TY - JOUR
T1 - Highly Efficient Photon Upconversion in Self-Assembled Light-Harvesting Molecular Systems
AU - Ogawa, Taku
AU - Yanai, Nobuhiro
AU - Monguzzi, Angelo
AU - Kimizuka, Nobuo
N1 - Funding Information:
This work was partially supported by a Grants-in-Aid for Scientific Research (S) (25220805), a Grants-in-Aid for Young Scientists (B) (26810036), a Grant-in-Aid for Scientific Research on Innovative Area (26104529) from the Ministry of Education, Culture Sports, Science and Technology of Japan, the JSPS-NSF International Collaborations in Chemistry (ICC) program, and a research grant from The Noguchi Institute. A.M. acknowledges JSPS postdoctoral fellowships for foreign researchers.
Publisher Copyright:
© 2015, Nature Publishing Group. All rights reserved.
PY - 2015/6/9
Y1 - 2015/6/9
N2 - 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.
AB - 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.
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U2 - 10.1038/srep10882
DO - 10.1038/srep10882
M3 - Article
AN - SCOPUS:84931275700
SN - 2045-2322
VL - 5
JO - Scientific reports
JF - Scientific reports
M1 - 10882
ER -
