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

Nano Letters
Antonio AiresAitziber L Cortajarena

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.

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Citations

Mar 16, 2021·Current Opinion in Structural Biology·Frances Gidley, Fabio Parmeggiani
Nov 4, 2020·ACS Applied Materials & Interfaces·Jia-Cheng YinXian-He Bu
Oct 8, 2021·Advanced Materials·Tiankai ChenJianping Xie
Oct 19, 2021·ACS Applied Polymer Materials·Yusheng Yuan, Niclas Solin
Nov 4, 2021·Accounts of Chemical Research·Kepa B UribeAitziber L Cortajarena

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