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Oxidation states in perovskite layers formed using various deposition techniques
Organic–inorganic halide perovskites have rapidly become emerging materials for photovoltaic applications, but a major factor causing instability in perovskite solar cells could be the elemental shift due to oxygen. The present work demonstrates the oxidation states of perovskite layers formed by (i) one-step deposition, (ii) solvent-to-solvent extraction, (iii) hot casting, and (iv) mixed-cation solution processing. X-ray photoelectron spectroscopy is used to investigate the compositional changes due to oxygen, and the spectra confirm the diffusion of oxygen in the perovskite layer. Mixed-cation perovskites show the most promising results among the four deposition techniques. The best photovoltaic performance is achieved by an SnO2-based mixed-cation perovskite solar cell with a power conversion efficiency of 18.75%. A power conversion efficiency of 16.74% is obtained by a TiO2-based mixed-cation perovskite solar cell when the optimum thickness of the TiO2 blocking layer is 60–65 nm.
Oxidation states in perovskite layers formed using various deposition techniques
Organic–inorganic halide perovskites have rapidly become emerging materials for photovoltaic applications, but a major factor causing instability in perovskite solar cells could be the elemental shift due to oxygen. The present work demonstrates the oxidation states of perovskite layers formed by (i) one-step deposition, (ii) solvent-to-solvent extraction, (iii) hot casting, and (iv) mixed-cation solution processing. X-ray photoelectron spectroscopy is used to investigate the compositional changes due to oxygen, and the spectra confirm the diffusion of oxygen in the perovskite layer. Mixed-cation perovskites show the most promising results among the four deposition techniques. The best photovoltaic performance is achieved by an SnO2-based mixed-cation perovskite solar cell with a power conversion efficiency of 18.75%. A power conversion efficiency of 16.74% is obtained by a TiO2-based mixed-cation perovskite solar cell when the optimum thickness of the TiO2 blocking layer is 60–65 nm.
Oxidation states in perovskite layers formed using various deposition techniques
Shahriar, Shaimum (author) / Castaneda, Vanessa (author) / Martinez, Manuel (author) / Mishra, Aditya Kumar (author) / Akter, Tahmina (author) / Schutt, Kelly (author) / Boscoboinik, J. Anibal (author) / Hodges, Deidra (author)
2019-09-01
10 pages
Article (Journal)
Electronic Resource
English
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