Chien-Wei Chen

Bio: Chien-Wei Chen is an academic researcher from National Taiwan University. The author has contributed to research in topics: OLED & Carbazole. The author has an hindex of 1, co-authored 1 publications receiving 26 citations.

Synthesis of New Fluorene-Indolocarbazole Alternating Copolymers for Light-Emitting Diodes and Field Effect Transistors

Abstract: New alternating copolymers of poly(2,7-(9,9′-dihexylfluorene)-alt-3,9-(5,11-di(2-ethylhexyl)-indolo[3,2-b]carbazole)) (PF-p-In) and poly(2,7-(9,9′-dihexylfluorene)-alt-2,8-(5,11-di(2-ethylhexyl)-indolo[3,2-b]carbazole)) (PF-m-In) were synthesized by palladium-catalyzed Suzuki coupling polymerization and characterized for the applications of light-emitting diodes and field effect transistors (FET). The incorporation of indolocarbazole into polyfluorene could not only enhance hole transporting properties but also thermal properties. The para-linkage, PF-p-In, facilitates π-electron delocalization and thus has a lower optical band gap and a higher emission maximum than those of the meta linkage, PF-m-In. The electroluminescence devices based on PF-p-In and PF-m-In as the emissive layer show a similar maximum luminance but with different emissive colors of green and blue, respectively. The FET hole mobilities of PF-p-In and PF-m-In are 6.73×10−5 and 1.50×10−4 cm2/V·s, respectively, which are significantly higher than that of polyfluorene. The present study demonstrates the electronic and optoelectronic properties of polyfluorene enhanced by incorporating hole transporting indolocarbazole with different linkages.

Novel compounds for organic electronic material and organic electroluminescent device using the same

Abstract: Provided are a novel compound for an organic electronic material and an organic electroluminescent device using the same. The compound for an organic electronic material according to the present invention has high electron transport efficiency, thereby preventing crystallization at the time manufacturing of a device, and allows a layer to be easily formed, thereby improving current characteristics of the device, and thus an OLED device having a lowered driving voltage and improved power efficiency as well as superior luminous efficiency and lifespan characteristics as compared with the existing material can be manufactured.

Material for organic electroluminescence device and organic electroluminescence device using the same

Abstract: Provided are an organic electroluminescence device, which shows high luminous efficiency, is free of any pixel defect, and has a long lifetime, and a material for an organic electroluminescence device for realizing the device. The material for an organic electroluminescence device is a compound having a π-conjugated heteroacene skeleton crosslinked with a carbon atom, nitrogen atom, oxygen atom, or sulfur atom. The organic electroluminescence device has one or more organic thin film layers including a light emitting layer between a cathode and an anode, and at least one layer of the organic thin film layers contains the material for an organic electroluminescence device.

Chemistry and Properties of Indolocarbazoles

Abstract: The indolocarbazoles are an important class of nitrogen heterocycles which has evolved significantly in recent years, with numerous studies focusing on their diverse biological effects, or targeting new materials with potential applications in organic electronics. This review aims at providing a broad survey of the chemistry and properties of indolocarbazoles from an interdisciplinary point of view, with particular emphasis on practical synthetic aspects, as well as certain topics which have not been previously accounted for in detail, such as the occurrence, formation, biological activities, and metabolism of indolo[3,2-b]carbazoles. The literature of the past decade forms the basis of the text, which is further supplemented with older key references.

Halogen compound, polycyclic compound, and organic electroluminescence element comprising the polycyclic compound

Abstract: Provided are a polycyclic compound having a n-conjugated heteroacene skeleton crosslinked with a carbon atom, a nitrogen atom, an oxygen atom, or a sulfur atom, and a halogen compound which can be used for the synthesis of the polycyclic compound Also provided are an organic electroluminescence device which has one or more organic thin film layers including a light emitting layer between a cathode and an anode, at least one layer of the organic thin film layers containing a material for an organic electroluminescence device, and which shows high luminous efficiency and has a long lifetime, a polycyclic compound for realizing the same, and a halogen compound serving as an intermediate for the polycyclic compound