研究目的
To fabricate and develop an efficient photovoltaic system capable of absorption at long wavelength of the spectrum through the application of two types of benzothiazole and indoline based symmetric squaraine sensitizers containing bis-sulfonate groups which act as anchors for DSSC.
研究成果
The SQTHZ sensitizer exhibits better photovoltaic performance due to strong electronic coupling between SQTHZ sensitizer and the conduction band of TiO2, and the presence of long alkyl chain with pendent bis-SO3- groups that inhibit recombination and decrease the dye aggregation.
研究不足
The low-conversion efficiency in DSSC refers to charge π-aggregates on squaraine sensitizers, causing charge recombination on TiO2 electrode leading to reduced cell efficiency.
1：Experimental Design and Method Selection:
Synthesis of two new symmetric squaraine sensitizers (SQTHZ and SQIND) carrying benzothiazole and indoline moieties.
2：Sample Selection and Data Sources:
Use of TiO2 nanoparticles and conducting glasses substrate indium tin oxide glass slide.
3：List of Experimental Equipment and Materials:
Bruker AVANCE III WM 400 spectrometers, Perkin Elmer UV-1800, Metrohm Autolab PGSTAT 128N, RF-6000 spectrofluorometer.
4：Experimental Procedures and Operational Workflow:
Synthesis processes, UV-vis spectra recording, cyclic voltammetry measurements, fabrication of DSSC.
5：Data Analysis Methods:
Theoretical calculations using Gaussian 09 program package, analysis of photophysical and electrochemical properties.
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