White-emitting Protein-Metal Nanocluster Phosphors for Highly Performing Biohybrid Light-Emitting Diodes

Antonio Aires, Verónica Fernández-Luna, Julio Fernández-Cestau, Rubén D. Costa, Aitziber L. Cortajarena

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

This work presents a simple in situ synthesis and stabilization of fluorescent gold nanoclusters (AuNCs) with different sizes using engineered protein scaffolds in water. The protein-AuNC hybrids show a dual emission (450 and 700 nm) with a record photoluminescence quantum yield of 20%. These features impelled us to apply them to biohybrid light-emitting diodes as color down-converting filters or biophosphors. Efficient white emission (x/y CIE color coordinates of 0.31/0.29) and stabilities of more than 800 h were achieved. This represents a 2 orders of magnitude enhancement compared to the prior art. Besides the outstanding performance, the protein scaffold also infers a unique anisotropic emission character that is considered as a proof-of-concept of high interest for single-point lighting and display.

Original languageEnglish
Pages (from-to)2710-2716
Number of pages7
JournalNano Letters
Volume20
Issue number4
DOIs
Publication statusPublished - 2020 Apr 8

Keywords

  • biohybrid materials
  • biophosphors
  • light-emitting diodes
  • metal nanocluster
  • protein design
  • repeat proteins

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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