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Colloidal Quantum Dot Nanocrystals for Optoelectronic Applications

Title
Colloidal Quantum Dot Nanocrystals for Optoelectronic Applications
Authors
Kim, Younghoon
DGIST Authors
Kim, Younghoon
Issue Date
2018-10-04
Citation
2018 한국태양광발전학회 추계학술대회
Type
Conference
Abstract
Chalcogenide- and perovskite-nanocrystals (i.e., colloidal quantum dots) are a promising semiconductor, which is utilized in solar cells and light-emitting diodes as a photoactive material, due to their solution processibility, size- and composition-tunable bandgaps, excellent photophysical properties and cost-effective large scale productions. We demonstrate the solar cell applications of colloidal nanocrystals, such as lead sulfide (PbS), silver bismuth sulfide (AgBiS2), cesium lead iodide (CsPbI3). These are prepared via hot-injection synthetic routes with long hydrocarbon surface ligands of oleic acid, leading to the dispersion in organic solvent. The original ligands of as-synthesized colloidal nanocrystals, which show the insulating properties, must be replaced with short chain and/or inorganic ligands in order to improve the charge transporting properties inside thin films. We also must consider kinds of ligand materials, thin film thickness as well as device architectures for further enhanced solar cell performance. Considering all these properties, we show the perspective and recent research trend of colloidal nanocrystal-based photovoltaic applications.
URI
http://hdl.handle.net/20.500.11750/14751
Publisher
한국태양광발전학회
Files:
There are no files associated with this item.
Collection:
Division of Energy Technology2. Conference Papers


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