Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 8, Pages 1599-1605Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc03955j
Keywords
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Funding
- Ministry of Science and Technology [MOST 103-2112-M-003-008-MY3, MOST 104-2221-E-009-173, MOST 104-2221-E-009-167]
- National Chiao Tung University [104W986]
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In this study, we demonstrate solid-state white light-emitting electrochemical cells (LECs) using an integrated plasmonic notch filter to tailor the electroluminescence (EL) spectrum of non-doped blue-green emissive material. The plasmonic notch filter is composed of randomly distributed silver nanoparticles (Ag-NPs) embedded in the anode contact of indium tin oxide (ITO). This plasmonic notch filter strongly absorbs green light due to local surface plasmon (LSP) resonance of the Ag-NPs embedded in ITO. Thus, the emission green light of the solid-state LEC is strongly suppressed, leaving the blue and red light output to generate a white EL emission. Moreover, the duration of white EL can be maintained for a longer time under operation, which overcomes the issues regarding the short lifetime of white EL generated by the microcavity effect. In addition, the Ag-NPs can be readily fabricated by the thermal annealing of Ag film, which is compatible with current fabrication technologies typically used in light-emitting diode (LED) industry. Therefore, solid-state white LECs using an integrated on-chip plasmonic notch filter have great potential for applications in solid-state lighting.
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