Organic Light - Emitting Diodes and Methods for Assembly and Enhanced Charge Injection

Tobin Marks (Inventor)

Research output: Patent

Abstract

Controlling Charge Injection in OLEDs by Tuning Interfacial Properties of the Anode Hole Transport Layer NU 2004-013 Inventors Qinglan Huang Tobin J. Marks* Short Description Novel series of probe molecules designed to form robust, self-assembled monolayers at the interfacial regions of the anode hole transport layer #materials #electronic #devices #fabrication Abstract Organic emitting light diodes (OLEDs) have disrupted the display market because of their amenability to large-scale production, efficiency and broad color range. However, to further improve performance materials scientists have been investigating nanoscale interfacial phenomena that take place between the layers of materials used in OLED fabrication. Northwestern University scientists have developed a way to improve efficiency and brightness of OLEDs by incorporating a new material into the anode hole transport layer. The series of molecules they invented is based on chlorosilane and can form self-assembled monolayers (SAMs) that coat the indium tin oxide anode for the purpose of modulating charge injection. Therefore, the flow of electrons and holes during operation of OLEDs can be tuned by coating the anode with SAMs so that the brightness of emitted light is increased, while power consumption is decreased. Once these advantageous properties are conferred to OLEDs, their implementation into future display technologies will be fast-tracked. Applications o OLEDs o Flexible displays (smart paintings and fabrics, electronic paper) Advantages o Improved brightness (10-fold increase) and durability o Enhanced efficiency Publications Huang Q, Evmenenko G, Dutta P, Marks TJ. Molecularly "Engineered" Anode Adsorbates for Probing OLED Interfacial Structure¬- Charge Injection/Luminance Relationships: Large, Structure-Dependent Effects (2003). J. Am. Chem. Soc. 125: 14704-14705. IP Status Issued US patent number 7,750,175. Marketing Contact Allan Nader, PhD Invention Manager (e) a-nader@northwestern.edu (p) 847.491.4456
Original languageEnglish
Patent number7750175
StatePublished - Jul 6 2010

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