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Effect of Poly-TPD Molecular Weight on the Characteristics of Quantum-Dot Light-Emitting Devices
- Authors
- Jo, Min-Ji; Moon, Dae-Gyu
- Issue Date
- Jul-2015
- Publisher
- American Scientific Publishers
- Keywords
- Colloidal Quantum-Dot; QD-LED; Poly-TPD; Molecular Weight
- Citation
- Journal of Nanoscience and Nanotechnology, v.15, no.7, pp 5066 - 5069
- Pages
- 4
- Journal Title
- Journal of Nanoscience and Nanotechnology
- Volume
- 15
- Number
- 7
- Start Page
- 5066
- End Page
- 5069
- ISSN
- 1533-4880
1533-4899
- Abstract
- We have investigated the effect of poly-TPD molecular weight (Mw) on the characteristics of CdSe/ZnS quantum-dot light-emitting devices (OD-LEDs). The poly-TPDs with Mw = 24000 and 84000 were used for hole-transporting layer. The Mw = 24000 poly-TPD layer was seriously dissolved by toluene which was used for the dispersion of QDs, resulting in substantial thickness reduction during the spin-coating of QD layer. The emission, external quantum efficiency, and driving characteristics of the QD-LEDs were investigated. A maximum external quantum efficiency of 2.1% was obtained in the QD-LED with Mw= 84000 poly-TPD layer.
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Related Researcher
- Moon, Dae Gyu
- College of Engineering (Department of Display Materials Engineering)