公开(公告)号：US20160238455A1

公开(公告)日：2016-08-18

申请号：US15045011

申请日：2016-02-16

Applicant: Massachusetts Institute of Technology

Inventor： Daniel N. Congreve ,  Nicholas John Thompson ,  Mark W.B. Wilson ,  Mengfei Wu ,  Marc A. Baldo ,  Moungi G. Bawendi ,  Vladimir Bulovic

IPC: G01J9/00 ,  C09K11/66 ,  H01L51/50

Abstract: The present invention generally relates to composition and methods for downconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the organic material and the nanocrystal. In certain embodiments, the nanocrystal has a first excited energy state with an energy less than a triplet energy 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 organic material to produce two triplet excitons. The triplet excitons may then transfer to the nanocrystal via the ligand, where they can undergo recombination, resulting in the formation low energy photons.

Abstract translation: 本发明一般涉及用于降光转换光的组合物和方法。 在一些实施方案中，组合物和方法包括能够促进有机材料和纳米晶体之间的能量转移的有机材料，纳米晶体和配体。 在某些实施方案中，纳米晶体具有能量小于有机材料的三线态能量状态的第一激发能态。 在一些实施方案中，有机材料可以是芳族的和/或包括一个或多个π-共轭碳 - 碳双键。 在一些情况下，入射光可以被有机材料吸收以产生两个三重态激子。 然后，三线态激子可以通过配体转移到纳米晶体，在那里它们可以进行复合，导致形成低能量光子。

公开(公告)号：US20160237343A1

公开(公告)日：2016-08-18

申请号：US15045028

申请日：2016-02-16

Applicant: Massachusetts Institute of Technology

Inventor： Marc A. Baldo ,  Daniel N. Congreve ,  Nicholas John Thompson ,  Mark W.B. Wilson ,  Mengfei Wu ,  Moungi G. Bawendi ,  Vladimir Bulovic

IPC: C09K11/56 ,  G01J9/00 ,  H01L51/50

CPC classification number: C09K11/562 ,  G01J1/58

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.

Abstract translation: 本发明一般涉及用于上变频光的组合物和方法。 在一些实施方案中，组合物和方法包括能够促进纳米晶体和有机材料之间的能量转移的有机材料，纳米晶体和配体。 在某些实施方案中，纳米晶体具有能量大于有机材料的三线态的第一激发能态。 在一些实施方案中，有机材料可以是芳族的和/或包括一个或多个π-共轭碳 - 碳双键。 在一些情况下，入射光可以被纳米晶体吸收以产生三线态激子。 然后，三线态激子可以从纳米晶体转移到有机材料并经历三重态三重态湮灭，形成三线态激子的能量的大约两倍的单线态。 在某些实施方案中，单线态发荧光，导致形成高能光子。