White Light AC Electroluminescent Displays

Hrabal, Michal; Zhivkov, I.; Guricová, Patrícia; Dobrikov, G. H.; Yordanov, Rumen; Vala, Martin

doi:10.1109/isse.2019.8810240

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…In general, our study is intended as a proof of concept that provides ample space for improvements. For example, operating conditions, such as frequency, and choice of other dielectric materials are important levers to further improve the luminance levels of ACEL devices. ,,,,, In addition, we want to point out that our tandem architecture is generally applicable for other emitting materials (with different colors) in the respective subdevices. As such, color tunability along other coordinates in the CIE diagram should be readily achievable.…”

Section: Resultsmentioning

confidence: 99%

“…White light ACEL has been demonstrated by using blue and orange emitting phosphor particles in one emission layer or on top of each other. 22,23 Opposed to these earlier reports, in our present study, we introduce a double-stacked ACEL device layout that allows us to operate the two emission zones of our devices individually. The resulting devices afford tunability of the emission color: orange−white−blue.…”

Section: ■ Introductionmentioning

confidence: 99%

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Bifacial Color-Tunable Electroluminescent Devices

Gahlmann

Tschorn²,

Maschwitz

et al. 2021

ACS Appl. Mater. Interfaces

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Alternate current electroluminescent (ACEL) devices provide a range of interesting properties, such as facile large-area processability, mechanical flexibility, and outstanding resilience, when compared with other large-area light-emitting technologies. To widen the scope of possible applications for ACEL devices, color tunability and white light emission are desirable. Here, we introduce a novel three-terminal device architecture based on two monolithically stacked ACEL devices (e.g., orange and blue) that allows for color tunability via independent operation of the subdevices. The tandem devices comprise semitransparent bottom and top electrodes based on networks of silver nanowires, which endow the tandem ACEL device with bifacial Janus-type emission. We provide a detailed analysis of the sources of optical losses in single and tandem ACEL devices. Our novel device concept enables novel facets of applications for ACEL in signage and lighting.

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