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Quantum Dot LEDs that Enable Heads-Up Display of Transparent Images on Car Windshields

IP Title

Transparent Quantum Dot Light-Emitting Diodes with Oxide/Metal/Oxide Electrode

Detailed Technology Description

None

Application Date

Feb 27, 2015

Application No.

9,419,174

Others

*Abstract

Advanced Triple-Layer Electrode Broadens Applications for Quantum Dot LEDs

These transparent electrodes on quantum dot light-emitting diodes (QD-LEDs) allow heads-up displays on surfaces such as car windshields. QD-LEDs have shown distinct, desirable characteristics for the next generation flat panel displays and solid-state lighting applications. By using a transparent oxide-based contact, available QD displays offer purer color, better brightness, higher efficiency, and more stability than their organic counterparts, OLED displays. University of Florida researchers have used three layers – a metal layer sandwiched between two oxide layers – to enable the use of QD-LEDs in the manufacture of transparent heads-up display for car windshields, aircraft and other surfaces, a sizeable market estimated to grow to $8.36 billion by 2020. A simple manufacturing process makes these QD-LEDs, already more stable and compatible, more cost-effective as well.

Application

Transparent QD-LEDs for heads-up display in cars and aircraft

Advantages

• Simple process reduces manufacturing costs, making these QD-LEDs cost-effective
• Oxide/metal/oxide layers increase stability, combatibility, and tunability of quantum dots, heightening reliability and extending life of flat panel displays
• Transparent displays offer visibility from both sides, important for active matrix displays

Technology

These transparent QD-LEDs have superior transmittance and can be integrated with transparent display systems because of the high optical transparency of the thin QDs and carrier transport layers. Incorporated into this design is an electrode composed of a layer of oxide, a layer of thin metal, and an additional layer of oxide. In this oxide/metal/oxide electrode, the inner oxide layer serves as a charge transport layer, as the thin metal layer (5nm-20nm) acts as an anode/cathode. The outer oxide layer covering the thin metal layer helps to reduce reflectance. Adjustments to the structure and composition of the oxide/metal/oxide electrode can manipulate the level of transmittance and the transmissive wavelength, offering flexibility in design and use of the display.

*IP Issue Date

Aug 16, 2016

*IP Publication Date

Aug 13, 2015

*Principal Investigator

Name: Paul Holloway

Department:

Name: Jiangeng Xue

Department:

Name: Weiran Cao

Department:

Name: Ying Zheng

Department:

Country/Region

USA