Sensitive Thermochromic Behavior of InSeI, a Highly Anisotropic and Tubular 1D van der Waals Crystal.

Autor: Cordova DLM; Department of Chemistry, University of California, Irvine, CA, 92697, USA., Zhou Y; Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA., Milligan GM; Department of Chemistry, University of California, Irvine, CA, 92697, USA., Cheng L; Department of Chemistry, University of California, Irvine, CA, 92697, USA., Kerr T; Department of Chemistry, University of California, Irvine, CA, 92697, USA., Ziller J; Department of Chemistry, University of California, Irvine, CA, 92697, USA., Wu R; Department of Physics and Astronomy, University of California, Irvine, CA, 92697, USA., Arguilla MQ; Department of Chemistry, University of California, Irvine, CA, 92697, USA.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 May; Vol. 36 (21), pp. e2312597. Date of Electronic Publication: 2024 Feb 13.
DOI: 10.1002/adma.202312597
Abstrakt: Thermochromism, the change in color of a material with temperature, is the fundamental basis of optical thermometry. A longstanding challenge in realizing sensitive optical thermometers for widespread use is identifying materials with pronounced thermometric optical performance in the visible range. Herein, it is demonstrated that single crystals of indium selenium iodide (InSeI), a 1D van der Waals (vdW) solid consisting of weakly bound helical chains, exhibit considerable visible range thermochromism. A strong temperature-dependent optical band edge absorption shift ranging from 450 to 530 nm (2.8 to 2.3 eV) over a 380 K temperature range with an experimental (dE g /dT) max value extracted to be 1.26 × 10 -3 eV K -1 is shown. This value lies appreciably above most dense conventional semiconductors in the visible range and is comparable to soft lattice solids. The authors further seek to understand the origin of this unusually sensitive thermochromic behavior and find that it arises from strong electron-phonon interactions and anharmonic phonons that significantly broaden band edges and lower the E g with increasing temperature. The identification of structural signatures resulting in sensitive thermochromism in 1D vdW crystals opens avenues in discovering low-dimensional solids with strong temperature-dependent optical responses across broad spectral windows, dimensionalities, and size regimes.
(© 2024 The Authors. Advanced Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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