Strategically grown Cs2AgBiBr6 double perovskite material for lead-free all inorganic perovskite solar cells
Abhishek Raj a b, Manish Kumar c, Avneesh Anshul a b
a CSIR-National Environmental Engineering Research Institute (NEERI), Nagpur-440020, India
b Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
c Experimental Research Laboratory, Department of Physics, ARSD College, University of Delhi, New Delhi-110021, India
Oral, Abhishek Raj, presentation 152
Publication date: 6th February 2024

The demand for eco-friendly and sustainable energy sources has prompted intensive research in the field of photovoltaics, leading to investigate the lead-free materials as alternatives to traditional perovskite solar cells (PSCs). Recently, Cs2AgBiBr6 based double perovskite materials have been explored in photovoltaic devices due to their superior optoelectronic properties and inherent non-toxicity. Here, high quality Cs2AgBiBr6 is synthesized with controlled cooling temperature to improve the crystal growth. Further, the spinel NiCO2O4 nanostructure was investigated to apply as efficient hole transport layer in PSCs. Various techniques were employed to characterize the synthesized materials, including UV–vis spectroscopy (UV), field emission scanning electron microscopy (FESEM), X-ray absorption spectroscopy (XAS), Fourier transform infrared spectroscopy, and transmission electron microscopy (TEM). The crystal structure, band gap, elemental mapping, surface morphology, and coordination of Ni in the Co3O4 matrix were examined using X-ray diffraction (XRD), UV, FESEM, and XAS, respectively. Finally, lead-free inorganic PSCs is fabricated with spinel NiCo2O4 HTL and exhibited enhanced solar cells parameters.

The author, Abhishek Raj,  would like to thank CSIR-HRDG, CSIR, New Delhi, and its constituent laboratory CSIR-NEERI, Nagpur, India, for research support.

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