Low-Temperature-Processed Colloidal Quantum Dots as Building Blocks for Thermoelectrics

Mohamad I. Nugraha, Hyunho Kim, Bin Sun, Mohammed Haque, Francisco Pelayo Garcia de Arquer, Diego Rosas Villalva, Abdulrahman El Labban, Edward H. Sargent, Husam N. Alshareef, Derya Baran

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Colloidal quantum dots (CQDs) are demonstrated to be promising materials to realize high-performance thermoelectrics owing to their low thermal conductivity. The most studied CQD films, however, are using long ligands that require high processing and operation temperature (>400 °C) to achieve optimum thermoelectric performance. Here the thermoelectric properties of CQD films cross-linked using short ligands that allow strong inter-QD coupling are reported. Using the ligands, p-type thermoelectric solids are demonstrated with a high Seebeck coefficient and power factor of 400 μV K−1 and 30 µW m−1 K−2, respectively, leading to maximum ZT of 0.02 at a lower measurement temperature (
Original languageEnglish (US)
Pages (from-to)1803049
JournalAdvanced Energy Materials
Volume9
Issue number13
DOIs
StatePublished - Feb 14 2019

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