Stabilizing halide perovskite surfaces for solar cell operation with wide-bandgap lead oxysalts

Author:

Yang Shuang12ORCID,Chen Shangshang1ORCID,Mosconi Edoardo3,Fang Yanjun12,Xiao Xun1ORCID,Wang Congcong4ORCID,Zhou Yu1,Yu Zhenhua1ORCID,Zhao Jingjing12ORCID,Gao Yongli4,De Angelis Filippo356,Huang Jinsong12ORCID

Affiliation:

1. Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.

2. Department of Mechanical and Materials Engineering, University of Nebraska–Lincoln, Lincoln, NE 68588, USA.

3. Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO), CNR–Istituto di Scienze e Tecnologie Molecolari (ISTM), Perugia, Italy.

4. Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA.

5. Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy.

6. D3-Computation, Istituto Italiano di Tecnologia, Genova, Italy.

Abstract

Stability through oxysalts The stability of organic-inorganic perovskite solar cells is limited by degradation from oxygen and water. Yang et al. show that in situ reaction of perovskites with sulfate or phosphate ions can create thin, strongly bonded lead oxysalt layers that protect defect sites. This layer also boosts charge carrier lifetimes that lead to a power conversion efficiency of more than 20%. Encapsulated devices maintained about 97% of this efficiency with simulated solar irradiation for nearly 2 months at a realistic operation temperature of 65°C. Science , this issue p. 473

Funder

National Science Foundation

Office of Naval Research

Air Force Office of Scientific Research

H2020 European Research Council - Espresso Project

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference33 articles.

1. National Renewable Energy Laboratory Best research-cell efficiencies chart (2019); www.nrel.gov/pv/assets/pdfs/best-research-cell-efficiencies.20190703.pdf.

2. The light and shade of perovskite solar cells

3. Functionalization of perovskite thin films with moisture-tolerant molecules

4. Stability of Metal Halide Perovskite Solar Cells

5. Light-activated photocurrent degradation and self-healing in perovskite solar cells

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