研究目的
Investigating the design and synthesis of new n-type porphyrin acceptors with subtle side-chain engineering for efficient nonfullerene solar cells with low energy loss and optoelectronic response covering the near-infrared region.
研究成果
The study concludes that the design of new n-type porphyrin acceptors with subtle side-chain engineering can lead to highly efficient nonfullerene solar cells with low energy loss and optoelectronic response covering the near-infrared region. The P-2 acceptor, with four dodecoxyl side-chains, achieves the highest PCE of 7.23%, attributed to its high-lying LUMO energy level, strong absorption in the visible and NIR region, and more ordered face-on molecular packing.
研究不足
The study is limited by the challenges in realizing a balance between solubility and intermolecular interactions for porphyrin dyes, as well as achieving suitable energy levels for high VOC and broad solar flux absorption for high JSC.
1：Experimental Design and Method Selection:
The study involves the design and synthesis of a series of novel n-type porphyrin derivatives coupled with a strong electron-withdrawing terminal moiety for a stronger push–pull effect.
2：Sample Selection and Data Sources:
The samples used are PTB7-Th donor and porphyrin acceptors (P-x) with complementary absorption.
3：List of Experimental Equipment and Materials:
Instruments and materials include PTB7-Th polymer, porphyrin acceptors (P-1, P-2, P-3), and common organic solvents like chloroform, chlorobenzene, and o-dichlorobenzene.
4：Experimental Procedures and Operational Workflow:
The synthetic routes of P-1, P-2, and P-3 are outlined, involving the connection of di-brominated porphyrin precursors with the thiophene bridge, then putting on the 2FIC substituents.
5：Data Analysis Methods:
The optical and electrochemical properties are analyzed using UV?vis?NIR absorption spectra, cyclic voltammograms (CV), and differential polarized voltammograms (DPV).
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