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    • Keywords


      Perovskite layer; MAI; PbI$_2$; solar cell; optimization.

    • Abstract


      Here, the effect of perovskites layer quality on the performance of compact-TiO$_2$/mesoporous-TiO$_2$/CH$_3$NH$_3$PbI$_3$/carbon solar cells was investigated. Different perovskite layers were prepared by varying concentrationsof PbI$_2$ and CH$_3$NH$_3$I, while reaction temperature and dipping time were fixed. The range of concentrations for PbI$_2$ and methylammonium iodide (MAI) were 1–1.4 M and 6–10 mg ml$^{−1}$, respectively. Fabricated perovskite layers were first coated by carbon electrodes (5-layer) and then, the champion one was coated by Spiro-OMeTAD (as a hole transport material) andAu-evaporated layer as a cathode (6-layer). Fabricated films were fully characterized by field emission scanning electron microscopy, X-ray diffraction analysis, UV–Vis spectroscopy and photoluminescence spectrum. Photovoltaic properties were measured under AM 1.5. Output currents of 5-layer cells were in the range of 228–476 $\mu$A, of which the highest one was obtained by using 1.2M PbI$_2$ and 8 mg ml$^{−1}$ MAI. Ultimately, the maximum power conversion efficiency of 9.1% was obtained with 6-layer cell.

    • Author Affiliations



      1. Materials Engineering Department, Imam Khomeini International University, Qazvin 3414896818, Iran
      2. Niroo Research Institute (NRI), Non-Metallic Materials Research Group, Tehran 1468613113, Iran
    • Dates

  • Bulletin of Materials Science | News

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