Oxadiazole-integrated heterocoronene discotics as ambipolar organic semiconductors

Phosphorescent organic light-emitting device with an ambipolar oxadiazole host

In this latter, the authors demonstrated a phosphorescent organic light-emitting device OLED with a lower driving voltage and a longer operation lifetime based on 2,2 -bis 5-phenyl-21,3,4 oxadazolyl biphenyl, an oxadiazole OXD derivative, as the host of the emitting layer doped with a common green-emitting phosphorescent dopant, fac-tris 2-phenylpyridine iridium Ir ppy 3 . Rather than an electr...

Electron-withdrawing substituted tetrathiafulvalenes as ambipolar semiconductors

Tetracene dicarboxylic imide and its disulfide: synthesis of ambipolar organic semiconductors for organic photovoltaic cells.

We have designed and synthesized a new donor/acceptor-type tetracene derivative by the introduction of dicarboxylic imide and disulfide groups as electron-withdrawing and -donating units, respectively. The prepared compounds, tetracene dicarboxylic imide (TI) and its disulfide (TIDS) have high chemical and electrochemical stability as well as long-wavelength absorptions of up to 886 nm in the t...

Benzodicarbomethoxytetrathiafulvalene derivatives as soluble organic semiconductors.

A series of new tetrathiafulvalene (TTF) derivatives bearing dimethoxycarbonyl and phenyl or phthalimidyl groups fused to the TTF core (6 and 15-18) has been synthesized as potential soluble semiconductor materials for organic field-effect transistors (OFETs). The electron-withdrawing substituents lower the energy of the HOMO and LUMO levels and increase the solubility and stability of the semi...

Organic Semiconductors

History With the invention of the transistor around the middle of the last century, inorganic semiconductors such as Si or Ge began to take over the role as the dominant material in electronics from the previously dominant metals. At the same time, the replacement of vacuum tube based electronics by solid state devices initiated a development which by the end of the 20th century has lead to the...