Highly Efficient Photon Upconversion in Self-Assembled Light-Harvesting Molecular Systems
Open Access
- 9 June 2015
- journal article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 5 (1), 10882
- https://doi.org/10.1038/srep10882
Abstract
To meet the world’s demands on the development of sunlight-powered renewable energy production, triplet–triplet annihilation-based photon upconversion (TTA–UC) has raised great expectations. However, an ideal highly efficient, low-power and in-air TTA–UC has not been achieved. Here, we report a novel self-assembly approach to achieve this, which enabled highly efficient TTA–UC even in the presence of oxygen. A newly developed lipophilic 9,10-diphenylanthracene-based emitter molecule functionalized with multiple hydrogen-bonding moieties spontaneously coassembled with a triplet sensitizer in organic media, showing efficient triplet sensitization and subsequent triplet energy migration among the preorganized chromophores. This supramolecular light-harvesting system shows a high UC quantum yield of 30% optimized at low excitation power in deaerated conditions. Significantly, the UC emission largely remains even in an air-saturated solution and this approach is facilely applicable to organogel and solid-film systems.This publication has 52 references indexed in Scilit:
- High Efficiency Up‐Converting Single Phase Elastomers for Photon Managing ApplicationsAdvanced Energy Materials, 2013
- Low power, non-coherent sensitized photon up-conversion: modelling and perspectivesPhysical Chemistry Chemical Physics, 2012
- Molecular gel-mediated UV-to-visible spectral conversion for enhancement of power-conversion efficiencyChemical Communications, 2011
- Self‐Modulated White Light Outcoupling in Doped Organic Nanowire Waveguides via the Fluctuations of Singlet and Triplet Excitons During PropagationAdvanced Materials, 2011
- What Kind of “Soft Materials” Can We Design from Molecular Gels?Chemistry – An Asian Journal, 2010
- Up-Conversion Fluorescence: Noncoherent Excitation by SunlightPhysical Review Letters, 2006
- Photochemical Upconversion: Anthracene Dimerization Sensitized to Visible Light by a RuII ChromophoreAngewandte Chemie, 2006
- Upconversion and Anti-Stokes Processes with f and d Ions in SolidsChemical Reviews, 2003
- Formation cross-sections of singlet and triplet excitons in π-conjugated polymersNature, 2001
- Anisotropy of Triplet Exciton Diffusion in AnthracenePhysical Review Letters, 1969