0000000000669164

AUTHOR

Daniel R. Gamelin

showing 3 related works from this author

Structural Metastability and Quantum Confinement in Zn1–xCoxO Nanoparticles

2016

This paper investigates the electronic structure of wurtzite (W) and rock-salt (RS) Zn1-xCoxO nanoparticles (NPs) by means of optical measurements under pressure (up to 25 GPa), X-ray absorption, and transmission electron microscopy. W-NPs were chemically synthesized at ambient conditions and RS-NPs were obtained by pressure-induced transformation of W-NPs. In contrast to the abrupt phase transition in W-Zn1-xCoxO as thin film or single crystal, occurring sharply at about 9 GPa, spectroscopic signatures of tetrahedral Co(2+) are observed in NPs from ambient pressure to about 17 GPa. Above this pressure, several changes in the absorption spectrum reveal a gradual and irreversible W-to-RS pha…

Phase transitionCondensed matter physicsAbsorption spectroscopyChemistryMechanical EngineeringBioengineering02 engineering and technologyGeneral ChemistryElectronic structure021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesAbsorption bandMetastability0103 physical sciencesGeneral Materials Science010306 general physics0210 nano-technologyAbsorption (electromagnetic radiation)Single crystalWurtzite crystal structureNano Letters
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State of the art and prospects for halide perovskite nanocrystals

2021

Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG Metal-halide perovskites have rapidly emerged as one of the most promising materials of the 21st century, with many exciting properties and great potential for a broad range of applications, from photovoltaics to optoelectronics and photocatalysis. The ease with which metal-halide perovskites can be synthesized in the form of brightly luminescent colloidal nanocrystals, as well as their tunable and intriguing optical and electronic properties, has attracted researchers from different disciplines of science and technology. In the last few years, there has been a significant progress in the shape-controlled synthesis of …

light-emitting devicesGeneral Physics and AstronomyNanotechnology02 engineering and technology010402 general chemistry01 natural sciences7. Clean energyphotocatalystsmetal-halide perovskite nanocrystalslead-free perovskite nanocrystalsPhotovoltaicsGeneral Materials ScienceNanoscience & NanotechnologyPerovskite (structure)Electronic propertiesPhysicsbusiness.industryPhysicsperovskite nanoplateletsGeneral Engineering021001 nanoscience & nanotechnology0104 chemical sciencesddc:Chemistryphotovoltaicsperovskite nanocubesmetal-halide perovskite nanocrystals; perovskite nanoplatelets; perovskite nanocubes; perovskite nanowires; lead-free perovskite nanocrystals; light-emitting devices; photovoltaics; lasers; photocatalysts; photodetectorsNanocrystalperovskite nanowiresphotodetectors2307 Química Física0210 nano-technologybusinessEngineering sciences. Technologylasers
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Photoluminescence in ZnO:Co2+ (0.01%–5%) Nanoparticles, Nanowires, Thin Films, and Single Crystals as a Function of Pressure and Temperature: Explori…

2014

This work investigates the electronic structure and photoluminescence properties of Co2+-doped ZnO and their pressure and temperature dependences through high-resolution absorption and emission spe...

PhotoluminescenceMaterials scienceCondensed Matter::Otherbusiness.industryGeneral Chemical EngineeringNanowireElectron phononNanoparticleNanotechnologyGeneral ChemistryElectronic structureCondensed Matter::Materials ScienceMaterials ChemistryOptoelectronicsThin filmAbsorption (electromagnetic radiation)businessChemistry of Materials
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