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

Journal Article · Wed Apr 15 04:00:00 EDT 2015 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776115040238· OSTI ID:22472317

Vitukhnovskii, A. G.; Lebedev, V. S.; Vashchenko, A. A. ^[1]; Vasiliev, R. B.; Sokolikova, M. S. ^[2]

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1. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
2. Moscow State University (Russian Federation)

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.

• OSTI ID: 22472317
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 4 Vol. 120; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ATOMIC FORCE MICROSCOPY
CADMIUM SELENIDES
COLOR
ELECTRIC POTENTIAL
ELECTROLUMINESCENCE
ELECTRONS
HOLES
LAYERS
LIGHT EMITTING DIODES
MORPHOLOGY
ORGANIC MATTER
PHOTOLUMINESCENCE
QUANTUM WELLS
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
TWO-DIMENSIONAL SYSTEMS
X-RAY DIFFRACTION