Electroluminescence of colloidal quasi-two-dimensional semiconducting CdSe nanostructures in a hybrid light-emitting diode

We report on the results of studying quasi-two-dimensional nanostructures synthesized here in the form of semiconducting CdSe nanoplatelets with a characteristic longitudinal size of 20–70 nm and a thick-ness of a few atomic layers. Their morphology is studied using TEM and AFM and X-ray diffraction...

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Bibliographic Details
Published inJournal of experimental and theoretical physics Vol. 120; no. 4; pp. 595 - 606
Main Authors Selyukov, A. S., Vitukhnovskii, A. G., Lebedev, V. S., Vashchenko, A. A., Vasiliev, R. B., Sokolikova, M. S.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2015
Springer
Subjects
Analysis
ATOMIC FORCE MICROSCOPY
Atoms
CADMIUM SELENIDES
Classical and Quantum Gravitation
COLOR
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystals
Diffraction
ELECTRIC POTENTIAL
ELECTROLUMINESCENCE
ELECTRONS
Elementary Particles
HOLES
LAYERS
LIGHT EMITTING DIODES
Molecules
MORPHOLOGY
NANOSCIENCE AND NANOTECHNOLOGY
Optics
ORGANIC MATTER
Particle and Nuclear Physics
PHOTOLUMINESCENCE
Physics
Physics and Astronomy
Quantum Field Theory
QUANTUM WELLS
Relativity Theory
Solid State Physics
Structure
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
TWO-DIMENSIONAL SYSTEMS
X-RAY DIFFRACTION
X-rays
Photoluminescence Spectrum
Cadmium Acetate
Transport Layer
Quantum Well
Electroluminescence Spectrum
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Summary:We report on the results of studying quasi-two-dimensional nanostructures synthesized here in the form of semiconducting CdSe nanoplatelets with a characteristic longitudinal size of 20–70 nm and a thick-ness of a few atomic layers. Their morphology is studied using TEM and AFM and X-ray diffraction analysis; the crystal structure and sizes are determined. At room and cryogenic temperatures, the spectra and kinetics of the photoluminescence of such structures (quantum wells) are investigated. A hybrid light-emitting diode operating on the basis of CdSe nanoplatelets as a plane active element (emitter) is developed using the organic materials TAZ and TPD to form electron and hole transport layers, respectively. The spectral and current-voltage characteristics of the constructed device with a radiation wavelength λ = 515 nm are obtained. The device triggering voltage is 5.5 V (visible glow). The use of quasi-two-dimensional structures of this type is promising for hybrid light-emitting diodes with pure color and low operating voltages.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776115040238