Remarkable thermoelectric property enhancement in Cu<sub>2</sub>SnS<sub>3</sub>–CuCo<sub>2</sub>S<sub>4</sub> nanocomposites <i>via</i> 3D modulation doping
Yan Gu, Wen Ai, Yaqing Zhao, Lin Pan, Chunhua Lu, Peng‐an Zong, Xiaohui Hu, Zhongzi Xu, Yifeng Wang
Abstract
Modulation doping due to charge transfer at interfaces with an appropriate band alignment led to a large power factor and a high <italic>ZT</italic> (∼0.83 at 773 K) in a Cu<sub>2</sub>SnS<sub>3</sub>-5 mol% CuCo<sub>2</sub>S<sub>4</sub> composite with a superior carrier mobility to uniformly doped Cu<sub>2</sub>SnS<sub>3</sub>.
Topics & Concepts
DopingMaterials scienceSeebeck coefficientThermoelectric effectElectron mobilityCondensed matter physicsCharge-carrier densityOptoelectronicsPhysicsThermal conductivityComposite materialThermodynamicsAdvanced Thermoelectric Materials and DevicesChalcogenide Semiconductor Thin FilmsPerovskite Materials and Applications