Ultrahigh in-plane thermoelectric performance in self-assembled PbSe:Au films with vertically aligned nanopillars
Source abstract
Abstract
Self-assembled nanocomposites with tunable physical properties have potential applications in advanced devices. In this work, we fabricated self-assembled PbSe:Au films with vertically aligned nanopillars (VANs) by pulsed laser deposition. We used scanning tunneling microscopy to evaluate detailed heterostructures at atomic resolution. The results indicate that we prepared self-assembled Au nanopillars in a PbSe matrix. Compared with the PbSe matrix, the PbSe:Au vertical interface can facilitate the energy-filter effect and lower the in-plane thermal conductivity. The maximum ZT values for an n-type self-assembled VAN film is ∼2.6 at 523 K, which is ∼520% higher than that of a pure PbSe film ( ZT = 0.5). This study suggests that the vertical interface in the unique VAN described here provides a viable route to manipulate the thermoelectric properties of thermoelectric materials.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Quantum Dots Synthesis And Properties · Advanced Thermodynamics and Statistical Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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