Dresden 2006 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
CPP: Chemische Physik und Polymerphysik
CPP 19: SYMPOSIUM Functional Organic Thin Films I
CPP 19.7: Talk
Thursday, March 30, 2006, 11:45–12:00, ZEU Lich
Full-Color Polymer OLED Displays and White Solid-State-Lighting Devices Fabricated by Direct Lithography — •Anne Köhnen1, Malte Gather1, Klaus Meerholz1, Aurélie Falcou2, and Heinrich Becker2 — 1Institut für Physikalische Chemie, Luxemburgerstr. 116, Köln 50939, Germany — 2Merck OLED Materials GmbH, Industrial Park Höchst, F 821, 65926 Frankfurt/Main, Germany
We report on a full color passive matrix display fabricated by a three step direct photo-lithography process. The device consists of parallel stripes of red, green and blue emitting conjugated polymers which are sandwiched between a transparent anode and a metal cathode in passive matrix geometry. The photo-activated oxetane-based crosslinking reaction which was used to pattern the emissive layers had no negative effect on the device performance. Each pixel in the final device can be addressed separately and covers an area of 0.3 mm2. Pictures and animations were readily displayed on the panel using a commercially available passive matrix driver.
The color coordinates of the red (0.68,0.32), green (0.29,0.59) and blue (0.17,0.20) emitting polymers are well saturated and in good agreement with the PAL color standard for display applications. Colors within this triangle were accessible by adjusting the intensity of the primaries.
Due to the high efficiency of the device we also discuss application of the display as a solid-state white-light or mood-light source. The emission profile can be accurately adjusted to coincide with the white point or with any other color. At a brightness of 400 Cd/m2 the power efficacy for white light (CIE=0.33,0.33) reaches 2.5 lum/W.