研究目的
To study the influence of the electron donor and electron acceptor ancillary ligand and number of anchoring group (COOH) on the light harvesting efficiency (LHE), ground and excited state oxidation potentials, incident-photon-to-current conversion efficiency (IPCE), short-circuit photocurrent density (J), and total solar-to-electric conversion efficiency (%η) for DSSCs.
研究成果
The study demonstrated the significant impact of the electron donor and electron acceptor ancillary ligand and the number of anchoring groups on the performance of DSSCs. The novel Ru (II) complexes showed promising results in terms of photocurrent density and total conversion efficiency. The findings open the door for the molecular engineering of better light harvesting and more efficient Ru (II) complexes for DSSCs.
研究不足
The study focuses on the synthesis and characterization of two novel Ru (II) complexes for DSSCs. The limitations include the specific conditions under which the experiments were conducted and the potential for optimization in the synthesis and application of these complexes in DSSCs.
1：Experimental Design and Method Selection:
The synthesis of two novel ruthenium (II) complexes (IA-5, IA-6) was carried out using Knoevenagel reaction. The photophysical and photovoltaic properties were characterized using UV–Vis, emission spectrophotometry, FT-IR, ESI-MS, and 1H NMR. DFT/TD-DFT calculations were employed to probe the interrelationship between the chemical structure, photophysical and photoelectrochemical properties.
2：Sample Selection and Data Sources:
The solvents and chemicals were purchased from Sigma-Aldrich, Fisher Scientific or TCI-America. The molecular structures of the dyes were characterized using various spectral techniques.
3：List of Experimental Equipment and Materials:
Cary 3 Spectrophotometer, Fluorolog-311, Thermo Nicolet, Nexus 470 FTIR Spectrophotometer, Agilent Technologies 6210 LC-TOF mass spectrometer, BioLogic SP-150 electrochemical workstation, solar simulator (WXS-155S-10), QEX10 PV measurement system.
4：Experimental Procedures and Operational Workflow:
The synthesis involved a one-pot three-step reaction protocol. The photovoltaic and IPCE measurements were performed using sandwich cells. The electrochemical and photovoltaic measurements were made by illuminating the cell through the conducting glass from the anode side with a solar simulator.
5：Data Analysis Methods:
The photophysical and photoelectrochemical properties were analyzed using DFT/TD-DFT calculations. The IPCE was calculated according to a specific equation provided in the paper.
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