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Perovskite Solar Cells Yielding Reproducible Photovoltage of 1.20 V

Perovskite Solar Cells Yielding Reproducible Photovoltage of 1.20 V

Essa A Alharbi, M Ibrahim Dar, Neha Arora, Mohammad Hayal Alotaibi, Yahya A Alzhrani, Pankaj Yadav, Wolfgang Tress, Ahmed Alyamani, Abdulrahman Albadri, Shaik M Zakeeruddin, Michael Grätzel

Research (Wash D C). 2019 Mar 18;2019:8474698.

PMID: 31549091

Abstract:

High photovoltages and power conversion efficiencies of perovskite solar cells (PSCs) can be realized by controlling the undesired nonradiative charge carrier recombination. Here, we introduce a judicious amount of guanidinium iodide into mixed-cation and mixed-halide perovskite films to suppress the parasitic charge carrier recombination, which enabled the fabrication of >20% efficient and operationally stable PSCs yielding reproducible photovoltage as high as 1.20 V. By introducing guanidinium iodide into the perovskite precursor solution, the bandgap of the resulting absorber material changed minimally; however, the nonradiative recombination diminished considerably as revealed by time-resolved photoluminescence and electroluminescence studies. Furthermore, using capacitance-frequency measurements, we were able to correlate the hysteresis features exhibited by the PSCs with interfacial charge accumulation. This study opens up a path to realize new record efficiencies for PSCs based on guanidinium iodide doped perovskite films.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP19227704	Guanidinium iodide		19227-70-4	Price

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