Massachusetts Institute of Technology

Jonathan E Halpert

Moungi G Bawendi

Vladimir Bulovic

Seth A Coe-Sullivan

Jonathan S Steckel

Jean-Michel Caruge

Alexi Arango

Jonathan R Tischler

Polina Olegovna Anikeeva

Vanessa Wood

Matthew J Panzer

Jean-Michel Caruce

Jonathan Tischler

A composition can include a first moiety capable of being excited to an excited state, and a second moiety capable of accepting excited state energy from the first moiety. The second moiety is capable of emitting light with a FWHM of 15 nm or less when excited. The second moiety can be a J-aggregate and the first moiety can be a semiconductor nanocrystal.

Light emitting material

A light emitting device includes a semiconductor nanocrystal and a charge transporting layer that includes an inorganic material. The charge transporting layer can be a hole or electron transporting layer. The inorganic material can be an inorganic semiconductor.

Light emitting device including semiconductor nanocrystals

A voltage driven light emitting device includes an electroluminescent material and semiconductor nanocrystals, luminescent organic small molecules, mixtures of emissive species molecules, or conductive polymers. The semiconductor nanocrystals, luminescent organic small molecules, mixtures of emissive species molecules, or conductive polymers emit light. The semiconductor nanocrystals, luminescent organic small molecules, mixtures of emissive species molecules, or conductive polymers can be doped to provide desired emission characteristics. Devices that share a substrate and emit more than one color may be conveniently made.

A blue light emitting semiconductor nanocrystal having an quantum yield of greater than 20% can be incorporated in a light emitting device.

Blue light emitting semiconductor nanocrystals and devices

A white light emitting semiconductor nanocrystal includes a plurality of semiconductor nanocrystals.

White light emitting devices

A light emitting device including semiconductor nanocrystals can have a unipolar construction. The semiconductor nanocrystals emit light during device operation. The size and chemical composition of the semiconductor nanocrystals can be chosen to provide desired emission characteristics. Devices that share a substrate and emit more than one color may be conveniently made.

Light emitting devices including semiconductor nanocrystals

A semiconductor nanocrystal can have a barbell shape. The nanocrystal can include two semiconductor materials selected so that upon excitation, one charge carrier is substantially confined to the one semiconductor material and the other charge carrier is substantially confined to the other semiconductor material.

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Jonathan E Halpert