研究目的
To design and synthesize low band gap conjugated polymers for high-performance polymer solar cells (PSCs) by incorporating electron-withdrawing units and bi(thienylenevinylene) side chains.
研究成果
The synthesized polymers PBDT-TVT-ID and PBDT-TVT-DTNT exhibited good thermal stability, broad absorption spectra, and deep HOMO energy levels, leading to photovoltaic devices with PCEs of 4.09% and 5.44%, respectively. The study demonstrates the potential of BDT units with TVT conjugated side chains for high-performance PSCs.
研究不足
The study is limited by the solubility and phase separation issues of the polymers, which affect the film morphology and, consequently, the photovoltaic performance.
1：Experimental Design and Method Selection
The study involved the synthesis of two donor-acceptor (D-A) typed copolymers using Stille-coupling polymerization. The polymers were characterized for thermal stability, optical properties, and photovoltaic performance.
2：Sample Selection and Data Sources
The polymers PBDT-TVT-ID and PBDT-TVT-DTNT were synthesized and characterized using NMR, TGA, UV-Vis absorption spectra, CV, and AFM.
3：List of Experimental Equipment and Materials
Bruker DRX 400 spectrometer, TGA 2050 thermal analysis system, UV-1800 spectrophotometer, CHI600D electro-chemical workstation, MFP-3D-SA AFM.
4：Experimental Procedures and Operational Workflow
Polymers were synthesized via Stille-coupling polymerization, characterized, and used to fabricate photovoltaic devices with ITO/PFN/polymers:PC71BM/MoO3/Ag structure.
5：Data Analysis Methods
Data were analyzed using GPC, CV, UV-Vis spectroscopy, and AFM to determine molecular weights, energy levels, absorption spectra, and surface morphologies.
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