913738-04-2

Usage

Uses

Used in Organic Light Emitting Diode (OLED) Industry:
9,9'-(2,8-Dibenzothiophenediyl)bis-9H-carbazole is used as a bipolar host material for blue TADF devices in the OLED industry. Its unique molecular structure allows for efficient energy transfer and improved device performance, leading to enhanced external quantum efficiencies.
Used in Advanced Lighting and Display Technology:
In the field of advanced lighting and display technology, 9,9'-(2,8-Dibenzothiophenediyl)bis-9H-carbazole serves as a key component in the development of high-efficiency OLED devices. Its application contributes to the creation of energy-efficient, long-lasting, and high-quality lighting and display solutions.
Used in Research and Development:
9,9'-(2,8-Dibenzothiophenediyl)bis-9H-carbazole is also utilized in research and development settings, where scientists and engineers explore its potential applications and optimize its performance in various electronic devices. This includes the investigation of new materials and processes to further improve the efficiency and functionality of TADF-based OLEDs.

Upstream product

• 31574-87-5 2,8-dibromodibenzothiophene 
• 86-74-8 9H-carbazole 
• 132-65-0 dibenzothiophene 

Relevant academic research and scientific papers

Fluorescent and electrochromic polymers from 2,8-di(carbazol-9-yl)dibenzothiophene and its S,S-dioxide derivative

We report the synthesis and characterization of two carbazole-endcapped monomers, namely 2,8-di(carbazol-9-yl)dibenzothiophene (SCz) and 2,8-di(carbazol-9-yl)dibenzothiophene S,S-dioxide (SO2Cz), and their derived polymers PSCz and PSO2Cz prepared by both FeCl3 oxidative coupling and electropolymerization processes. The dilute solutions of PSCz and PSO2Cz prepared by chemical oxidative coupling exhibited fluorescent and solvatochromic behavior. Thin polymeric films could be robustly electrodeposited onto the surface of the ITO-glass substrate by repetitive cyclic voltammetry scanning of monomers SCz and SO2Cz in an electrolyte solution between 0 and 1.8?V. The electrochemically generated polymer films exhibited two reversible oxidation redox couples due to successive oxidations of the biscarbazole unit. These polymer films also revealed good electrochemical and electrochromic stability, with coloration change from a colorless neutral state to yellow, green and blue oxidized states. Switching ability of the polymers was evaluated by kinetic studies upon measuring the percent transmittance (%T) at their maximum contrast point, indicating that the polymers exhibit moderate electrochromic performance.

High-performance bipolar host materials for blue TADF devices with excellent external quantum efficiencies

New bipolar host molecules composed of carbazole, pyridoindole, and dibenzothiophene (DBT) were synthesized for blue thermally activated delayed fluorescence (TADF)-based organic light-emitting diodes (OLEDs). 2,8-Di(9H-carbazol-9-yl)dibenzo[b,d]thiophene, 9-(8-(9H-carbazol-9-yl)dibenzo[b,d]thiophen-2-yl)-9H-pyrido[2,3-b]indole, and 2,8-bis(9H-pyrido[2,3-b]indol-9-yl)dibenzo[b,d]thiophene were prepared based on the selective reactivity at the 2,8-positions of DBT. The new symmetric and asymmetric host materials exhibited high triplet energies (2.89-2.95 eV). 4,5-Di(9H-carbazol-9-yl)phthalonitrile (2CzPN) was selected as an emitting dopant for achieving sky-blue emissions in TADF-OLEDs. 2CzPN-doped TADF-OLEDs, whose configuration is ITO (50 nm)/HATCN (7 nm)/TAPC (75 nm)/host:6% 2CzPN (20 nm)/TmPyPB (50 nm)/LiF (15 nm)/Al (100 nm), showed low driving voltages and high external quantum efficiencies (EQEs). These results are attributed to the well-controlled bipolar character of the host giving a better charge balance in the emitting layer. In particular, the device containing ZDN:6% 2CzPN showed an unprecedentedly high EQE of 25.7% (at 0.074 mA cm-2).

Dibenzothiophene derivatives as host materials for high efficiency in deep blue phosphorescent organic light emitting diodes

Various dibenzothiophene derivatives were synthesized as high triplet energy host materials for deep blue phosphorescent organic light-emitting diodes (PHOLEDs) and their device performances were investigated. Dibenzothiophene host materials with a hole transport type carbazole and electron transport type phosphine oxide moieties showed high quantum efficiency and low driving voltage due to balanced charge injection and transport. A high quantum efficiency of 20.2% and only 10% reduction of quantum efficiency at 1000 cd m-2 were demonstrated from the deep blue PHOLEDs with the dibenzothiophene based high triplet energy host materials. The Royal Society of Chemistry.

Tuning the optoelectronic properties of 4,4′-N, N′-dicarbazole- biphenyl through heteroatom linkage: New host materials for phosphorescent organic light-emitting diodes

(Equation Presented). Five carbazole end-capped heterofluorenes (CzHFs) designed by structurally mimicking 4,4′-N,N′-dicarbazole-biphenyl (CBP) via connecting the biphenyl core of CBP with the linking atom of C, P, N, O, and S, respectively, were synthesized successfully, and their optoelectronic properties were investigated. The theoretical calculations and experimental results demonstrate that CzHFs are potential green, red, and even blue hosts for phosphorescent light-emitting diodes (PHOLEDs) with more desirable localization and energy levels of HOMO and LUMO and also higher triplet energy than CBP.