White electroluminescence from a poly(N-vinylcarbazole) layer doped with CdSe/CdS core-shell quantum dots
- 1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022 (China)
Description
Hybrid organic/inorganic white light-emitting diodes (LEDs) were fabricated of semiconductor polymer poly(N-vinylcarbazole) (PVK) doped with CdSe/CdS core-shell semiconductor quantum dots (QDs). The device, with a structure of indium-tin-oxide (ITO)|3,4-polyethylene-dioxythiophene-polystyrene sulfonate (PEDOT:PSS)|PVK:CdSe/CdS|Al, emitted a pure white light spanning the whole visible region from 400 to 800 nm. The Commission Internationale del'Eclairage coordinates (CIE) remained at x = 0.33,y = 0.34 at wide applied voltages. The maximum brightness and electroluminescence (EL) efficiency reached 180 cd m-2 at 19 V and 0.21 cd A-1 at current density of 2 mA cm-2, respectively. The realization of the pure white light emission is attributed to the incomplete energy and charge transfer from PVK to CdSe/CdS core-shell QDs
Availability note (English)
Available online at http://stacks.iop.org/0957-4484/17/4966/nano6_19_032.pdf or at the Web site for the journal Nanotechnology (Print) (ISSN 1361-6528 ) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0957-4484/17/4966/nano6_19_032.pdf; http://www.iop.org/;
- DOI
- 10.1088/0957-4484/17/19/032;
- PII
- S0957-4484(06)27874-7;
Publishing Information
- Journal Title
- Nanotechnology (Print)
- Journal Volume
- 17
- Journal Issue
- 19
- Journal Page Range
- p. 4966-4969
- ISSN
- 0957-4484
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38008717
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BRIGHTNESS; CADMIUM SELENIDES; CADMIUM SULFIDES; CARBAZOLES; CURRENT DENSITY; DOPED MATERIALS; ELECTRIC POTENTIAL; ELECTROLUMINESCENCE; INDIUM COMPOUNDS; LAYERS; LIGHT EMITTING DIODES; POLYETHYLENES; POLYSTYRENE; QUANTUM DOTS; SEMICONDUCTOR MATERIALS; TIN OXIDES; VISIBLE RADIATION
- Descriptors DEC
- AROMATICS; AZAARENES; AZOLES; CADMIUM COMPOUNDS; CHALCOGENIDES; ELECTROMAGNETIC RADIATION; EMISSION; HETEROCYCLIC COMPOUNDS; INORGANIC PHOSPHORS; LUMINESCENCE; MATERIALS; NANOSTRUCTURES; OPTICAL PROPERTIES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC POLYMERS; OXIDES; OXYGEN COMPOUNDS; PETROCHEMICALS; PETROLEUM PRODUCTS; PHOSPHORS; PHOTON EMISSION; PHYSICAL PROPERTIES; PLASTICS; POLYMERS; POLYOLEFINS; POLYVINYLS; RADIATIONS; SELENIDES; SELENIUM COMPOUNDS; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES; SULFIDES; SULFUR COMPOUNDS; SYNTHETIC MATERIALS; TIN COMPOUNDS