High-Stability, High-Efficiency Organic Monoliths Made of Oligomer Nanoparticles Wrapped in Organic Matrix
| Autor: | Zeliha Soran-Erdem, Talha Erdem, Jousheed Pennakalathil, Kivanc Gungor, Dönüs Tuncel, Hilmi Volkan Demir |
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| Přispěvatelé: | School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Demir, Hilmi Volkan |
| Rok vydání: | 2016 |
| Předmět: |
Light-emitting Diodes
Chemical substance Materials science Passivation General Physics and Astronomy Nanoparticle Quantum yield Nanotechnology Efficiency Crystalline hosts 02 engineering and technology Photonic application 010402 general chemistry 7. Clean energy 01 natural sciences Oligomer Proof of concept law.invention Fluorescent Monoliths chemistry.chemical_compound Solid state lighting law General Materials Science Lighting Temperature General Engineering Optical features Low-temperature stability 021001 nanoscience & nanotechnology Light emitting diodes 0104 chemical sciences Solid-state lighting chemistry Chemical engineering Oligomers Quantum theory Sugar (sucrose) Nanoparticles Monolithic integrated circuits Temperature stability 0210 nano-technology Dispersion (chemistry) Science technology and society Stability |
| Zdroj: | ACS Nano |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.6b01473 |
| Popis: | 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 ∼6%. We further showed ∼3-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-of-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. NRF (Natl Research Foundation, S’pore) Accepted version |
| Databáze: | OpenAIRE |
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