研究目的
Investigating the role of processing solvent additives on the formation of polymer-perylene diimide bulk-heterojunction active layers for organic photovoltaics.
研究成果
The use of DPE as a non-halogenated solvent additive leads to uniform active layer film formation and improved OPV performance, especially when transitioning from spin-coating to slot-die coating methods. The study highlights the importance of ink formulations for scalable OPV fabrication.
研究不足
The study is limited to the comparison of DIO and DPE as solvent additives and their effects on the aggregation behavior of tPDI2N-EH in neat and blended films. The transition from spin-coating to slot-die coating methods is also explored, but the study does not cover other solvent additives or coating methods.
1：Experimental Design and Method Selection:
The study compares the effect of 1,8-diiodooctane (DIO) and diphenyl ether (DPE) as solvent additives on the aggregation behavior of the non-fullerene acceptor tPDI2N-EH in neat films and blended films with the benzodithiophene-quinoxaline (BDT-QX, QX-3) donor polymer, processed from toluene in air.
2：Sample Selection and Data Sources:
Neat thin films of QX-3 and tPDI2N-EH were spin-coated from toluene solutions with and without
3：0% v/v solvent additive. List of Experimental Equipment and Materials:
Optical absorption spectroscopy, cross-polarized optical microscopy (POM), and fluorescence microscopy (FM) were used for analysis.
4：Experimental Procedures and Operational Workflow:
BHJ films were processed without and with varying amounts of the solvent additives DIO and DPE.
5：Data Analysis Methods:
Analysis of thin films was carried out using optical absorption spectroscopy, POM, and FM.
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