Ti1–graphene single-atom material for improved energy level alignment in perovskite solar cells

Chunyang Zhang, Suxia Liang, Wei Liu, Felix T. Eickemeyer, Xiangbin Cai, Ke Zhou, Jiming Bian, Hongwei Zhu, Chao Zhu (), Ning Wang, Zaiwei Wang, Jiangwei Zhang, Yudi Wang, Jinwen Hu, Hongru Ma, Cuncun Xin, Shaik Mohammed Zakeeruddin, Michael Grätzel () and Yantao Shi ()
Additional contact information
Chunyang Zhang: Dalian University of Technology
Suxia Liang: Chinese Academy of Sciences
Wei Liu: Dalian University of Technology
Felix T. Eickemeyer: École Polytechnique Fédérale de Lausanne
Xiangbin Cai: Hong Kong University of Science and Technology
Ke Zhou: Xiamen University
Jiming Bian: Dalian University of Technology
Hongwei Zhu: École Polytechnique Fédérale de Lausanne
Chao Zhu: Southeast University
Ning Wang: Hong Kong University of Science and Technology
Zaiwei Wang: École Polytechnique Fédérale de Lausanne
Jiangwei Zhang: Chinese Academy of Sciences
Yudi Wang: Dalian University of Technology
Jinwen Hu: Dalian University of Technology
Hongru Ma: Dalian University of Technology
Cuncun Xin: Dalian University of Technology
Shaik Mohammed Zakeeruddin: École Polytechnique Fédérale de Lausanne
Michael Grätzel: École Polytechnique Fédérale de Lausanne
Yantao Shi: Dalian University of Technology

Nature Energy, 2021, vol. 6, issue 12, 1154-1163

Abstract: Abstract Carbon-based perovskite solar cells (C-PSCs) are widely accepted as stable, cost-effective photovoltaics. However, C-PSCs have been suffering from relatively low power conversion efficiencies (PCEs) due to severe electrode-related energy loss. Herein, we report the application of a single-atom material (SAM) as the back electrode in C-PSCs. Our Ti1–rGO consists of single titanium (Ti) adatoms anchored on reduced graphene oxide (rGO) in a well-defined Ti1O4-OH configuration capable of tuning the electronic properties of rGO. The downshift of the Fermi level notably minimizes the series resistance of the carbon-based electrode. By combining with an advanced modular cell architecture, a steady-state PCE of up to 20.6% for C-PSCs is finally achieved. Furthermore, the devices without encapsulation retain 98% and 95% of their initial values for 1,300 h under 1 sun of illumination at 25°C and 60 °C, respectively.

Date: 2021
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41560-021-00944-0 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natene:v:6:y:2021:i:12:d:10.1038_s41560-021-00944-0

Ordering information: This journal article can be ordered from
https://www.nature.com/nenergy/

DOI: 10.1038/s41560-021-00944-0

Access Statistics for this article

Nature Energy is currently edited by Fouad Khan

More articles in Nature Energy from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().