Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 24, Issue 28, Pages 4484-4490Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201400167
Keywords
-
Categories
Funding
- National Science Foundation through Center for Hierarchical Manufacturing (CHM) at UMass Amherst [CMMI-1025020]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0906695] Funding Source: National Science Foundation
Ask authors/readers for more resources
Novel light emitting electrochemical cells (LECs) are fabricated using CdSe-CdS (core-shell) quantum dots (QDs) of tuned size and emission blended with polyvinylcarbazole (PVK) and the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF6). The performances of cells constructed using sequential device layers of indium tin oxide (ITO), poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS), the QD/PVK/IL active layer, and Al are evaluated. Only color saturated electroluminescence from the QDs is observed, without any other emissions from the polymer host or the electrolyte. Blue, green, and red QD-LECs are prepared. The maximum brightness (approximate to 1000 cd m(-2)) and current efficiency (1.9 cd A(-1)) are comparable to polymer LECs and multilayer QD-LEDs. White-light QD-LECs with Commission Internationale d'Eclairage (CIE) coordinates (0.33, 0.33) are prepared by tuning the mass ratio of R:G:B QDs in the active layer and voltage applied. Transparent QD-LECs fabricated using transparent silver nanowire (AgNW) composites as the cathode yield an average transmittance greater than 88% over the visible range. Flexible devices are demonstrated by replacing the glass substrates with polyethylene terephthalate (PET).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available