High-Stability, High-Efficiency Organic Monoliths Made of Oligomer Nanoparticles Wrapped in Organic Matrix

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Soran-Erdem Z., ERDEM T., Gungor K., Pennakalathil J., Tuncel D., Demir H. V.

ACS NANO, vol.10, no.5, pp.5333-5339, 2016 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 5
  • Publication Date: 2016
  • Doi Number: 10.1021/acsnano.6b01473
  • Journal Name: ACS NANO
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.5333-5339
  • Keywords: oligomer nanoparticles, fluorescent monoliths, organic crystalline host, light-emitting diodes, solid-state lighting, CONJUGATED POLYMER NANOPARTICLES, LIGHT-EMITTING-DIODES, SOLAR-CELLS, SEMICONDUCTOR NANOPARTICLES, QUANTUM EFFICIENCY, DOTS, RED, NANOCRYSTALS, FLUORESCENCE, ENHANCEMENT
  • Abdullah Gül University Affiliated: Yes

Abstract

Oligomer nanoparticles (OL NPs) have been considered unsuitable for solid-state lighting due to their low quantum yields and low temperature stability of their emission. Here, we address these problems by forming highly emissive and stable OL NPs solids to make them applicable in lighting. For this purpose, we incorporated OL NPs into sucrose matrix and then prepared their all-organic monoliths. We show that wrapping the OL NPs in sucrose significantly increases their quantum yield up to 44%, while the efficiency of their dispersion and direct solid-film remain only at similar to 6%. further showed similar to-fold improved temperature stability of OL NP emission within these monoliths. Our experiments revealed that a physical passivation mechanism is responsible from these improvements. As a proof-concept demonstration, we successfully employed these high-stability, high-efficiency monoliths as color converters on a blue LED chip. Considering the improved optical features, low cost, and simplicity of the presented methodology, we believe that this study holds great promise for a ubiquitous use of organic OL NPs in lighting and possibly in other photonic applications.