Towards a long-term stable MAPbBr3 single crystal-based photoconductor with a high on/off ratio and detectivity

Vishnu Anilkumar; Apurba Mahapatra; Joanna Kruszyńska; Manoranjan Mandal; Seckin Akin; Pankaj Yadav; Daniel Prochowicz

doi:10.1039/d4cc06152g

Towards a long-term stable MAPbBr₃ single crystal-based photoconductor with a high on/off ratio and detectivity

Chem Commun (Camb). 2025 Jan 10. doi: 10.1039/d4cc06152g. Online ahead of print.

Authors

Vishnu Anilkumar¹, Apurba Mahapatra¹, Joanna Kruszyńska¹, Manoranjan Mandal², Seckin Akin³, Pankaj Yadav⁴, Daniel Prochowicz¹

Affiliations

¹ Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland. dprochowicz@ichf.edu.pl.
² Department of Physics, School of Science, GITAM University, Bengaluru, 561203, India.
³ Department of Metallurgical and Materials Engineering, Necmettin Erbakan University, Konya, 42090, Turkey.
⁴ Department of Solar Energy, School of Energy Technology, Pandit Deendayal Energy University, Gandhinagar-382 007, Gujarat, India.

PMID: 39789988
DOI: 10.1039/d4cc06152g

Abstract

Photodetectors based on lead halide perovskites often show excellent performance but poor stability. Herein, we demonstrate a photodetector based on MAPbBr₃ single crystals passivated with an ultrathin layer of PbSO₄, which shows superior detectivity and on/off ratios compared to the control device due to the combined effect of lower surface traps, reduced recombination and low dark current. In addition, the device retained ∼56% of its initial D* with an impressive on/off ratio of ∼801 after one year compared to ∼22% of D* and an on/off ratio of ∼6 of the control device.