Electron mobility and electroluminescence efficiency of blue conjugated polymers
نویسندگان
چکیده
Electron mobility and electroluminescence efficiency of blue conjugated polymers Chia-Ming Yang a, Hua-Hsien Liao a, Sheng-Fu Horng a, Hsin-Fei Meng b,∗, Shin-Rong Tseng b, Chain-Shu Hsu c a Department of Electric Engineering, National Tsing Hua University, Hsinchu 300, Taiwan, Republic of China b Institute of Physics, National Chiao Tung University, Hsinchu 300, Taiwan, Republic of China c Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan, Republic of China
منابع مشابه
Transient electroluminescence of polymer light emitting diodes using electrical pulses
Detailed experimental and theoretical analysis of the pulsed excitation of polymer light emitting diodes is presented. We find a set of universal transient features for a variety of device configurations ~different polymers/cathodes! which can be reproduced using our phenomenological numerical model. We find that the temporal evolution of the electroluminescence in response to a step voltage pu...
متن کاملElectroluminescence in organic light emitting diodes
Principle of electroluminescence The light emission in the presented OLED is based on the formation of electron-hole-pairs within conjugated polymers with semiconducting properties. Therefore a suitable polymer like PPV (fig. 1) has to be placed between a transparent anode and a metallic cathode (fig. 2). By application of an electric voltage electrons (on the cathode side) and holes (on the an...
متن کاملEnhancement of singlet exciton formation ratio in electroluminescent conjugated polymers by magnetic doping
The singlet to triplet exciton formation ratio in electron-hole recombination is predicted theoretically to be higher than 1/3 for conjugated polymers doped with magnetic transition-metal complexes. The intersystem crossing rate between the nearly degenerate second lowest triplet and singlet excitons is increased by the exchange coupling between the p electrons in conjugated polymers and the ma...
متن کاملTheory of imbalanced electron-hole transport in conjugated polymers
Electron-hole symmetry in conjugated polymers is found to exist in not only the band structure but also the defect levels caused by structure disorder. The commonly observed higher hole mobility is explained by (1) the compensation of the hole traps by the unintentional background p doping; and (2) the electron traps caused by oxidation. Higher electron mobility in N and O containing conjugated...
متن کاملSTM-electroluminescence probes of metallic and polymeric materials
The STM-electroluminescence technique is shown to be a valuable tool for characterizing optoelectronic properties and understanding structure-function relationships in heterogeneous or disordered materials on nanometer length scales. The intensity of photon emission induced by tunneling electrons from rough Au films is found to depend on the surface feature size. This size-dependent photon emis...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008