Micropatterned Down-Converting Coating for White Bio-Hybrid Light-Emitting Diodes

Lukas Niklaus, Samira Tansaz, Haider Dakhil, Katharina T. Weber, Marlene Pröschel, Martina Lang, Monika Kostrzewa, Pedro B. Coto, Rainer Detsch, Uwe Sonnewald, Andreas Wierschem, Aldo R. Boccaccini, Rubén D. Costa

研究成果: Article

21 引用 (Scopus)

抜粋

White hybrid light-emitting diodes (WHLEDs) are considered as a solid approach toward environmentally sustainable lighting sources that meet the “Green Photonics” requirements. Here, WHLEDs with protein-based down-converting coatings, i.e., Bio-WHLEDs, are demonstrated and exhibit worthy white color quality, luminous efficiency, and stability values. The coatings feature a multilayered cascade-like architecture with thicknesses of 1–3 mm. This limits the efficiency due to the low optical transmittance. Thus, submillimeter coatings, where the location of the proteins is well-defined, are highly desired. It is in this context where the thrust of this work sets in. Here, a straightforward way to design microstructured single-layer coatings, in which the proteins are placed at our command by using 3D printing, is presented. Based on comprehensive spectroscopic and rheological investigations, the optimization of the matrix and the plotting to prepare different micropatterns, i.e., lines, open-grids, and closed-grids, is rationalized. The latter are applied to prepare Bio-WHLEDs with ≈5-fold enhancement of the luminous efficiency compared to the reference devices with a cascade-like coating, without losing stability and color quality. As such, this work shows a new route to exploit proteins for optoelectronics, setting a new avenue of research into the emerging field of Bio-WHLEDs.

元の言語English
記事番号1601792
ジャーナルAdvanced Functional Materials
27
発行部数1
DOI
出版物ステータスPublished - 2017 1 5
外部発表Yes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    Niklaus, L., Tansaz, S., Dakhil, H., Weber, K. T., Pröschel, M., Lang, M., Kostrzewa, M., Coto, P. B., Detsch, R., Sonnewald, U., Wierschem, A., Boccaccini, A. R., & Costa, R. D. (2017). Micropatterned Down-Converting Coating for White Bio-Hybrid Light-Emitting Diodes. Advanced Functional Materials, 27(1), [1601792]. https://doi.org/10.1002/adfm.201601792