Scientists develop an organic semiconductor combining excellent charge transport with efficient solid state emission
Multifunctional organic semiconductors are highly demanded for the development of integrated optoelectronic devices, which is regarded as a gateway for a variety of applications. Particularly, organic light-emitting transistors (OLETs), embodying the smallest possible integration of organic light emitting diodes (OLEDs) and field-effect transistors (OFETs), tremendously simplify the structure of active matrix displays. Though considerable efforts have been devoted to the design and synthesis of such kind materials, until now, very few molecular systems can compromise charge transporting and solid state emission.
Recently, Professor DONG Huanli and coworkers from Institute of Chemistry, Chinese Academy of Sciences and Professor HU Wenping from Tianjin University develop a strategy via aromatic extension at 2,6- positions of anthracene to achieve 2,6-di(2-naphthyl)anthracene (dNaAnt). Measurement demonstrate that dNaAnt single crystals combine the high mobility of 12.3 cm2V-1s-1 and strong photoluminescence quantum yield (PLQY) of 29.2%. Furthermore, OLETs based on dNaAnt single crystals were constructed, distributing outstanding balanced ambipolar charge transporting property (μh = 1.10 cm2V-1s-1, μe = 0.87 cm2V-1s-1) and spatially controllable emission.
These results make dNaAnt an excellent candidate for integrated optoelectronic applications and prove that aromatic extension at 2,6- positions of anthracene is an elegant strategy toward the combination of excellent charge transporting and efficient solid state emission.
Their work entitled “Aromatic extension at 2,6- positions of anthracene towards an ele-gant strategy for organic semiconductors with efficient charge transport and strong solid state emission” has been published in J. Am. Chem. Soc., and selected as cover paper.
Electrical and light-emitting properties of 2,6-di(2-naphthyl)anthracene (dNaAnt). (Image by Prof.DONG Huanli and Prof. HU Wenping)
Prof. DONG Huanli
Institute of Chemistry, Chinese Academy of Sciences