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Stable White Light‐Emitting Biocomposite Films
Author(s) -
Gotta Julia,
Shalom Tal Ben,
Aslanoglou Stella,
CifuentesRius Anna,
Voelcker Nicolas H.,
Elnathan Roey,
Shoseyov Oded,
Richter Shachar
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201706967
Subject(s) - materials science , biocomposite , coating , light emitting diode , white light , nanocellulose , nanotechnology , optoelectronics , composite material , chemical engineering , cellulose , composite number , engineering
The demonstration of reliable and stable white light‐emitting diodes (LEDs) is one of the main technological challenges of the LED industry. This is usually accomplished by incorporation of light‐emitting rare‐earth elements (REEs) compounds within an external polymeric coating of a blue LED allowing the generation of white light. However, due to both environmental and cost issues, the development of low‐cost REE‐free coatings, which exhibit competitive performance compared to conventional white LED is of great importance. In this work, the formation of an REE‐free white LED coating is demonstrated. This biocomposite material, composed of biological (crystalline nanocellulose and porcine gastric mucin) and organic (light‐emitting dyes) compounds, exhibits excellent optical and mechanical properties as well as resistance to heat, humidity, and UV radiation. The coating is further used to demonstrate a working white LED by incorporating it within a commercial blue LED.