研究目的
Investigating the photophysical properties of dicarboxylated diphenylisobenzofuran dye bound to nanocrystalline metal oxide surfaces, including excimer formation, singlet fission, electron injection, and low energy sensitization.
研究成果
The study demonstrates that dicarboxylated diphenylisobenzofuran dye bound to nanocrystalline metal oxide surfaces exhibits photophysical properties consistent with singlet fission. The unusual behavior in dye-sensitized solar cells with respect to Al2O3 thickness suggests a mechanism involving singlet excitation, singlet fission, and electron injection from the triplet state. Self-assembled bilayers were shown to be an effective means of incorporating low energy absorbers into the SF scheme.
研究不足
The evolution of triplet states could not be definitively assigned with TA experiments. The complexity of the spectral changes suggests contributions from excimers and/or charge-transfer states, requiring further studies to elucidate the mechanism.
1：Experimental Design and Method Selection:
The study involved the synthesis and coordination of 4,4'-(isobenzofuran-1,3-diyl)dibenzoic acid (1) to nanocrystalline metal oxide surfaces. The photophysical properties were studied using steady-state and time-resolved emission/absorption spectroscopy.
2：Sample Selection and Data Sources:
Nanocrystalline ZrO2 and TiO2 films were used as substrates. Dye loading was performed by soaking the films in solutions of
3：List of Experimental Equipment and Materials:
Fluorine-doped tin oxide (FTO) coated glass, ZrO2 and TiO2 pastes, Ru(bpy)2(4,4′-(COOH)2bpy)Cl2 (RuC), and Co(bpy)3 2+/3+ as redox mediator.
4：Experimental Procedures and Operational Workflow:
Dye loading was monitored using UV-Vis spectroscopy. Emission and absorption spectra were recorded, and transient absorption spectroscopy was used to probe long-lived states.
5：Data Analysis Methods:
Emission kinetics were fit to exponential functions, and TA spectra were analyzed to identify species.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
