Oxide semiconductors for thermoelectric: The challenges and future

• DOI: 10.1111/jace.19464
• Publication Date: 2023-09-13T07:03:45Z
• Authors: Bangzhi Ge; Ruoyan Li; Guohao Wang; Menghua Zhu; Chongjian Zhou
• Keywords: Electronegativity

Abstract The oxide thermoelectric (TE) ceramics have continued to attract the focus due their high stability and low cost. However, TE performance falls obviously backward with typical compounds such as PbTe. Here, we revealed reason for difficulty of optimized is large electronegativity difference between metal O ions in oxide, which results strong electron localization bond energy. former leads unfavorable electrical properties latter a lattice thermal conductivity. Focusing on these issues, briefly reviewed strategies optimization including carrier concentration optimization, band gap tuning, density state resonance, well suppression involving weakened bond, entropy, grain size engineering, hierarchical architecture, textured polycrystal, composite ceramics. Finally, proposed several possible perspectives n‐type ceramics, anisotropy, predicted new oxides further breakthroughs properties.