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Preparation and characterization of planar heterojunction perovskite solar cells based on c-TiO2/CH3NH3PbI3/HTM/Ag structure

  • Original Paper: Functional coatings, thin films and membranes (including deposition techniques)
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Abstract

In this paper, A modified one-step method was used to prepare the CH3NH3PbI3 (MAPbI3) perovskite film, and the planar heterojunction perovskite solar cells (PHPSCs) were assembled by optimizing the preparation process of the TiO2 compact layer (c-layer) and perovskite film. A TiO2 c-layer as the electron transfer layers (ETLs) was controlled by the spin coating method with the different TiO2 precursor solution and the number of spin coating. The perovskite layer, as a light absorption layer, was obtained by spin coating on the TiO2 c-layer with MAPbI3 precursor solutions of different mass concentrations. The characterization results show that although the preparation process is different, the surface morphology of TiO2 c-layer and perovskite layer are not very different, but there are some fluctuations in the thickness and internal structure of their films. The planar solar cell devices with c-TiO2/MAPbI3/HTM/Ag structure showed different photoelectric conversion performance. By optimizing the preparation process, the photoelectric conversion efficiency of the assembled solar cell device can reach 12.11% based on a TiO2 c-layer obtained by two-spin coating with 0.1 M precursor solution and the perovskite layer obtained by spin coating with a mass concentration of 45% in MAPbI3 solution.

Highlights

  • Figure 1 Diagram of the perovskite film deposited on the TiO2 c-layer by a modified one-step method.

  • Figure 3a SEM images of a TiO2 c-layer of 0.1–2T indicates that the TiO2 c-layer has smooth surface morphology.

  • Figure 11c SEM images prepared with 45 wt% mass concentrations of MAPbI3 solutions on the TiO2 c-layer of two coating.

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Authors and Affiliations

  1. The School of Material Science & Chemical Engineering, Harbin University of Science and Technology, 150040, Harbin, PR China

    Jing Wu, Yuwen Wang, Chaoying Su, Hong Zhou, Huanyan Xu & Liguo Jin

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  1. Jing Wu
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  2. Yuwen Wang
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  3. Chaoying Su
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Correspondence to Liguo Jin.

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Wu, J., Wang, Y., Su, C. et al. Preparation and characterization of planar heterojunction perovskite solar cells based on c-TiO2/CH3NH3PbI3/HTM/Ag structure. J Sol-Gel Sci Technol 100, 440–450 (2021). https://doi.org/10.1007/s10971-021-05682-z

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  • DOI: https://doi.org/10.1007/s10971-021-05682-z

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