Journal article
Highly Passivated n-Type Colloidal Quantum Dots for Solution-Processed Thermoelectric Generators with Large Output Voltage
Advanced energy materials, v 9(28), 1901244
01 Jul 2019
Abstract
Colloidal quantum dots (CQDs) are attractive materials for thermoelectric applications due to their simple and low-cost processing; advantageously, they also offer low thermal conductivity and high Seebeck coefficient. To date, the majority of CQD thermoelectric films reported upon have been p-type, while only a few reports are available on n-type films. High-performing n- and p-type films are essential for thermoelectric generators (TEGs) with large output voltage and power. Here, high-thermoelectric-performance n-type CQD films are reported and showcased in high-performance all-CQD TEGs. By engineering the electronic coupling in the films, a thorough removal of insulating ligands is achieved and this is combined with excellent surface trap passivation. This enables a high thermoelectric power factor of 24 mu W m(-1) K-2, superior to previously reported n-type lead chalcogenide CQD films operating near room temperature (<1 mu W m(-1) K-2). As a result, an all-CQD film TEG with a large output voltage of 0.25 V and a power density of 0.63 W m(-2) at increment T = 50 K is demonstrated, which represents an over fourfold enhancement to previously reported p-type only CQD TEGs.
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Details
- Title
- Highly Passivated n-Type Colloidal Quantum Dots for Solution-Processed Thermoelectric Generators with Large Output Voltage
- Creators
- Mohamad I. Nugraha - King Abdullah University of Science and TechnologyHyunho Kim - King Abdullah University of Science and TechnologyBin Sun - University of TorontoSaheena Desai - King Abdullah University of Science and TechnologyF. Pelayo Garcia de Arquer - University of TorontoEdward H. Sargent - University of TorontoHusam N. Alshareef - King Abdullah University of Science and TechnologyDerya Baran - King Abdullah University of Science and Technology
- Publication Details
- Advanced energy materials, v 9(28), 1901244
- Publisher
- Wiley
- Number of pages
- 9
- Grant note
- OSR-CRG2018-3737 / King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000477664700003
- Scopus ID
- 2-s2.0-85068110492
- Other Identifier
- 991022059921904721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Energy & Fuels
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter