355135-07-8

Basic information

• Product Name: 2-Bromo-9,9-bis(2-ethylhexyl)fluoren
• Synonyms: 2-Bromo-9,9-bis(2-ethylhexyl)fluoren;2-Bromo-9,9-bis(2-ethylhexyl)fluorene;2-bromo-9,9-bis(2-ethylhexyl)-9H-fluorene
• CAS NO: 355135-07-8
• Molecular Formula: C29H41Br
• Molecular Weight: 469.53984
• Mol File: 355135-07-8.mol
• Article Data: 4

Chemical Properties

• Appearance: /
• Refractive Index: 1.5530-1.5570
• CAS DataBase Reference: 2-Bromo-9,9-bis(2-ethylhexyl)fluoren(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Bromo-9,9-bis(2-ethylhexyl)fluoren(355135-07-8)
• EPA Substance Registry System: 2-Bromo-9,9-bis(2-ethylhexyl)fluoren(355135-07-8)

Safety Data

• Hazardous Substances Data: 355135-07-8(Hazardous Substances Data)

Usage

General Description

2-Bromo-9,9-bis(2-ethylhexyl)fluoren is a chemical compound that is commonly used as a building block in the synthesis of organic electronic materials. It is a substituted fluorene derivative with two ethylhexyl groups and a bromine atom attached to the fluorene core. 2-Bromo-9,9-bis(2-ethylhexyl)fluoren is often used in the production of organic light-emitting diodes (OLEDs) and organic photovoltaic cells due to its high thermal stability and efficient electron transport properties. Additionally, it can also be utilized in the manufacturing of semiconducting polymers and as a dopant material in organic electronics. Its specific molecular structure and properties make it a valuable component in the development of advanced electronic devices.

Upstream product

• 18908-66-2 3-bromomethylheptane 
• 1133-80-8 2-bromo-9H-fluorene 
• 86-73-7 9H-fluorene 

Relevant articles and documents

Fluorene Side-Chained Benzodithiophene Polymers for Low Energy Loss Solar Cells

Here we design and synthesize one novel fluorene side-chained benzodithiophene (BDT) monomer for polymer solar cells (PSCs) donor. By copolymerizing this monomer with 4,7-di(thiophen-2-yl)-2,1,3-benzothiadiazole (DTBT) or 4,7-di(4-(2-ethylhexyl)-2-thienyl)-5,6-difluoro-2,1,3-benzothiadiazole (DTffBT), two donor-acceptor (D-A) conjugated polymers PFBDT-DTBT and PFBDT-DTffBT are prepared. PSCs are prepared with these polymers as donor and PC71BM as acceptor. The maximum power conversion efficiency (PCE) of the two polymers PFBDT-DTBT and PFBDT-DTffBT based PSCs is 7.13% (VOC = 0.90 V, JSC = 13.26 mA cm-2, and FF = 0.598) and 7.33% (VOC = 0.96 V, JSC = 13.24 mA cm-2, and FF = 0.577). The UV-vis absorption and electrochemical cyclic voltammetry test results show that F atoms in DTffBT unit present an obvious influence on intermolecular effect and molecular energy levels of polymers. Furthermore, the energy loss of two PSCs devices in this work is confirmed to be 0.78 and 0.71 eV, lower than most results based on BDT PSCs devices, which is critical to obtain high PCE PSCs devices with a decent trade-off between JSC and VOC.

Synthesis and photovoltaic properties of conjugated copolymers bearing bis(9,9-di(2-ethylhexyl)-9H-fluoren-2-yl)quinoxaline subunit with deep HOMO level

A series of alternating copolymers (PT-BDFQx, PC-BDFQx and PBDT-BDFQx) have been synthesized bearing novel planar bis(9,9-di(2-ethylhexyl)-9H-fluoren-2-yl)quinoxaline (BDFQx) as acceptor unit, using benzo[1,2-b:4,5-b′]dithiophene (BDT), thiophene (T) and carbazole (C) as donor units via Stille or Suzuki coupling reactions. XRD characterization indicated that the presence of planar BDFQx unit (monomer 8) is favorable for the promotion of crystallization in the solid state and GPC results illustrated that the import of multiple chains in planar BDFQx unit raises the polymers molecular weight. Electrochemical measurement results suggested that three copolymers possess deep HOMO energy level of -5.50-5.77 eV. The polymer solar cell with structure of ITO/PEDOT:PSS (30 nm)/polymer: PCBM (60 nm)/Bphen (10 nm)/Ag (100 nm) exhibited the highest Voc of 0.80 V with PBDT-BDFQx as p-type polymer, while the best power conversion efficiency (PCE) of 0.9% was obtained using a blend of PBDT-BDFQx and PCBM(1:4) as active layer.