Efficiency roll‐off in organic light‐emitting diodes

C Murawski, K Leo, MC Gather - Advanced Materials, 2013 - Wiley Online Library
Organic light‐emitting diodes (OLEDs) have attracted much attention in research and
industry thanks to their capability to emit light with high efficiency and to deliver high‐quality …

Band structure engineering in organic semiconductors

M Schwarze, W Tress, B Beyer, F Gao, R Scholz… - Science, 2016 - science.org
A key breakthrough in modern electronics was the introduction of band structure
engineering, the design of almost arbitrary electronic potential structures by alloying different …

Efficiency and rate of spontaneous emission in organic electroluminescent devices

M Furno, R Meerheim, S Hofmann, B Lüssem… - Physical Review B …, 2012 - APS
We examine spontaneous emission in organic electroluminescent devices and investigate
the influence of the local photonic mode density on the emissive properties of molecular …

Fermi level shift and do** efficiency in -doped small molecule organic semiconductors: A photoelectron spectroscopy and theoretical study

ML Tietze, L Burtone, M Riede, B Lüssem, K Leo - Physical Review B …, 2012 - APS
We study the mechanism of molecular do** of the organic small molecule N, N, N′, N′-
tetrakis (4-methoxyphenyl)-benzidine (MeO-TPD) doped with the fluorinated fullerene C 60 …

Molecular-scale simulation of electroluminescence in a multilayer white organic light-emitting diode

M Mesta, M Carvelli, RJ De Vries, H Van Eersel… - Nature materials, 2013 - nature.com
In multilayer white organic light-emitting diodes the electronic processes in the various
layers—injection and motion of charges as well as generation, diffusion and radiative decay …

Kinetic Monte Carlo study of the sensitivity of OLED efficiency and lifetime to materials parameters

R Coehoorn, H Van Eersel, P Bobbert… - Advanced Functional …, 2015 - Wiley Online Library
The performance of organic light‐emitting diodes (OLEDs) is determined by a complex
interplay of the optoelectronic processes in the active layer stack. In order to enable …

Open‐circuit voltage and effective gap of organic solar cells

J Widmer, M Tietze, K Leo… - Advanced Functional …, 2013 - Wiley Online Library
The open‐circuit voltage (VOC) of an organic solar cell is limited by the donor‐acceptor
material system. The effective gap Egeff between the electron affinity of the acceptor and the …

Investigating the Role of Emissive Layer Architecture on the Exciton Recombination Zone in Organic Light‐Emitting Devices

NC Erickson, RJ Holmes - Advanced Functional Materials, 2013 - Wiley Online Library
An experimental approach to determine the spatial extent and location of the exciton
recombination zone in an organic light‐emitting device (OLED) is demonstrated. This …

Pentacene Schottky diodes studied by impedance spectroscopy: Do** properties and trap response

P Pahner, H Kleemann, L Burtone, ML Tietze… - Physical Review B …, 2013 - APS
We study do** properties and charge carrier trap distributions in pentacene Schottky
diodes doped by the fluorinated fullerene derivate C 60 F 36 and 2, 2'-(perdiylidene) …

Alternative p-doped hole transport material for low operating voltage and high efficiency organic light-emitting diodes

C Murawski, C Fuchs, S Hofmann, K Leo… - Applied Physics …, 2014 - pubs.aip.org
We investigate the properties of N, N′-[(Diphenyl-N, N′-bis) 9, 9,-dimethyl-fluoren-2-yl]-
benzidine (BF-DPB) as hole transport material (HTL) in organic light-emitting diodes …