Electrical and optical properties of blue organic light-emitting devices fabricated utilizing color conversion CdSe and CdSe/ZnS quantum dots embedded in a poly(N-vibyl carbazole) hole transport layeropen access
- Authors
- Jeon, Young Pyo; Park, Sung June; Kim, Tae Whan
- Issue Date
- May-2012
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICAL MATERIALS EXPRESS, v.2, no.5, pp.663 - 670
- Indexed
- SCIE
SCOPUS
- Journal Title
- OPTICAL MATERIALS EXPRESS
- Volume
- 2
- Number
- 5
- Start Page
- 663
- End Page
- 670
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/165694
- DOI
- 10.1364/OME.2.000663
- ISSN
- 2159-3930
- Abstract
- Blue organic light-emitting devices (OLEDs) with color conversion quantum dots (QDs) embedded in a poly(N-vinyl carbazole) (PVK) hole transport layer (HTL) were fabricated. The absorbance and the photoluminescence spectra for the CdSe and the CdSe/ZnS QDs showed dominant exciton peaks. Current densities as functions of the voltage showed enhanced hole trapping and a decreased hole current in the OLEDs containing CdSe and CdSe/ZnS QDs embedded in a HTL. The phenomena were intensified due to the existence of the ZnS shell. The luminance-voltage curve and the electroluminescence spectra showed that the brightness of the blue OLEDs fabricated utilizing the HTL based on CdSe and CdSe/ZnS QDs embedded in a PVK layer reached over 3,000 cd/m(2) and that the dominant exciton peak was shifted to longer wavelength.
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