Conducting polymer based thermoelectric composites have received an increasing attention due to their inexpensive process, low thermal conductivity, durability and flexibility in last few years. Compositing polymer with chalcogenides imparts enhancement of properties by suitable choice of dopant. The performance of Polypyrrole-bismuth selenide (PPYBS) and polypyrrole-nickel doped bismuth selenide (PPYBSN) composites synthesized solvothermally followed by chemical oxidative in situ polymerization technique for thermoelectric applications are compared. X-ray diffraction (XRD) pattern confirms the uniform growth of polypyrrole (PPY) matrix on Bi₂Se₃ nanoplates. Williamson-Hall (W-H) plots give crystallite size 26.3 and 22.9 nm for PPYBS and PPYBSN respectively. Comparative results for both the samples are further analysed employing density functional theory (DFT) to explore the underlying electronic structure and charge transfer processes in the nanocomposites which shows that after forming the composites with Bi₂Se₃ and nickel doped Bi₂Se₃density of state increases compared to pure PPY and hence conductivity increases from 1250 S/m to 1782 S/m and 2370 S/m respectively. Temperature variations of thermoelectric performance are measured in temperature range 303–373 K. Thermoelectric figure of merit (ZT) are 0.0108 and 0.0149 for PPYBS and PPYBSN respectively at room temperature.

近年来，基于导电聚合物的热电复合材料由于其廉价的工艺、低导热性、耐用性和柔韧性而受到越来越多的关注。通过选择合适的掺杂剂，将聚合物与硫属化物复合提高性能。比较了溶剂热合成的聚吡咯-硒化铋（PPYBS）和聚吡咯-镍掺杂的硒化铋（PPYBSN）复合材料在热电应用中的性能。X 射线衍射 (XRD) 图案证实了聚吡咯 (PPY) 基体在 Bi ₂ Se _{3上的均匀生长}纳米板。Williamson-Hall (WH) 图给出了 PPYBS 和 PPYBSN 的微晶尺寸分别为 26.3 和 22.9 nm。使用密度泛函理论 (DFT) 进一步分析了两种样品的比较结果，以探索纳米复合材料中潜在的电子结构和电荷转移过程，这表明在形成具有 Bi ₂ Se ₃和镍掺杂 Bi ₂ Se ₃的复合材料后，密度为与纯 PPY 相比，状态增加，因此电导率分别从 1250 S/m 增加到 1782 S/m 和 2370 S/m。热电性能的温度变化是在 303–373 K 的温度范围内测量的。在室温下，PPYBS 和 PPYBSN 的热电品质因数 (ZT) 分别为 0.0108 和 0.0149。