TY - BOOK ID - 8061173 TI - Device architecture and materials for organic light-emitting devices : targeting high current densities and control of the triplet concentration PY - 2011 SN - 9400794037 9400716079 9400716087 PB - Dordrecht, The Netherlands : Springer, DB - UniCat KW - Electroluminescent devices. KW - Electronic technology. KW - Organic electronics. KW - Electroluminescent devices KW - Organic electronics KW - Electrical & Computer Engineering KW - Physics KW - Engineering & Applied Sciences KW - Physical Sciences & Mathematics KW - Electrical Engineering KW - Atomic Physics KW - Field-effect transistors. KW - Light emitting diodes. KW - Organic conductors. KW - Conductors, Organic KW - Molecular metals KW - Organic metals KW - Polymer metals KW - LEDs (Light emitting diodes) KW - Unipolar transistors KW - Physics. KW - Organic chemistry. KW - Solid state physics. KW - Electronic circuits. KW - Optical materials. KW - Electronic materials. KW - Solid State Physics. KW - Circuits and Systems. KW - Optics, Lasers, Photonics, Optical Devices. KW - Optical and Electronic Materials. KW - Organic Chemistry. KW - One-dimensional conductors KW - Organometallic compounds KW - Conducting polymers KW - Diodes, Semiconductor KW - LED lamps KW - Light-emitting electrochemical cells KW - Transistors KW - Systems engineering. KW - Chemistry, Organic. KW - Organic chemistry KW - Chemistry KW - Optics KW - Materials KW - Engineering systems KW - System engineering KW - Engineering KW - Industrial engineering KW - System analysis KW - Design and construction KW - Lasers. KW - Photonics. KW - Electronic materials KW - New optics KW - Light amplification by stimulated emission of radiation KW - Masers, Optical KW - Optical masers KW - Light amplifiers KW - Light sources KW - Optoelectronic devices KW - Nonlinear optics KW - Optical parametric oscillators KW - Electron-tube circuits KW - Electric circuits KW - Electron tubes KW - Electronics KW - Solids UR - https://www.unicat.be/uniCat?func=search&query=sysid:8061173 AB - Device Architecture and Materials for Organic Light-Emitting Devices focuses on the design of new device and material concepts for organic light-emitting devices, thereby targeting high current densities and an improved control of the triplet concentration. A new light-emitting device architecture, the OLED with field-effect electron transport, is demonstrated. This device is a hybrid between a diode and a field-effect transistor. Compared to conventional OLEDs, the metallic cathode is displaced by one to several micrometers from the light-emitting zone, reducing optical absorption losses. The electrons injected by the cathode accumulate at an organic heterojunction and are transported to the light-emission zone by field-effect. High mobilities for charge carriers are achieved in this way, enabling a high current density and a reduced number of charge carriers in the device. Pulsed excitation experiments show that pulses down to 1 µs can be applied to this structure without affecting the light intensity, suggesting that pulsed excitation might be useful to reduce the accumulation of triplets in the device. The combination of all these properties makes the OLED with field-effect electron transport particularly interesting for waveguide devices and future electrically pumped lasers. In addition, triplet-emitter doped organic materials, as well as the use of triplet scavengers in conjugated polymers are investigated. ER -