HCl-assisted two-step method for enhancing the performance of perovskite solar cells fabricated in air
HCl-assisted two-step method for enhancing the performance of perovskite solar cells fabricated in air
- Author(s): A. De Maria ; V. La Ferrara ; G. Rametta ; L.V. Mercaldo ; A. Bruno ; F. Matteocci ; A. Di Carlo ; P.D. Veneri
- DOI: 10.1049/cp.2018.1659
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- Author(s): A. De Maria ; V. La Ferrara ; G. Rametta ; L.V. Mercaldo ; A. Bruno ; F. Matteocci ; A. Di Carlo ; P.D. Veneri Source: 20th Italian National Conference on Photonic Technologies (Fotonica 2018), 2018 page (4 pp.)
- Conference: 20th Italian National Conference on Photonic Technologies (Fotonica 2018)
- DOI: 10.1049/cp.2018.1659
- ISBN: 978-1-78561-991-5
- Location: Lecce, Italy
- Conference date: 23-25 May 2018
- Format: PDF
Today's best perovskite solar cells are realized under highly controlled ambient conditions, using N2 filled glove boxes with only trace levels of oxygen and water. The influence of the atmospheric conditions, and in particular of the relative humidity (RH), during the device fabrication is thus an issue that needs to be understood in order to realize efficient perovskite solar cells without any control of the environmental conditions. This would simplify the upscale of the devices for future mass production. Here we illustrate a method to improve the power conversion efficiency of perovskite (CH3NH3PbI3) solar cells fabricated by two-step procedure in an environment with high relative humidity, based on the addition of HCl in the PbI2/N,Ndimethylformamide precursor solution. Perovskite solar cells have been realized using various concentrations of HCl under different relative humidity values. The main result is that the addition of 0.5 vol % of HCl in the precursor solution allows a relative efficiency increase of about 70% when the devices are fabricated at very high relative humidity (RH=65%).
Inspec keywords: humidity; chlorine compounds; nitrogen compounds; iodine compounds; hydrogen compounds; lead compounds; solar cells
Subjects: Photoelectric conversion; solar cells and arrays; Solar cells and arrays
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