Half-metallic ferromagnetism in molybdenum doped methylammonium lead halides (MAPbX3, X = Cl, Br, I) system: First-principles study

Moshat, Sudipta; Luitel, Homnath; Sanyal, Dirtha

doi:10.1016/j.jmmm.2020.167463

Cited by 12 publications

(1 citation statement)

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“…Earlier, it was observed that defects play a crucial role to induce ferromagnetism in dilute magnetic semiconductor (DMS) materials [25][26][27][28]. Recently some theoretical reports suggest that vacancy in MAPbI 3 or doping of transition metal ions in MAPbX 3 (X = I, Br, Cl) can show ferromagnetism along with semiconducting behavior [29,30]. RTFM in MAPbI 3 with point defect has been observed experimentally [31].…”

Section: Introductionmentioning

confidence: 99%

Positron annihilation studies of methylammonium lead bromide perovskite

Moshat¹,

Ray²,

Sil³

et al. 2023

Phys. Scr.

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Methylammonium lead halide-based perovskite has shown excellent optoelectronic properties. But their performances and stability are critically affected by the ionic defects present in the crystal lattice. In this article, we have investigated the presence of ionic vacancy mediated defects formation in ball mill ground methylammonium lead bromide (MAPbBr3) which has applications in tandem solar cell, light emitting diodes and laser devices. The evaluation of those point defects with temperature was analysed by employing the positron annihilation spectroscopic (PAS) studies. The phase transition from tetragonal to cubic phases around 260 K was exactly correlated with the temperature-dependent ‘S parameter’ determination from PAS analysis and with dc conductivity measurement. From coincidence Doppler broadening (CDB) spectroscopy significant proportion of defects arising from lead vacancy was observed whose magnitude reduces from the low-temperature tetragonal phase to higher temperature cubic phases.

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