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Flexible Multicolor Electroluminescent Devices on Cellulose Nanocrystal Platform
Author(s) -
Badkoobehhezaveh Amir Masoud,
Hopmann Eric,
Elezzabi Abdulhakem Y.
Publication year - 2020
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201901452
Subject(s) - electroluminescence , materials science , nanocrystal , phosphorescence , luminescence , optoelectronics , rhodamine 6g , nanotechnology , electroluminescent display , phosphor , layer (electronics) , nanowire , optics , fluorescence , physics
In this work, flexible electroluminescent devices (FELDs) are demonstrated using environmentally‐friendly cellulose nanocrystal (CNC) substrates with a silver nanowire conductive network. The CNC sheets with drop‐casted silver nanowires act as highly transparent conductive electrodes for an electroluminescent layer (a phosphorescent ink containing Cu/Br‐doped ZnS microparticles). This phosphorescent device requires operating voltages as low as 7 V and achieves high luminance of up to 43 Cd m −2 (at 50 V). Furthermore, through impregnating the CNC host material with Rhodamine 6G or Thiazol Yellow G, different emission colors are achieved: blue, turquoise, green, and purple light emission having a broad (400–650 nm) luminescence spectrum are obtained. This device, which uses earth‐abundant, cost‐effective, and recyclable materials, is envisioned to lead to advancements in the areas of electronics and lighting technology.