Comparison of the electroluminescence of a red fluorescent dye doped into the Alq3 and Alq3:rubrene mixed host

Electroluminescence of organic light-emitting diodes with an ultra-thin layer of dopant

“…These results suggested that the contribution of DCJTB to EL spectrum of device is bigger in the doped device than in the undoped device. Considering that DCJTB concentration is higher in the undoped device, the smaller contribution of DCJTB obviously originates from concentration quench effect (CQE) of DCJTB, which is a common sense in dye-doped device as widely reported in literatures [9,10]: as concentration of the fluorescent dye increases, excitons concentration of the dye also increases. As a result a stronger interaction between excitons will appear, leading to more excitons deactivate nonradiatively or, in other words, more serious exciton-exciton quenching.…”

Prediction of emission spectra of fluorescence materials using principal component analysis

“…The fluorescence typically occurs by aromatic molecules and emission spectra of fluorescent materials are depending on their chemical structure. 1,2 Over the recent years, development of fluorescent molecules have been progressing remarkably due to their potential applications in the field of optoelectronic devices, such as electroluminescence devices, 3 bio-sensing fluorescence technology, 4 and organic light emitting devices (OLED). 5 Because of unlike excitation and emission characteristics, the match prediction of these material are difficult.…”

Spectral studies of thin films based on poly(N-vinylcarzole) and red dopant

“…Recently, doping of organic lightemitting layers with fluorescent or phosphorescent dyes has become a promising method. Some groups have also used such doping schemes to study the doping effects in various material systems [9][10][11]. In these doped systems, the luminescence from a guest dopant molecule would result from either energy transfer of an exciton formed in the host to the guest molecule or sequential trapping of a hole and an electron by the guest molecule.…”