High-pressure synchrotron XRD, Raman, PL, and absorption measurements on Rb2TeBr6 show cubic stability to 8 GPa with PL enhancement to 2.4 GPa, followed by orthorhombic, monoclinic, and amorphous phases plus continuous band-gap narrowing.
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Pressure-Driven Phase Evolution and Optoelectronic Properties of Lead-free Halide Perovskite Rb$_2$TeBr$_6$
High-pressure synchrotron XRD, Raman, PL, and absorption measurements on Rb2TeBr6 show cubic stability to 8 GPa with PL enhancement to 2.4 GPa, followed by orthorhombic, monoclinic, and amorphous phases plus continuous band-gap narrowing.