研究目的
To design and synthesize a new donor–acceptor (D–A) polymer based on thieno[2,3-f]benzofuran (TBF) with 4-dodecyl thienyl chains for use in fullerene-free solar cells, and to investigate its optical, electrochemical, photovoltaic properties, and device active layer morphology.
研究成果
The PTBFDO-BDD-based PSCs achieved a PCE of 7.15% with a VOC of 0.803 V, a JSC of 14.71 mA cm?2, and a FF of 60.57%. The Eloss of PTBFDO-BDD-based PSCs is below common value of PSCs, demonstrating that thieno[2,3-f]benzofuran-based conjugated polymers are promising as polymer solar cells donor materials.
研究不足
The solubility of the polymer in solvents (CB and o-DCB) was poor, leading to undissolved polymer remains inside the blends, which is unfavorable for hole transport and affects the device's performance.
1：Experimental Design and Method Selection:
The polymer PTBFDO-BDD was synthesized via Stille coupling with TBFDO-Sn and BDD-Br. The optical, electrochemical, and photovoltaic properties were investigated.
2：Sample Selection and Data Sources:
The polymer was characterized using UV–vis absorption spectra, electrochemical cyclic voltammetry (CV), and photovoltaic performance tests.
3：List of Experimental Equipment and Materials:
Instruments included a Bruker Advance III 400 NMR spectrometer, gel permeation chromatography (GPC), STA-409 TGA instrument, Hitachi U-4100 spectrophotometer, CHI660D electrochemical workstation, and Keithley 2400 source measurement apparatus.
4：Experimental Procedures and Operational Workflow:
The polymer was synthesized, characterized, and used to fabricate PSCs with a configuration of ITO/PEDOT:PSS/PTBFDO-BDD:ITIC/PDINO/Al. The devices were tested under AM 1.5G illumination.
5：5G illumination.
Data Analysis Methods:
5. Data Analysis Methods: The optical band gap was calculated from UV–vis spectra, HOMO and LUMO levels from CV, and photovoltaic performance from J-V curves.
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