of carbon electrode to obtain efficient planar carbon-based PSCs. (c) 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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