Mg₂Si_1-xSn_x solid solutions have been of great interest for the advantages they hold as prospective thermoelectric (TE) materials. Despite this, the development of thermoelectric generator (TEG) modules fabricated entirely from these materials has not been reported. In this work, a TEG module consisting of Mg₂Si_0.3Sn_0.7 n and p legs has been fabricated, and its thermoelectric generator characteristics were studied as a function of the applied temperature gradient. For the n and p doped legs, compositions with peak zT values of ~1.6 and ~0.44, respectively, were synthesized using induction assisted melt synthesis. Mono-block sintering technique was adopted as a single-step compaction cum contacting technique. In order to create low resistive well-bonded contacts, an additional interfacial layer was placed between the TE material and the outer Cu layer. The TE legs were assembled into a skeletal module comprising of two unicouples electrically connected by Cu bridges. The transient state I-V characteristics of the TE device were measured at various temperature gradients (ΔT). A maximum power output value of 192mW (corresponds to a power density of 0.52 W/cm²) and open-circuit voltage of 200 mV were measured for a ΔT of 331 K. The measured I-V and power output data showed good agreement with the simulated power output values with a variation of only 3% until ΔT = 300 K and 5% at ΔT = 331 K. The TE module simulator was further used to estimate the device efficiency (η) and indicated a maximum value of 5%. This is the highest reported conversion efficiency of a silicide based module (in the studied temperature range) and highlights the possibility of their commercialization in the near future.

Mg ₂ Si _1-x Sn _x固溶体因其作为预期热电（TE）材料的优势而备受关注。尽管如此，尚未报道完全由这些材料制造的热电发电机 (TEG) 模块的开发。在这项工作中，制造了由 Mg ₂ Si _0.3 Sn _0.7 n和p腿组成的 TEG 模块，并研究了其热电发电机特性作为所施加温度梯度的函数。对于n和p掺杂腿，具有峰值zT 的成分分别为~1.6 和~0.44 的值是使用感应辅助熔体合成合成的。采用单块烧结技术作为单步压实和接触技术。为了创建低电阻的良好键合触点，在 TE 材料和外部 Cu 层之间放置了一个额外的界面层。TE 腿被组装成一个骨架模块，该模块包括两个通过铜桥电连接的单电偶。在各种温度梯度 ( ΔT )下测量了 TE 器件的瞬态 IV 特性。对于ΔT，测得的最大功率输出值为 192mW（对应于 0.52 W/cm ²的功率密度）和 200 mV 的开路电压331 K。测得的 IV 和功率输出数据与模拟功率输出值非常吻合，直到ΔT  = 300 K 时变化仅为 3%，在ΔT  = 331 K 时变化为5%。进一步使用 TE 模块模拟器来估计器件效率 ( η ) 并表示最大值为 5%。这是硅化物模块的最高转换效率（在研究的温度范围内），并强调了它们在不久的将来商业化的可能性。