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.
Hyo Jeong
HJ
Jo
Jung Eun
JE
Nam
Kyoseung
K
Sim
Dae-Hwan
DH
Kim
Jae Hong
JH
Kim
Jin-Kyu
JK
Kang
D065638:Absorption, Radiation; D004396:Coloring Agents / Q000737:chemistry*; D011211:Electric Power Supplies; D004563:Electrochemistry; D008027:Light; D055620:Optical Phenomena; D010640:Phenothiazines / Q000737:chemistry*; D012993:Solar Energy
D004396:Coloring Agents; D010640:Phenothiazines; C031637:phenothiazine