Margaret Jones Helber

19.2: Color Filter Formulations for Full-Color OLED Displays: High Color Gamut Plus Improved Efficiency and Lifetime

This paper describes Eastman Kodak Companys new color filter formulations for use in White OLED displays. The new filters deliver a substantially higher color gamut compared with commercially available LCD filters at nominal thickness, and substantially higher efficiency and lifetimes, when compared with thickened versions of the same LCD filters..

System design for a wide‐color‐gamut TV‐sized AMOLED display

Abstract— By using current technology, it is possible to design and fabricate performance-competitive TV-sized AMOLED displays. In this paper, the system design considerations are described that lead to the selection of the device architecture (including a stacked white OLED-emitting unit), the backplane technology [an amorphous Si (a-Si) backplane with compensation for TFT degradation], and module design (for long life and low cost). The resulting AMOLED displays will meet performance and lifetime requirements, and will be manufacturing cost-competitive for TV applications. A high-performance 14-in. AMOLED display was fabricated by using an in-line OLED deposition machine to demonstrate some of these approaches. The chosen OLED technologies are scalable to larger glass substrate sizes compatible with existing a-Si backplane fabs.

23.3: Distinguished Paper: High‐Efficiency Tandem Blue OLEDs

Tandem blue OLEDs using different fluorescent dopants have achieved 20 cd/A (CIEx,y = 0.14, 0.18) and 38 cd/A (CIEx,y = 0.15, 0.42) with external quantum efficiencies higher than 11%. The tandem blue OLEDs include two electroluminescent units that are connected in series with an organic intermediate connector. At an initial brightness of 1,000 cd/m2, the drive voltage of the devices can be less than 6.5 V, and the operational lifetime (T 50) of the devices is estimated to be greater than 10,000 h. We also demonstrate that the selection of electron-transporting material and an intermediate connector have significant impact on the electroluminescence performance of the tandem blue OLEDs.

P-147: Highly Efficient and Stable Blue OLED Systems

This paper will discuss combinations of a new blue dopant and a new blue host that produce superior luminance and efficiency for blue OLED devices. Furthermore, this blue system provides excellent operational stability that enables superior performance in both monochrome and full-color displays. Devices exhibiting this outstanding performance are simple in architecture, robust with respect to dopant concentration, and require no co-doping to achieve optimal performance.

P-169: Efficient, Long-Lifetime OLED Host and Dopant Formulations for Full-Color Displays

We report developments in materials and formulations for blue, green, and red fluorescent OLEDs that provide lifetimes exceeding 15,000 h for a model display operating at 200 cd/m2 with a polarizer. In addition, we describe improvements in electron transport and injection that result in a reduction in display power consumption of up to 55%.

Advanced materials and formulations for OLED display manufacturing

This paper describes Eastman Kodak Companys commercialization efforts to develop new materials and formulations for monochrome and full-color displays. We have found a new set of materials, and combinations thereof, that improve luminance efficiency, lower drive voltage, and increase the operational stability of OLED devices. We report the developments in formulations for blue and white OLEDs based on fluorescent dopants that provide lifetimes exceeding 10,000 hours for blue, and 50,000 hours for white OLEDs at a starting luminance level of 1000 cd/m2. A red formulation, based on a fluorescent dopant using a new host, is shown to give a record luminance efficiency of 7.8 cd/A combined with excellent color and lifetime. We have found a phosphorescent red-emitting device using a novel host material that gives an excellent efficiency of 9.6 lm/W. Further progress has been made in a new electron-transport layer to reduce display drive voltage, and thus reduce power consumption, while simultaneously increasing operational stability. We have compared this performance with currently available systems.

30.4: Deep‐Blue OLEDs with Exceptional Device Lifetime

A novel class of group 13 electron-transporting materials and a strategic device architectural approach were used to advance the power efficiency and lifetime of deep-blue OLED devices. The advanced efficiency and exceptional device lifetime of these devices were enabled by material advancements. These advancements shed light on a possible mechanism linked to improved device lifetime.