1268604-60-9

Upstream product

• 1268604-56-3 10-(3,5-bis(trifluoromethyl)phenyl)-10H-phenothiazine 
• 92-84-2 10H-phenothiazine 
• 328-70-1 3,6-bis(trifluoromethyl)bromobenzene 
• 328-73-4 3,5-bis(trifluoromethyl)iodobenzene 

Downstream Products

• 1268604-63-2 C₂₀H₉Br₂F₆NO₂S 
• 1268604-67-6 C₇₀H₇₅F₆NO₂S 

Relevant academic research and scientific papers

Molecular design and photovoltaic performance of organic dyes containing phenothiazine for dye-sensitized solar cells

We synthesized novel organic photosensitizers based on fluorine-substituted phenothiazine with thiophene bridge units in the chromophore for application in dye-sensitized solar cells (DSSCs). Furthermore, organic dyes with different acceptors exhibited higher molar extinction coefficients, and better light absorption at longer wavelengths. The photovoltaic properties of organic dyes composed of different acceptors in their chromophores were measured to identify their effects on the DSSC performance. The organic dye, PFSCN2 containing multi-cyanoacrylic acid as the electron acceptor, showed a power conversion efficiency of 4.67% under AM 1.5 illumination (100 mW/cm2). The retarded recombination kinetics from TiO2 electrode to electrolyte enhanced the electron life time of the organic dye, PFSCN2 in the photoanode of the DSSC. This was confirmed with impedance analysis.

Synthesis and characterization of fluorene-based oligomers and polymers incorporating N-arylphenothiazine-S,S-dioxide units

A series of 3,7-bis(9,9-di-n-hexylfluoren-2-yl)-N-arylphenothiazine-S,S- dioxide trimers and (9,9-di-n-octylfluorene-2,7-diyl-co-N-arylphenothiazine-S,S- dioxide) co-polymers, with varying ratios of phenothiazine-S,S-dioxide units, have been prepared in good yields by palladium-catalyzed cross-coupling reactions. The materials are deep blue emitters and show no solvatochromism or evidence for an intramolecular charge-transfer state. The photoluminescence quantum yields of the trimers are φPL 15-30% in solution and 14-25% in films. The polymers demonstrated very high values in solution (φPL 74-84%) and φPL values in films of 28-47%. The estimated HOMO energy levels are between -5.64 and -5.62 eV for the polymers with 15% incorporation of the phenothiazine-S,S-dioxide units. An analogous N-arylphenothiazine co-polymer shows significantly red shifted absorption and emission. Solution electrochemical data and density functional theory calculations are also presented.