Based on the versatile combination of PbQ- and Bi2Q3-type (Q = S, Se, Te) fragments, we explored new compounds in the Pb/Bi/Se ternary system. The new class of compounds, Pb_5Bi_6Se_(14), Pb_5Pb_(12)Se_(23), and PbBi_8Se_(13) are homologues with different combination of alternating Bi_2Se_3- and PbSe-type layers, alpha- and beta -Pb_6Bi_2Se_9 were obtained in different synthetic conditions and the former is isostructural to heyrovskyite (Pb_6Bi_2S_9) while the latter is a NaCl-type cubic phase. Pb_5Bi_6Se_(14) shows a power factor of 11.2 mu W/cm centre dot K~2 with electrical conductivity of 657 S/cm and thermopower of -131 mu V/K at 271 K. The most significant characteristic of this material is the extremely low thermal conductivity of less than 1.0 W/m-K at room temperature. On the basis of these properties, a preliminary doping study for Pb_5Bi_6Se_(14) with Sn, Sb, and SbBr3 as dopants was undertaken and the results are presented in this report.
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机译：基于PBQ-和BI2Q3型（Q = S，SE，TE）片段的多功能组合，我们探讨了PB / BI / SE三元系统中的新化合物。新类化合物PB_5BI_6SE_（14），PB_5PB_（12）SE_（23）和PBBI_8SE_（13）是具有交替组合的同源物，交替的BI_2SE_3和PBSE类型层，α和β-PB_6BI_2SE_9不同合成条件和前者是对海洛温（PB_6BI_2S_9）的同时性的，而后者是NaCl型立方相。 PB_5BI_6SE_（14）显示了11.2μW/ cm中心点K〜2的功率因数，具有657 s / cm的电导率，271k的热电驱动率为-131μV/ k。这种材料的最显着特征是极端的在室温下低于1.0w / mk的低导热率。在这些性质的基础上，进行了作为掺杂剂的SN，Sb和Sbbr3的Pb_5bi_6se_（14）的初步掺杂研究，并在本报告中提出了结果。
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