journal article·2015-06-23

Stable Dispersion of Iodide-Capped PbSe Quantum Dots for High-Performance Low-Temperature Processed Electronics and Optoelectronics

Vladimir Sayevich, Nikolai Gaponik, Matthias Plötner, Marta Kruszynska, Thomas Gemming, Volodymyr M. Dzhagan, Shahab Akhavan, Dietrich R. T. Zahn, Hilmi Volkan Demir, Alexander Eychmüller

Chemistry of Materials· Volume 27· Issue 12
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Abstract

Here, we present a ligand exchange of long insulating molecules with short, robust, and environmentally friendly iodide ions via a mild flocculation of PbSe nanocrystals (NCs). This ligand exchange leads to the formation of stable colloidal solutions in various polar solvents and in a broad concentration range via electrostatic repulsion. The iodide capping ligands preserve the electronic structure and maintain the optical properties of the PbSe NCs, both in solution and in the form of solid films. The spin-coated PbSe NC solids exhibit good transport characteristics with electron mobilities in the linear and saturation regimes reaching (2.1 ± 0.3) cm 2 /(V·s) and (2.9 ± 0.4) cm 2 /(V·s), respectively. This opens up opportunities for the low-cost and low-temperature fabrication of NC thin films being attractive for applications in the fields of electronics and optoelectronics.
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Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Copper-based nanomaterials and applications · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Physical Chemistry and Center for Advancing Electronics Dresden, TU Dresden, Bergstr. 66b, 01062 Dresden, Germany

Electrical and Computer Engineering, Institute of Semiconductors and Microsystems, Nöthnitzer Straße 64, 01187 Dresden, Germany

Institute for Complex Materials, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany

Semiconductor Physics, Technische Universität Chemnitz, D-09107 Chemnitz, Germany

Department of Physics, Department of Electrical and Electronics Engineering, UNAM—Institute of Materials Science and Nanotechnology, Bilkent University, TR-06800, Ankara, Turkey

Luminous! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore

Funding

Türkiye Bilimler Akademisi · Bundesministerium für Bildung und Forschung · Deutsche Forschungsgemeinschaft · European Heads of Research Councils · Seventh Framework Programme · Türkiye Bilimsel ve Teknolojik Arastirma Kurumu · European Science Foundation

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