# High efficiency planar-type perovskite solar cells with negligible hysteresis using EDTA-complexed SnO2

Article · Dong Fang Yang, Ruixia Yang, Kai Wang, Congcong Wu, Xuejie Zhu, Jiangshan Feng, Xiaodong Ren, Guojia Fang, Shashank Priya, Shengzhong Frank Liu

- Archive id: doi:10.1038/s41467-018-05760-x
- Published: 2018-08-07
- Venue: Nature Communications
- DOI: https://doi.org/10.1038/s41467-018-05760-x
- PMID: 30104663
- Citations: 1,401
- Source URL: https://doi.org/10.1038/s41467-018-05760-x
- PDF: https://www.nature.com/articles/s41467-018-05760-x.pdf
- Provenance: openalex

## Abstract

Abstract Even though the mesoporous-type perovskite solar cell (PSC) is known for high efficiency, its planar-type counterpart exhibits lower efficiency and hysteretic response. Herein, we report success in suppressing hysteresis and record efficiency for planar-type devices using EDTA-complexed tin oxide (SnO2) electron-transport layer. The Fermi level of EDTA-complexed SnO2 is better matched with the conduction band of perovskite, leading to high open-circuit voltage. Its electron mobility is about three times larger than that of the SnO2. The record power conversion efficiency of planar-type PSCs with EDTA-complexed SnO2 increases to 21.60% (certified at 21.52% by Newport) with negligible hysteresis. Meanwhile, the low-temperature processed EDTA-complexed SnO2 enables 18.28% efficiency for a flexible device. Moreover, the unsealed PSCs with EDTA-complexed SnO2 degrade only by 8% exposed in an ambient atmosphere after 2880 h, and only by 14% after 120 h under irradiation at 100 mW cm−2.

_Abstract reproduced under CC-BY (publisher license, via OpenAlex)._

Topics: [Perovskite & Tandem Photovoltaics](https://space-kitty.com/topics/advanced-photovoltaics)

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