研究目的
研究有机D-π-A光敏剂受体基团中硫原子的引入对其光学性质的影响及其在染料敏化太阳能电池(DSSCs)中的潜在应用。
研究成果
研究表明,在有机D-π-A型光敏剂受体的取代基中引入硫元素能有效使其吸收光谱红移,从而增强光捕获能力。虽然硫代羧酸1-SO展现出良好的电子注入效率并可用于染料敏化太阳能电池,但其对碱性添加剂的敏感性以及硫代酰胺1-SN较差的性能表明,含硫锚定基团在光伏应用中仍需进一步优化。
研究不足
二硫代羧酸衍生物1-S2因稳定性极低而无法分离?;诹虼0返娜玖?-SN在TiO2上吸附性差,导致光伏效率低下。硫代羧酸染料1-SO对电解质中的碱性添加剂敏感,限制了染料敏化太阳能电池性能的优化。
1:实验设计与方法选择:
本研究涉及硫改性有机敏化剂的合成与表征、采用TD-DFT进行计算分析,以及瞬态吸收光谱评估向TiO2的电子注入效率。
2:样本选择与数据来源:
研究以已知羧酸染料DF15为参照,合成了硫代羧酸1-SO和硫代酰胺1-SN。
3:实验设备与材料清单:
用于硫化的劳森试剂、用于DSSC制备的TiO2,以及用于合成与表征的各种溶剂。
4:实验流程与操作步骤:
硫改性染料的合成、光谱与电化学表征、DSSC的制备及其光伏性能评估。
5:数据分析方法:
紫外-可见光谱、循环伏安法、瞬态吸收光谱,以及使用Gaussian 09进行的计算分析。
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Shimadzu UV-2600 spectrometer
UV-2600
Shimadzu
Used for recording UV-Vis spectra of the compounds in different solvents and adsorbed on TiO2.
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Perkin–Elmer Spectrum BX instrument
Spectrum BX
Perkin–Elmer
Used for recording FT-IR spectra of the compounds.
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Thermo Scientific LCQ-FLEET instrument
LCQ-FLEET
Thermo Scientific
Used for obtaining ESI-MS spectra of the compounds.
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Agilent B2901A digital source-meter
B2901A
Agilent
Used for measuring the generated photocurrent in the solar cell devices.
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Lawesson’s reagent
Used for the thionation of carboxylic derivatives to synthesize thiocarboxylic acid and thioamide derivatives.
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TiO2
Ti-Nanoxide T/SP
Solaronix
Used as the semiconductor material in dye-sensitized solar cells for dye adsorption and electron injection.
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Glassy carbon working electrode
BAS
Used in cyclic voltammetry for electrochemical characterization of the dyes.
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Platinum counter electrode
BAS
Used in cyclic voltammetry as the counter electrode.
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Ag/AgCl reference electrode
BAS
Used in cyclic voltammetry as the reference electrode.
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BAS 100A electrochemical analyzer
BAS 100A
BAS
Used as a polarizing unit in cyclic voltammetry.
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Solaronix TCO30-8
TCO30-8
Solaronix
Conductive glass substrate used for the fabrication of dye-sensitized solar cells.
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GreatCell counter electrodes
GreatCell
Pt counter electrodes used in the fabrication of dye-sensitized solar cells.
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ABET SUN2000 solar simulator
SUN2000
ABET
Used for measuring the current density-voltage (J/V) characteristics of the solar cell devices under AM 1.5G illumination.
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