Characterization of Ag/ZnS/Ag multilayered film as transparent electrode for organic light-emitting diode

Ohara, Masashi; Ugajin, Mai; Kiba, Takayuki; Kawamura, Midori; Abe, Yoshio; Kim, Kyung Ho

doi:10.1016/j.tsf.2020.137999

Cited by 3 publications

(2 citation statements)

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“…In our previous study, we investigated Ag/ZnS/Ag (AZA) multilayer structures and their performance as anodes for green OLEDs. 19 The variation of the electroluminescence (EL) spectra with the dielectric film thickness and the resulting color changes were observed. We found that the direction of the emission peak shift does not have a straightforward relationship with the ZnS interlayer thickness, which differs from our expectation of a linear change.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The low sheet resistance ,, and wavelength-specific light transmission of the MDM structure enable the fabrication of OLEDs with MDM electrodes in which the emission wavelength can be varied by changing only the film thickness of the MDM dielectric layer. In our previous study, we investigated Ag/ZnS/Ag (AZA) multilayer structures and their performance as anodes for green OLEDs . The variation of the electroluminescence (EL) spectra with the dielectric film thickness and the resulting color changes were observed.…”

Section: Introductionmentioning

confidence: 99%

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Emission Wavelength Control Based on Coupling of Surface Plasmon and Microcavity Mode in Organic Light-Emitting Diodes with Metal/Dielectric/Metal Anodes

Masuda,

Kiba,

Kawamura

et al. 2024

ACS Photonics

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Ag/ZnS/Ag (AZA) multilayer films with various ZnS interlayer thicknesses were deposited on glass substrates via thermal vacuum evaporation. The sheet resistances, work functions, transmittances, and reflectances of the AZA structures were characterized to evaluate whether their electrical and optical properties are suitable for application as organic light-emitting diode (OLED) electrodes. The transmittance peak and reflectance dip could be red-shifted by changing the interlayer thickness of the AZA structure, which resulted in a surface plasmon (SP) color filter effect. OLED devices with AZA multilayers of different interlayer thicknesses were then fabricated. Instead of the expected red shift in the emission spectrum due to the surface plasmon color filter effect of the AZA structure, two electroluminescence (EL) peaks were obtained in the AZA OLEDs with 45 and 60 nm thick ZnS interlayers. From the results of the finite-difference time-domain calculations, we conclude that the two split EL peaks are attributed to mode coupling between the optically active surface plasmons of the AZA structure and the microcavity of the OLED structure. The proposed OLED design with a metal/dielectric/metal electrode allows the control of the EL spectral shape and emission color without changing the thickness of the OLED organic layers.

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Section: ■ Introductionmentioning

confidence: 99%