Centimetre-scale perovskite solar cells with fill factors of more than 86 per cent

Date

2022-01-26

Authors

Peng, Jun
Kremer, Felipe
Walter, Daniel
Wu, Yiliang
Ji, Yi
Xiang, Jin
Liu, Wenzhu
Duong, The
Shen, Heping
Lu, Teng

Journal Title

Journal ISSN

Volume Title

Publisher

Springer Nature

Abstract

Owing to rapid development in their efficiency1 and stability2, perovskite solar cells are at the forefront of emerging photovoltaic technologies. State-of-the-art cells exhibit voltage losses3-8 approaching the theoretical minimum and near-unity internal quantum efficiency9-13, but conversion efficiencies are limited by the fill factor (<83%, below the Shockley-Queisser limit of approximately 90%). This limitation results from non-ideal charge transport between the perovskite absorber and the cell's electrodes5,8,13-16. Reducing the electrical series resistance of charge transport layers is therefore crucial for improving efficiency. Here we introduce a reverse-doping process to fabricate nitrogen-doped titanium oxide electron transport layers with outstanding charge transport performance. By incorporating this charge transport material into perovskite solar cells, we demonstrate 1-cm2 cells with fill factors of >86%, and an average fill factor of 85.3%. We also report a certified steady-state efficiency of 22.6% for a 1-cm2 cell (23.33% ± 0.58% from a reverse current-voltage scan).

Description

Keywords

Perovskite solar cells, Solar cells, Photovoltaics, Titanium oxy-nitride

Citation

Peng, J., Kremer, F., Walter, D. et al. Centimetre-scale perovskite solar cells with fill factors of more than 86 per cent. Nature 601, 573–578 (2022). https://doi.org/10.1038/s41586-021-04216-5

Source

Nature

Type

Journal article

Book Title

Entity type

Access Statement

Open Access

License Rights

DOI

10.1038/s41586-021-04216-5

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