1398122-59-2

Upstream product

• 1398122-58-1 2-bromo-7-(4-(N,N-di-p-tolylamino)phenyl)-9-oxo-9H-fluorene 
• 58047-42-0 4-bromo-N,N-di-p-tolylaniline 
• 20440-95-3 N-phenyl-di-p-tolylamine 

Downstream Products

• 1398122-60-5 2-cyano-3-{5-{7-{4-[N,N-bis(4-methylphenyl)amino]phenyl}fluorenone-2-yl}thiophen-2-yl}acrylic acid 

Relevant academic research and scientific papers

ORGANIC DYE, DYE-SENSITIZED METAL OXIDE SEMICONDUCTOR ELECTRODE AND DYE-SENSITIZED SOLAR CELL

An object of the present invention is to provide a dye sensitizer for a solar cell having stability and an excellent conversion efficiency. There is provided a dye sensitizer represented by the following general formula, to which a donor site (D) and an acceptor site (A) are bound via linkers (L1)n and (L2)n: (φ is an aromatic ring with or without heteroatom(s); D is a triphenylamine derivative, a carbazole derivative, a coumarine derivative or an indoline derivative; A is an organic residue having an acidic group; each of L1 and L2 is an optionally substituted divalent alkenyl group, aromatic group or heterocyclic group, and n represents an integer of 0 to 3).

Incorporating a stable fluorenone unit into D-A-π-A organic dyes for dye-sensitized solar cells

Two new organic dyes based on a donor-acceptor-π-bridge-acceptor/anchor (D-A-π-A) configuration, HIQF1 and HIQF2, were synthesized, characterized, and successfully employed in dye-sensitized solar cells. The incorporation of the weakly electron-withdrawing fluorenone group as an additional acceptor enhanced the dyes' properties for solar energy conversion in several ways. First, the absorption spectra of the dyes were broadened, covering a large range of sunlight. Second, the absorption spectra observed upon dye adsorption on TiO2 were only slightly blue-shifted as compared to the spectra of the dyes in solution. Third, the orbital energy levels and electron distributions of the D-A-π-A backbone were ideal for highly efficient electron transport and injection. The incorporation of long electron-donating alkoxy groups in the donor unit of HIQF1 further increased the dye's short-circuit photocurrent density (Jsc), open-circuit voltage (Voc), and overall conversion efficiency (η), but had little negative effect on the fill factor (FF). Solar cells sensitized with HIQF1 showed excellent current-voltage characteristics; the Jsc, V oc, and FF values were 12.26 mA cm-2, 0.70 V, and 0.73, corresponding to a η value of 6.26%. The Royal Society of Chemistry.