Understanding the dynamics of charge trapping and detrapping is essential for improving the optoelectronic performance of hybrid perovskite materials. In this study, we investigate temperature-dependent luminescence and electrical transport in single crystals of methylammonium lead bromide (MAPbBr3). Radioluminescence and photoluminescence spectra collected from 8 to 300 K reveal multiple emission features, with several trap-related peaks disappearing at specific temperatures. These changes correlate with thermoluminescence measurements, which identify two prominent glow peaks corresponding to trap levels with activation energies of 69 and 126 meV, suggesting thermally driven release of carriers. Complementary current–voltage measurements performed at cryogenic temperatures exhibit clear trap-filled-limit and space-charge-limited current regimes, emerging only above 100 K. The absence of trap-filled-limit behavior at lower temperatures supports the presence of traps that hinder charge transport, consistent with the observed luminescence dynamics. Together, these results provide a coherent picture of thermal detrapping and carrier recombination in MAPbBr3, offering insights relevant to perovskite-based optoelectronic applications.

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The anatase and rutile phases of titanium dioxide (TiO₂) have been widely studied for their photocatalytic and electronic properties, while the brookite phase is rarely explored. The investigations of intrinsic magnetotransport in mixed-phase systems are limited. Magnetic susceptibility and magnetotransport measurements were performed between 2 K and 300 K in magnetic fields up to 12 T. Both samples with different anatase–rutile–brookite ratios exhibit Curie–Weiss susceptibility. Transport measurements reveal an insulating behavior at low temperatures with activation energies 1–20 meV and signatures of variable-range hopping (VRH) conduction. Strong positive magnetoresistance at low temperatures obeys the Efros–Shklovskii VRH model.