1609238-89-2

Upstream product

• 1609238-87-0 7-bromo-9,9,9′,9′-tetrahexyl-7′-iodo-9H,9′H-2,2′-bifluorene 
• 122-39-4 diphenylamine 
• 865152-20-1 (7′-bromo-9,9,9′,9′-tetrahexyl-9H,9′H-2,2′-bifluoren-7-yl)(trimethyl)silane 
• 209603-47-4 7-bromo-9,9-dihexyl-N,N-diphenyl-9H-fluoren-2-amine 
• 189367-54-2 2,7-dibromo-9,9-di-n-hexylfluorene 

Downstream Products

• 1609238-91-6 (9,9,9′,9′-tetrahexyl-7′-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9H,9′H-2,2′-bifluoren-7-yl)diphenylamine 

Relevant academic research and scientific papers

Monodisperse Six-Armed Starbursts based on Truxene-Cored Multibranched Oligofluorenes: Design, Synthesis, and Stabilized Lasing Characteristics

A series of monodisperse six-armed conjugated starbursts (Tr1F, Tr2F, and Tr3F) containing a truxene core and multibranched oligofluorene bridges capped with diphenylamine (DPA) units has been designed, synthesized, and investigated as robust gain media for organic semiconductor lasers (OSLs). The influence of electron-rich DPA end groups on their optoelectronic characteristics has been discussed at length. DPA cappers effectively raise HOMO levels of the starbursts, thus enhancing the hole injection and transport ability. Solution-processed electroluminescence devices based on the resulting six-armed starbursts exhibited efficient deep-blue electroluminescence with clear reduced turn-on voltages (3.2–3.5 V). Moreover, the resulting six-armed molecules showed stabilized electroluminescence and amplified spontaneous emission with low thresholds (27.4–63.9 nJ pulse?1), high net gain coefficients (80.1–101.3 cm?1), and small optical loss (2.6–4.4 cm?1). Distributed feedback OSLs made from Tr3F exhibited a low lasing threshold of 0.31 kW cm?2 (at 465 nm). The results suggest that the construction of truxene-centered six-armed conjugated starbursts with the incorporation of DPA units can effectively enhance EL properties by precisely regulating the HOMO energy levels, and further optimizing their optical gain properties.

A second indole and three and carbazole-based multi-arm structure conjugated polymer material and its preparation method and application

The invention relates to a diindolotricarbazole-based multi-branch structured conjugated molecular material, as well as a preparation method and application thereof. For the material, diindolotricarbazole is adopted as a core, a diphenylamine group is adopted as a termination unit, and fluorenyls with different chain lengths are adopted as bridging units. The material has a general structural formula shown in the following formula I. The material is easy to prepare, has high thermal stability, film-forming stability, hole transport capability and luminous intensity in an organic electroluminescent device, and has the potential application value in terms of organic electroluminescence, an intermediate is low in cost, a reaction process is easy to control, and a product is easy to separate and high in yield and purity.

Pyrenyl organic semiconductor laser material, preparation method and application thereof

The invention discloses a pyrenyl organic semiconductor laser material, a preparation method and an application thereof. The material has a butterfly-shaped structure which takes pyrene as a core, diphenylamine group as a blocking unit, fluorenyl groups in different chain lengths as bridging units and tetra-substituted symmetric pyrene as core. The material has the structural formula as follows, wherein R is C1-C30 straight chain or branch chain alkyl or alkoxy and n is natural number from 1 to 5. The material disclosed by the invention is simply prepared; the intermediate cost is low; the reaction process is easily controlled; the products are easily separated and are high in yield and purity; the material not only shows high heat stability, low threshold value, low water and oxygen sensitivity and high light intensity in an organic laser device but also shows ultralow turn-on voltage, high luminance and efficiency in an organic electroluminescence device; the pyrenyl organic semiconductor laser material shows important application potential at the aspects of the organic semiconductor laser device and the organic electroluminescence device.

Low turn-on voltage, high-power-efficiency, solution-processed deep-blue organic light-emitting diodes based on starburst oligofluorenes with diphenylamine end-capper to enhance the HOMO level

Two new star-shaped oligofluorenes, HFB-diF-Dpa and HFB-terF-Dpa, with a hexakis(fluoren-2-yl)benzene core and six diphenylamine end-cappers were designed and synthesized. The peripheral diphenylamine groups enhance the HOMO energy levels of the materials, and the bulky star-shaped structures efficiently suppress the intermolecular interaction. Their thermal, photophysical, and electrochemical properties were investigated. The two compounds display strong deep-blue emission both in solution and solid state. Solution-processed devices based on these starbursts exhibit highly efficient and stable deep-blue electroluminescence. Their high-lying HOMO energy levels match very well with that of the hole-injecting material. The double-layered device featuring HFB-diF-Dpa as emitter shows a low turn-on voltage of 3.6 V, a maximum current efficiency of 6.99 cd A-1, and a maximum external quantum efficiency of 5.45% with the CIE coordinate of (0.154, 0.136). In particular, the combination of low driving voltage and high EQE provides an outstanding maximum power efficiency of 6.10 lm W-1, which is the highest for nondoped deep-blue OLEDs based on solution-processable materials. Moreover, these devices present small values of efficiency roll-off at high brightness up to 1000 cd m-2.