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Effect of Structure, Temperature, and Metal Work Function on Performance of Organometallic Perovskite Solar Cells

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Abstract

The impact of hole transport materials (HTMs) on the performance of methylammonium lead halide (CH3NH3PbI3)-based perovskite solar cells has been investigated using computational analysis. The main objective is to replace the HTM with the aim of enhancing the lifetime and decreasing the overall cost of the device. As the CH3NH3PbI3 absorber layer shows an absorption coefficient as high as 105/cm, all photons with incident energy larger the material bandgap are absorbed within only a 400-nm-thick layer. Also, all the electronic and optical properties of such an absorber layer are suitable for use in photovoltaic (PV) devices. Hence, the effects of the HTM thickness, operating temperature, incident light spectrum, and metal electrode work function on the charge collection were studied numerically. For a cell with Cu2O as HTM, efficiency exceeding 25% is predicted for a 350-nm-thick absorber layer. Also, a fully optimized device architecture without HTM shows the possibility of fabricating a perovskite solar cell with PV efficiency exceeding 15%. We expect considerable minimization of the energy loss in this structure due to charge transfer across the heterojunction. Moreover, the effect of temperature on perovskite solar cells and potential electrodes with different work functions has been investigated. Our results are believed to help open an experimental avenue to achieve optimum results for perovskite solar cells with various structures.

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Acknowledgements

We acknowledge financial support from the Qatar Environment and Energy Research Institute (QEERI, Energy Grand Challenge EGC3002) at Hamad Bin Khalifa University.

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Correspondence to B. Aïssa.

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Hossain, M.I., Aïssa, B. Effect of Structure, Temperature, and Metal Work Function on Performance of Organometallic Perovskite Solar Cells. J. Electron. Mater. 46, 1806–1810 (2017). https://doi.org/10.1007/s11664-016-5232-8

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  • DOI: https://doi.org/10.1007/s11664-016-5232-8

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