Efficient and stable solution-processed planar perovskite solar cells via contact passivation

Hairen Tan, Ankit Jain, Oleksandr Voznyy, Xinzheng Lan, F. Pelayo García De Arquer, James Z. Fan, Rafael Quintero-Bermudez, Mingjian Yuan, Bo Zhang, Yicheng Zhao, Fengjia Fan, Peicheng Li, Li Na Quan, Yongbiao Zhao, Zheng Hong Lu, Zhenyu Yang, Sjoerd Hoogland, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2020 Scopus citations

Abstract

Planar perovskite solar cells (PSCs) made entirely via solution processing at low temperatures (<150°C) offer promise for simple manufacturing, compatibility with flexible substrates, and perovskite-based tandem devices. However, these PSCs require an electron-selective layer that performs well with similar processing. We report a contact-passivation strategy using chlorine-capped TiO2 colloidal nanocrystal film that mitigates interfacial recombination and improves interface binding in low-temperature planar solar cells. We fabricated solar cells with certified efficiencies of 20.1 and 19.5% for active areas of 0.049 and 1.1 square centimeters, respectively, achieved via low-temperature solution processing. Solar cells with efficiency greater than 20% retained 90% (97% after dark recovery) of their initial performance after 500 hours of continuous room-temperature operation at their maximum power point under 1-sun illumination (where 1 sun is defined as the standard illumination at AM1.5, or 1 kilowatt/square meter).

Original languageEnglish (US)
Pages (from-to)722-726
Number of pages5
JournalScience
Volume355
Issue number6326
DOIs
StatePublished - Feb 17 2017

ASJC Scopus subject areas

  • General

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