tandem architecture - Page 8

Novaled and Kodak have developed  anew white PIN OLED, to be used in RGBW displays. The display is based on Novaled's p-type and n-type doped transprot layers and Kodak's emitter systems. The companies showed two devices - single unit and tandem-white OLEDs. 

For the single unit devices, 15.8-cd/A with a lifetime of 30,000 hours and color coordinates of 0.32/0.35 at 1,000 candelas per square meter were reached. In the tandem device approach a current efficiency of 33.2 cd/A at color coordinates 0.28/0.31 was achieved. The lifetime of the device was 77,000 hours compared to 51,000 hours that were reached with devices based on conventional Li-doping for the connector unit

In a display simulation the tandem device compares favorably with a conventional tandem device based on Li-doped p-n connectors; allowing display lifetime to be improved from 38,000 to 53,000 hours.

Back in June I interviewed Mr. Corey Hewitt and Dr. James Buntaine from Kodak OLED Systems. Now the nice guys at Kodak agreed to another interview - this one is focused on OLED for lighting, and I talked to Mr. Steven Van Slyke (R&D directory) and Dr. Yuan-Sheng Tyan, a Research Fellow. So first of all, let's introduce them properly:

Mr. Steven Van Slyke, R&D Director, Kodak OLED Systems 

Steven Van Slyke received his Bachelors degree in Chemistry from Ithaca College and Masters degree in Materials Science from Rochester Institute of Technology.  He joined Eastman Kodak Research Laboratories in 1979 where his work has centered on OLEDs. He has been active in all phases of OLED technology, from basic research on organic materials to development of manufacturing technologies for high volume OLED display production. Mr. Van Slyke is recognized as a co-inventor of small-molecule organic light emitting diodes and is a leading authority on OLED technology. He has published and presented over 40 papers and holds 36 patents in the areas of OLED materials and device architecture.

I recently had the chance to interview Mr. Corey Hewitt and Dr. James Buntaine from Kodak OLED Systems. Kodak is where OLEDs were first discovered, and they are still in the fore-front of the technology. This is going to be a long article - these guys have given me a lot of background info, even before answering my questions. But first let's introduce Corey and James:

Mr. Corey Hewitt, Operations Manager & Vice President, Kodak OLED Systems
Mr. Hewitt's responsibilities include worldwide operations, finance, marketing and business development. Corey has traveled and worked closely on a worldwide basis with Dr. Buntaine in determining the future strategy for OLED technology and how it relates to Eastman Kodak Company. Corey received his Business Administration/Finance degree from the University at Buffalo and subsequently completed his Masters of Business Administration from the Rochester Institute of Technology. Corey has joined Kodak in 1999, and held several positions before becoming the Operations Manager and VP of Kodak OLED Systems.