Massachusetts Institute of Technology

Kateeva, Inc.

Jianglong Chen

Vladimir Bulovic

Martin Arnold Schmidt

Conor Francis Madigan

Marc A Baldo

Steven A Van Slyke

Valerie Gassend

Inna Tregub

Ian Millard

Moungi G Bawendi

Alexander Sou-Kang Ko

Florian Pschenitzka

Elena Rogojina

Murali V Chaparala

Michelle Chan

Polina Olegovna Anikeeva

Rajsapan Jain

Eric Wing-Jing Lam

Valerie Leblanc

Valerie LeBlanc

Ink compositions for forming quantum dot-containing films are provided. Also provided are methods for forming the quantum dot-containing films via inkjet printing and photonic devices that incorporate the quantum dot-containing films as light-emitting layers. The ink compositions include the quantum dots, di(meth)acrylate monomers or a combination of di(meth)acrylate and mono(meth)acrylate monomers, and a one or more multifunctional crosslinking agents.

Display devices utilizing quantum dots and inkjet printing techniques thereof

The present teachings relate to various embodiments of an ink composition, which once printed and cured forms an organic thin film on a substrate such as, but not limited by, an OLED device substrate. Various embodiments of the ink can be printed using an industrial inkjet printing system that can be housed in a gas enclosure, which gas enclosure defines an interior that has a controlled environment maintained as an inert and substantially low-particle process environment. Patterned printing of an organic thin film on a substrate, for example, but not limited by, an OLED device substrate, in such a controlled environment can ensure a high-volume, high yield process for a variety of OLED devices.

Organic thin film ink compositions and methods

In one embodiment the disclosure relates to an apparatus for depositing an organic material on a substrate, including a source heater for heating organic particles to form suspended organic particles; a transport stream for delivering the suspended organic particles to a discharge nozzle, the discharge nozzle having a plurality of micro-pores, the micro-pores providing a conduit for passage of the suspended organic particles; and a nozzle heater for pulsatingly heating the micro-pores nozzle to discharge the suspended organic particles from the discharge nozzle.

Method and apparatus for depositing LED organic film

The disclosure relates to providing printed structures of polymer that have substantially flat printed surfaces. In one embodiment, the disclosure relates to a post-printing treatment apparatus for receiving a substrate supporting a polymer printing thereon. The polymer can be PMMA or other suitable polymer. In a related embodiment, the polymer defines a thermoplastic polymer having a glass transition temperature. The apparatus can comprise of a chamber, and input manifold, an exhaust manifold, a solvent reservoir and a gas reservoir. The solvent reservoir provides one or more solvent systems adapted to chemically bind, and potentially react, with the polymer. The gas reservoir provides one or more gases for drying the substrate and printed polymer after the solvent treatment step. In one application, a substrate having printed surface thereon is placed in the chamber and exposed to the solvent system for sufficient period of time to provide substantially flat print surfaces.

Method and apparatus for forming structures of polymer nanobeads

The present teachings provide methods for forming organic layers for an organic light-emitting device (OLED) using an inkjet printing or thermal printing process. The method can further use one or more additional processes, such as vacuum thermal evaporation (VTE), to create an OLED stack. OLED stack structures are also provided wherein at least one of the charge injection or charge transport layers is formed by an inkjet printing or thermal printing method at a high deposition rate. The structure of the organic layer can be amorphous, crystalline, porous, dense, smooth, rough, or a combination thereof, depending on deposition parameters and post-treatment conditions. An OLED microcavity is also provided and can be formed by one of more of the methods.

Materials and methods for controlling properties of organic light-emitting device

The disclosure relates to a method for depositing an organic film layer on a substrate. In one implementation a method to deposit organic film by generating vaporized organic particles; streaming a carrier fluid proximal to a source to carry the vaporized organic particles and solid organic particles from the source towards the substrate; transporting the vaporized and solid organic particles through a discharge nozzle with a plurality of micro-pore openings, placed between the source and the substrate, that permits the passage of at least a portion of the vaporized or solid organic particles through the micro-pores; depositing the vaporized organic particles and the solid organic particles that are transported through the discharge nozzle onto the substrate.

The disclosure relates to a method for depositing films on a substrate which may form part of an LED or other types of display. In one embodiment, the disclosure relates to an apparatus for depositing ink on a substrate. The apparatus includes a chamber for receiving ink; a discharge nozzle having an inlet port and an outlet port, the discharge nozzle receiving a quantity of ink from the chamber at the inlet port and dispensing the quantity of ink from the outlet port; and a dispenser for metering the quantity of ink from the chamber to the inlet port of the discharge nozzle; wherein the chamber receives ink in liquid form having a plurality of suspended particles and the quantity of ink is pulsatingly metered from the chamber to the discharge nozzle; and the discharge nozzle evaporates the carrier liquid and deposits the solid particles on the substrate.

Method and apparatus for controlling film deposition

A light emitting device includes an electroluminescent material and semiconductor nanocrystals. The semiconductor nanocrystals accept energy from the electroluminescent material and emit light.

Light emitting device including semiconductor nanocrystals

Materials and methods for organic light-emitting device microcavity

In one embodiment, the disclosure relates to providing a first gas stream carrying vaporized material and depositing the vaporized material onto a substrate by directing a plurality of gas streams containing the vaporized material to a substrate, forming an gas curtain around the streams to prevent its dissemination beyond a target print area, and allowing the vaporized material to condense on the target print area. In another embodiment, heat is used to regulate the flow of the material and the thickness of the deposited layer.

Method and apparatus for organic vapor printing

The present teachings provide methods for forming organic layers for an organic light-emitting device (OLED) using a thermal printing process. The method can further use one or more additional processes, such as vacuum thermal evaporation (VTE), to create an OLED stack. OLED stack structures are also provided wherein at least one of the charge injection or charge transport layers is formed by a thermal printing method at a high deposition rate. The organic layer can be subject to post-deposition treatment such as baking. The structure of the organic layer can be amorphous, crystalline, porous, dense, smooth, rough, or a combination thereof, depending on deposition parameters and post-treatment conditions. The organic layer can improve light out-coupling efficiency of an OLED, increase conductivity, decrease index of refraction, and/or modify the emission chromaticity of an OLED. An OLED microcavity is also provided and can be formed by one of more of these methods.

Growing community of inventors

San Jose, CA, United States of America

Jianglong Chen