Thermal Properties of the Quaternary Chalcogenide BaCdSnSe₄

Abstract

The fields of nonlinear optics, photovoltaics, and thermoelectrics have been strongly impacted by materials research, and quaternary chalcogenides are one general class of materials that has recently generated strong interest. An understanding of the thermal properties is paramount in these and other applications of interest. The thermal properties of BaCdSnSe4, a quaternary chalcogenide that is of interest for applications in nonlinear optics, are reported. Specifically, the thermal conductivity over a large temperature range and heat capacity are evaluated in light of the structural features of this material. Low thermal conductivity results from the complex unit cell as well as local dynamic disorder from Cd in the CdSe4 tetrahedra in the crystal structure. The results and analyses reported herein are presented to enhance the fundamental understanding of the thermal properties of these materials, and can be related and applied to other quaternary chalcogenides that are of interest for energy‐related applications.

Structural and thermal properties of ultralow thermal conductivity Ba3Cu2Sn3Se10

“…In particular, the thermal properties of these materials have been shown to be directly related to their specific structural features. [16][17][18][19][20] One aspect that motivates the interest in these materials is their bonding and structural arrangement, in particular the coordination preferences of the metal and chalcogen atoms that comprise complex structural features that can result in anharmonicity. Many atoms per unit cell result in a large number of optic modes that typically have lower group velocities than the acoustic modes that often dominate thermal transport.…”

“…In particular, the thermal properties of these materials have been shown to be directly related to their specific structural features. 16–20…”

Optimal Design of Mid-Infrared Nonlinear-Optical Crystals: From SrZnSnSe4 to SrZnSiSe4

“…Many well-performed MIR NLO materials have emerged from the AM II M IV Q 4 (A = Ba, Sr; M II = Zn, Cd, Hg; M IV = Si, Ge, Sn; Q = S, Se) series of compounds, including SrZnGeS 4 , SrCdSiS 4 , SrZnSnS 4 , BaZnSnQ 4 (Q = S, Se), AHgSnQ 4 (A = Sr, Ba; Q = S, Se), and so on. − Our previous work has successfully synthesized the compound SrZnSnSe 4 in this system, which has a large second-harmonic-generation (SHG) effect (5 × AGS). However, the compound shows a relatively narrow band gap (1.82 eV), which may lead to the low LDT effect.…”