Dopant-Assisted Matrix Stabilization Enables Thermoelectric Performance Enhancement in n-Type Quantum Dot Films.

摘要: Efficient thermoelectric generators require further progress in developing n-type semiconductors that combine low thermal conductivity with high electrical conductivity. By embedding colloidal quantum dots (CQDs) a metal halide matrix (QDMH), the can enhance phonon scattering, thus suppressing transport; however, simultaneously achieving such systems has previously been limited by deleterious impact of large density interfaces on charge transport. Therefore, new strategies are needed to improve carrier transport without sacrificing matrix-enabled Here, we report use chemical doping solution state electron while maintaining QDMH films. incorporating cesium carbonate (Cs2CO3) salts as dopant prior formation, find stabilizes inks and enables efficient As result, this strategy leads an enhanced behavior solution-processed films near room temperature, 0.25 W m-1 K-1-significantly lower than based organic-ligand-cross-linked CQD (>0.6 K-1) spark-plasma-sintered (>1 K-1). This study provides pathway materials using single-step deposition low-temperature processing.