Dalen E. Keys

Photopolymers for holography

Photosensitive films composed of dye, initiator, acrylic monomers, and polymeric film-forming binder, and their use in recording volume phase transmission and reflection holograms are described. Systematic variation of monomer-binder combinations reveals that the maximum attainable index modulation (hologram efficiency) increases with increasing difference between the refractive indices of monomer and binder. Addition of plasticizer is also useful for increasing index modulation. Thermal and wet chemical processing methods for altering hologram properties are described.

Holographic notch filters

Holographic notch filters (HNF) are replacing dielectric filters in certain optical systems that incorporate single line laser sources. HNF characteristics, physical structure, specification, benefits, and customer acceptance are described for laser spectroscopy and laser surgery applications.

16.4: A 14.1″ WXGA Solution Processed OLED Display with a‐Si TFT

We have developed the worlds largest a-Si TFT based solution processed AMOLED full color display. In our 14.1″ WXGA demonstrator, we have realized the worlds best performance for solution-processed OLED materials in an active matrix display, while setting a higher standard for uniformity and image quality.

Low-Voltage Organic Thin-Film Transistors with Improved Stability and Large Transconductance

Pentacene is among the most popular organic semiconductors for organic thin-film transistors (TFTs), due to its relatively large carrier mobility. However, the stability of pentacene TFTs under continuous dynamic operation may be insufficient for future applications. Here we compare the static and dynamic performance and the operational stability of low-voltage organic TFTs based on pentacene and a recently synthesized organic semiconductor, di(phenylvinyl)anthracene (DPVAnt).