Air Stable, Amorphous Organic Films and their Applications to Solution Processable Flexible Electronics

Abstract

The rapidly expanding field of organic semiconductors for display and low-cost electronics applications requires materials, which not only have high mobility but also benefit from solution processability and environmental stability. In this paper we present a new class of solution coatable organic materials with excellent stability to air and light. Spin-coated FET devices operate at ambient conditions without encapsulation and show p-type field-effect mobilities of 2 x 10^-3 cm²V^-1s^-1 and on/off ratios greater than 10⁴. Thin films can be deposited from common organic solvents onto a variety of substrates. These films are mechanically robust and can withstand temperatures in excess of 100 °C without significant changes in electrical performance. FET switching and transient characteristics at higher frequencies are also discussed. These types of materials should find applications in many areas of flexible electronics.