Experiments reveal improved thermoelectric performance in Bi2Se2S compounds, suggesting effective doping methods.
Cs 3 Bi 2 I 6 Cl 3 doping forms a solid solution in Bi 2 Se 2 S, boosting carrier concentration. Meanwhile, multi-scale structural defects intensify full-spectrum phonon scattering, lowering thermal conductivity and yielding a peak ZT of 0.9.
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Luo et al. (2026) studied this question.
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