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Novel Aromatic Amines for Photoconductor and Organic Electronic Applications

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Aromatic amines are frequently used as hole conductors in copiers and laser printers. In the last decade there has been increasing interest to extend the use of aromatic amines to organic light emitting diodes (OLEDs) as well as to organic field-effect transistors (OFETs) developed for printable organic electronics. In this contribution star-shaped aromatic amines which form stable amorphous phases are introduced. Such materials are often called molecular glasses. We have used molecular glasses with triphenylamine, triphenylbenzene and fluorene units as blue emitters and hole blocking materials in OLEDs. The layer thickness of the hole transport and emission layer and the hole blocking layer were optimized in a combinatorial approach which leads to pure blue emitting OLEDs with color coordinates of x=0.15 / y=0.15, a brightness of 400 cd/m2 and an efficiency of 2 cd/A. We have also used molecular glasses with triphenylamine and carbazole units as organic semiconductors in OFETs and obtained environmentally stable transistors with mobilities up to 10−4 cm2/Vs.
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Document Type: Research Article

Publication date: 2006-01-01

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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