Homopolymeric Protein Phosphors: Overpassing the Stability Frontier of Deep‐Red Bio‐Hybrid Light‐Emitting Diodes

Abstract: Although protein‐polymer phosphors are an emerging photon‐management filter concept for hybrid light‐emitting diodes, deep‐red‐emitting devices based on archetypal fluorescent proteins (FPs; mCherry) are still poorly performing with lifetimes <50 h under high photon‐flux excitation and ambient conditions. Here, the challenge is two‐fold: i) understanding the deactivation mechanism of red‐emitting FP‐polymer coatings and, in turn, ii) identifying the best polymer design for highly stable devices. This study first provides comprehensive photophysical/thermal/structural studies and device degradation (ambient/inert) analysis, revealing the presence of photo‐induced cis–trans isomerization and the effect of oxygen and water on the deactivation of mCherry in reference polymer coatings. Based on these findings, a new bio‐phosphor configuration using polyvinyl alcohol derivatives, in which crystallinity and amount of trapped water (stiffness and oxygen/moisture barriers) are easily controlled by the hydroxylation degree, is successfully achieved. Compared to the prior art, these devices significantly outperform the reference stability (>50‐fold enhancement), showing a brightness loss of <5% over the first 2000 h and a final device lifetime of 2600 h. Hence, this study describes a unique rationale toward designing polymers to stabilize FPs for lighting, overpassing stability frontiers in deep‐red hybrid light‐emitting diodes (HLEDs) going from hours to months.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Homopolymeric Protein Phosphors: Overpassing the Stability Frontier of Deep‐Red Bio‐Hybrid Light‐Emitting Diodes ; day:21 ; month:03 ; year:2023 ; extent:10 ; Advanced functional materials ; (21.03.2023) (gesamt 10)

Contributors, Places and Time

• Creator: Ferrara, Sara ; Fernandéz‐Blázquez, Juan P. ; Fuenzalida Werner, Juan Pablo ; Costa, Rubén D.

Further information

• DOI: 10.1002/adfm.202300350
• URN: urn:nbn:de:101:1-2023032114163940465992
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 10:45 AM CEST