The bismuth-tellurides have never ceased as the best candidates for thermoelectric (TE) coolers since the beginning of manufactures in the 1960s. As the years passed, the effort in boosting their performance continues abreast of breakthroughs in the conversion efficiencies with the occasional setbacks from the n-type alloys. Herein, a synergistic approach combining the phase diagram engineering and the carrier optimization overcomes the long-existing obstacle, eliciting an outperforming n-type Ag–Bi₂Te₃. The Ag_0.03Bi₂Te_2.97 alloy attains a high figure-of-merit zT = 1.4 at 363 K and a superior averaged zT_ave = 1.1 within 300 K–500 K. The phase diagram pinpoints a high-zT zone whose boundary coincides with the maximal Ag solubility. A close-up upon the best-performing Ag_0.03Bi₂Te_2.97 reveals the presence of Ag₂Te nano-precipitates, explaining its low-lying κ_L alongside the remarkable enhancement in its power factor PF = S²ρ⁻¹. The avenue paved by the thermodynamic route essentially revives the TE research field, in which more potential candidates are awaiting further discovery.

自1960年代开始生产以来，碲化铋就从未停止过成为热电（TE）冷却器的最佳候选者。随着时间的流逝，提高其性能的努力在转换效率方面取得了突破，其中偶尔会遇到n型合金的挫折。在本文中，将相图工程和载流子优化相结合的协同方法克服了长期存在的障碍，从而获得了性能优于n型的Ag-Bi ₂ Te ₃。Ag _0.03 Bi ₂ Te _2.97合金 在363 K时具有很高的品质因数zT = 1.4和卓越的平均zT_ave  = 1.1在300 K-500 K之间。相图指出了一个高zT区，其边界与最大的Ag溶解度一致。特写时效果最佳的银_0.03的Bi ₂特_2.97揭示了Ag的存在₂碲纳米沉淀，解释其低洼κ_大号一起在其功率因数显着提高PF  =小号² ρ ^-1。热力学途径铺平了道路，从根本上重振了TE研究领域，在该领域中，更多的潜在候选人正在等待进一步的发现。