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Title: Methods and compositions for the upconversion of light

Abstract

The present invention generally relates to composition and methods for upconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the nanocrystal and the organic material. In certain embodiments, the nanocrystal has a first excited energy state with an energy greater than a triplet state of the organic material. The organic material, in some embodiments, may be aromatic and/or include one or more pi-conjugated carbon-carbon double bonds. In some cases, incident light may be absorbed by the nanocrystal to produce triplet excitons. The triplet excitons may then transfer from the nanocrystal to the organic material and undergo triplet-triplet annihilation, creating a singlet state of approximately twice the energy of the triplet exciton. In certain embodiments, the singlet state fluoresces, resulting in the formation of a high energy photon.

Inventors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Massachusetts Institute of Technology, Cambridge, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1435786
Patent Number(s):
9,944,847
Application Number:
15/045,028
Assignee:
Massachusetts Institute of Technology (Cambridge, MA) EFRC
DOE Contract Number:  
SC0001088
Resource Type:
Patent
Resource Relation:
Patent File Date: 2016 Feb 16
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Baldo, Marc A., Congreve, Daniel N., Thompson, Nicholas John, Wilson, Mark W.B., Wu, Mengfei, Bawendi, Moungi G., and Bulovic, Vladimir. Methods and compositions for the upconversion of light. United States: N. p., 2018. Web.
Baldo, Marc A., Congreve, Daniel N., Thompson, Nicholas John, Wilson, Mark W.B., Wu, Mengfei, Bawendi, Moungi G., & Bulovic, Vladimir. Methods and compositions for the upconversion of light. United States.
Baldo, Marc A., Congreve, Daniel N., Thompson, Nicholas John, Wilson, Mark W.B., Wu, Mengfei, Bawendi, Moungi G., and Bulovic, Vladimir. Tue . "Methods and compositions for the upconversion of light". United States. https://www.osti.gov/servlets/purl/1435786.
@article{osti_1435786,
title = {Methods and compositions for the upconversion of light},
author = {Baldo, Marc A. and Congreve, Daniel N. and Thompson, Nicholas John and Wilson, Mark W.B. and Wu, Mengfei and Bawendi, Moungi G. and Bulovic, Vladimir},
abstractNote = {The present invention generally relates to composition and methods for upconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the nanocrystal and the organic material. In certain embodiments, the nanocrystal has a first excited energy state with an energy greater than a triplet state of the organic material. The organic material, in some embodiments, may be aromatic and/or include one or more pi-conjugated carbon-carbon double bonds. In some cases, incident light may be absorbed by the nanocrystal to produce triplet excitons. The triplet excitons may then transfer from the nanocrystal to the organic material and undergo triplet-triplet annihilation, creating a singlet state of approximately twice the energy of the triplet exciton. In certain embodiments, the singlet state fluoresces, resulting in the formation of a high energy photon.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 17 00:00:00 EDT 2018},
month = {Tue Apr 17 00:00:00 EDT 2018}
}

Patent:

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