QD Vision’s quantum dot light emitting diodes (QLEDs) are an advanced technology currently in development that will deliver the ultimate solution for displays and lighting applications. An emerging, printable thin film electroluminescent device technology, QLEDs are excited electrically to generate light. At the heart of QLEDs are electroluminescent colloidal quantum dots that combine the customizable, saturated, stable color and low-voltage performance found in inorganic LEDs with the solution processability of polymers. The result -- a reliable, energy efficient, tunable color solution for displays and lighting that is less costly to manufacture and that can employ ultra-thin, transparent or flexible substrates.
While at an earlier stage of development and commercialization than QD Vision’s Color IQTM products, QLED performance is already suitable for use in certain products that require precision color solutions in an ultra-slim form factor, including monochrome visible and infrared displays, and lighting devices for machine and night vision applications. QD Vision has extensive chemistry, device and testing laboratories to assist customers in early QLED device and product development.
QD Vision is currently working with development partners to incorporate QLED technology into full-color displays and lighting devices to improve color, power efficiency, form factor and manufacturing costs for consumer electronics and solid-state lighting products. The company is working with government agencies and the military, material and display manufacturers, as well as manufacturing equipment makers to commercialize QLED technology, and offers high-quality electroluminescent-grade quantum dot materials, technology transfer and collaboration services to help its partners leap-frog the competition.
- Pure Color – Today’s printable saturated QLEDs essentially match or exceed NSTC color standards for displays without the need for color filters (see figure below). The excellent color performance of QLEDs ultimately translates into a 30-40% luminance efficiency advantage over organic light emitting diodes (OLEDs) at the same color point. Current OLED displays require lossy color filtering to achieve a similar color performance.
- Low Power Consumption – The luminous power efficiency of any LED is inversely proportional to its operating voltage. QD Vision’s recent advancements in materials and device structures have led to very low operating voltage QLEDs, exhibiting turn-on voltages at the bandgap voltage of the material. Based on our measurement and analysis, when the exceptional color purity and low voltage operation of QLEDs are factored into the overall display power efficiency, QLEDs have the potential to be more than twice as power efficient as OLEDs at the same color purity.
- Low-cost Manufacture – QD Vision is developing quantum dot printing techniques with high material utilization to realize low-cost, full-color active-matrix displays and lighting devices. The ability to print QD emitters using a simple QLED device structure, without the need for color filters or a backlight, greatly simplifies the bill of materials for a QLED display. By not requiring glass or additional optics in future solid-state lighting devices, the ability to print large-area QLEDs on ultra-thin flexible substrates will reduce luminaire manufacturing cost.
- Ulra-thin, Transparent, Flexible Form Factors – Today’s LCD displays and LED chips are fabricated on glass and crystalline substrates making them inherently expensive and fragile for mobile and large area applications. QLEDs are only a couple hundred nanometers thick making them virtually transparent and flexible, and highly suitable for integration onto plastic or metal foil substrates as well as other surfaces. These attributes will enable product designers to develop new display and lighting forms not possible with existing technologies.
The unique combination of extraordinary color, high efficiency, form factor and solution-processability makes QD Vision’s QLEDs a breakthrough electroluminescent technology for next generation electronic displays and solid-state lighting applications.