PbS Nanoparticles Capped with Tetrathiafulvalenetetracarboxylate: Utilizing Energy Level Alignment for Efficient Carrier Transport
Source abstract
Abstract
We fabricate a field-effect transistor by covalently functionalizing PbS nanoparticles with tetrathiafulvalenetetracarboxylate. Following experimental results from cyclic voltammetry and ambient-pressure X-ray photoelectron spectroscopy, we postulate a near-resonant alignment of the PbS 1Sh state and the organic HOMO, which is confirmed by atomistic calculations. Considering the large width of interparticle spacing, we observe an abnormally high field-effect hole mobility, which we attribute to the postulated resonance. In contrast to nanoparticle devices coupled through common short-chained ligands, our system maintains a large degree of macroscopic order as revealed by X-ray scattering. This provides a different approach to the design of hybrid organic-inorganic nanomaterials, circumvents the problem of phase segregation, and holds for versatile ways to design ordered, coupled nanoparticle thin films.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Department of Chemistry, University of California, Berkeley, California 94720, United States
Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
Funding
Alexander von Humboldt Foundation · Office of Basic Energy Sciences
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