Results 221 to 230 of about 15,515 (260)

Degradation mechanisms in organic light emitting diodes

Synthetic Metals, 2000
Lifetime measurement results on organic light emitting diodes (OLEDs) are presented and analyzed. The drive voltage tends to increase and the luminance tends to decrease with operating time. Upon the reversal of the polarity of the external field, the voltage trends are reversed almost completely and the luminance trends undergo weak changes.
Shen, Jun, Wang, D., Langlois, E., Barrow, William A., Green, Patrick J., Tang, Ching Wan, Shi, Jianmin   +6 more
openaire   +2 more sources

Organic Light Emitting Diodes

2012
Introduction, Luiz Pereira The Organic Light Emitting Devices: The basics, Luiz Pereira Measuring the Optical and Electrical Properties of OLEDs, Luiz Pereira Rare Earth Complexes: The Search for Quasi-Monochromatic OLEDs, Luiz Pereira Transition Metal Complexes: The Path to High Brightness OLEDs, Luiz Pereira Synthesis of Light emitting Complexes ...
openaire   +1 more source

Blue light emitting naphthalimides for organic light emitting diodes

AIP Conference Proceedings, 2013
The photophysical, electrochemical, surface morphology and thermal properties of two novel blue lightemitting materials were studied. Results indicate that the molecules offer potential as non-doping light-emitting materials with good electron injection capabilities for fabrication of blue organic light-emitting diodes.
Hidayath Ulla, B. Garudachar, M. N. Satyanarayan, G. Umesh, A. M. Isloor   +4 more
openaire   +1 more source

Organic light emitting diodes.

2004
A method of fabricating an OLED element or display having two or more OLED layers is described entailing providing a blocking layer by printing with an ink in a desired pattern between two of the OLED layers, whereby, in use, conduction across the OLED element or display is reduced in the area of the pattern, wherein the ink is colored to increase ...
openaire   +3 more sources

A Thermally Stable Organic Light-Emitting Diode

1995
The design of organic electroluminescence (EL) devices meets several barriers, thermal stability and injection ability of charge carriers from the electrodes being important examples. In spite of considerable efforts to surmount them,1 they still create serious problems and require more experimental data and profounded knowledge on the device operation.
Di Marco P, Kalinowski J, Camaioni N, Fattori V, Giro G   +4 more
openaire   +2 more sources

Photochemistry of Organic Light-Emitting Diodes

AIP Conference Proceedings, 2007
The optical properties and excited‐state geometries of some organic light‐emitting diodes have been investigated by the SAC‐CI method. The absorption and emission spectra have been predicted in high accuracy and the chain‐length dependence of transition energies has been precisely reproduced.
Masahiro Ehara, Hiroshi Nakatsuji, Theodore E. Simos, George Maroulis   +3 more
openaire   +1 more source

Models of organic light-emitting diodes

Synthetic Metals, 1997
Abstract Based upon the recognition that bimolecular charge recombination in random organic systems is in accord with the Langevin formalism, a simple model has been developed to treat the recombination of charge carriers in light-emitting diodes (LEDs).
H. Bässler, Y.H. Tak, D.V. Khramtchenkov, V.R. Nikitenko   +3 more
openaire   +1 more source

Organic Light-emitting Diodes

2014
Organic light-emitting diodes (OLEDs) are another type of LED and have a more recent history, with origins in the 1950s. The demand for cheap, compact and low-power consuming light sources for displays in the increasing range of consumer products and electronic devices helps to drive research and development in light-emitting diodes, quantum dots and ...
openaire   +1 more source

Light Emitting Efficiencies in Organic Light Emitting Diodes (OLEDs)

2001
The interface between the organic layer and metallic anode of an OLED is crucial to the stability and the performance of the device. The α-septithiophene (α-7T) has been used as the buffer layer at the interface between the ITO electrode and the hole transport layer (HTL).
S.T. Lim, J.H. Moon, J.I. Won, M.S. Kwon, D.M. Shin   +4 more
openaire   +1 more source

A Lasing Organic Light‐Emitting Diode

Advanced Materials, 2010
Bodo H, Wallikewitz, Matthias, de la Rosa, Jonas H-W M, Kremer, Dirk, Hertel, Klaus, Meerholz   +4 more
openaire   +2 more sources