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Hybrid perovskite films deposited by thermal evaporation from a single source

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Abstract

Hybrid perovskites, such as MAPbI3, are very promising materials to fabricate highly efficient and low-cost solar cells and photodetectors. In this work, we propose a new method of deposition of hybrid perovskite thin films through thermal evaporation of MAPbI3 powder from a single source for which was evaluated the effect of evaporation parameters (distance, time, substrate temperature, chamber pressure, and crucible heating rate) on the structural, optical, and morphological properties. It was found that it is necessary to control adequately the chamber partial pressure, substrate temperature, and the crucible heating rate in order to obtain single-phase MAPbI3 perovskite films. Also, it was studied the solvent annealing treatment as a method to increase the grain size of evaporated films. Finally, a study of transient and steady-state photoconductivity allowed verifying that the evaporated MAPbI3 films present fast band to band photogeneration and bimolecular recombination, and also that the grain size growth leads to an increase of the photoconductivity intensity due to the improvement of the diffusion length.

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Fig. 1

source thermal evaporation system used to deposit MAPbI3 films. b Evaporation routine typically used to obtain single-phase MAPbI3 films

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Acknowledgements

This project was funded by Universidad Industrial de Santander Postdoctoral research supporting program VIE (grant number RC N° 001-1577) and by the Solar Cells Laboratory of Universidad Nacional de Colombia-Bogotá.

Funding

This study was funded by Universidad Industrial de Santander Postdoctoral research supporting program VIE (grant number RC N° 001- 1577).

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Authors and Affiliations

  1. Escuela de Ingenierías Eléctrica, Electrónica y Telecomunicaciones, Universidad Industrial de Santander, Bucaramanga, Colombia

    Camilo Otalora, Mónica A. Botero, Maria. A. Mantilla & Johann. F. Petit

  2. Escuela de Física, Universidad Industrial de Santander, Bucaramanga, Colombia

    Rogelio Ospina

  3. Departamento de Física, Universidad Nacional de Colombia, Bogotá, Colombia

    Gerardo Gordillo

Authors
  1. Camilo Otalora
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  2. Mónica A. Botero
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  3. Maria. A. Mantilla
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  4. Johann. F. Petit
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  5. Rogelio Ospina
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  6. Gerardo Gordillo
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Contributions

C. Otalora, M. Botero, and J.F. Petit contributed to conceptualization; C. Otalora and M. Botero were involved in methodology; J.F. Petit validated the study; C. Otalora and G. Gordillo performed formal Analysis; C. Otalora, M. Botero, M. Mantilla, R.Ospina, J.F. Petit, and G. Gordillo investigated the study; R. Ospina, M. Botero, and G. Gordillo collected resources; C. Otalora was involved in writing––original draft; M. Botero, M. Mantilla., R. Ospina, J.F. Petit, and G. Gordillo were involved in writing––review & editing; J.F. Petit supervised the study; M. Botero contributed to project administration; M. Botero and G. Gordillo were involved in funding acquisition.

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Correspondence to Camilo Otalora.

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Otalora, C., Botero, M.A., Mantilla, M.A. et al. Hybrid perovskite films deposited by thermal evaporation from a single source. J Mater Sci: Mater Electron 32, 12151–12163 (2021). https://doi.org/10.1007/s10854-021-05844-3

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  • DOI: https://doi.org/10.1007/s10854-021-05844-3

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