Phase transitions of β-ZnTe(en)0.5 under hydrostatic pressure
Source abstract
Abstract
Organic–inorganic hybrid semiconductors have enhanced and distinctive material properties. β-ZnTe(en)0.5, which consists of alternating layers of two-monolayer-thick zinc telluride (ZnTe) and ethylenediamine (en), exhibits high crystallinity, stability, and tunable optical properties. Using x-ray diffraction (XRD) and Fourier transform infrared spectroscopy, this study investigated the structural response of β-ZnTe(en)0.5 to applied hydrostatic pressure. Pressure-induced phase transitions were observed at 2.1 and 3.3 GPa. Shifts in the XRD peaks indicate substantial anisotropy in the pressure response, with the layer stacking direction (b axis) exhibiting high compressibility. The a and b lattice parameters showed −0.55% strain/GPa and −2.26% strain/GPa, respectively, contradicting theoretical calculations that predicted a more isotropic response. IR spectroscopy revealed abrupt changes in NH2 and CH2 vibrational modes corresponding to the phase transitions.
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Research context
OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics and Astronomy, Washington State University 1 , Pullman, Washington 99164-2814,
Electrical and Computer Engineering Department, The University of North Carolina at Charlotte 2 , Charlotte, North Carolina 28223-0001,
Chemistry Department, The University of North Carolina at Charlotte 3 , Charlotte, North Carolina 28223-0001,
Funding
Basic Energy Sciences · Army Research Office · MJ Murdock Charitable Trust
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