Design,Synthesis,and Performance Study of Polymer Donor Materials with Alkyne Bonds in Organic Solar Cells
We have successfully developed and synthesized polymer donor materials with alkyne bonds incorporated into the main chain,using structurally simple and cost-effective materials.The incorporation of alkyne bonds significantly enhances the electron-withdrawing ability of the polymer backbone,leading to a lower highest occupied molecular orbital(HOMO)energy level and a wider bandgap for the polymer.To further explore the potential applications of these materials,we fabricated organic solar cell(OSC)devices by blending the polymer donor materials with the small molecule acceptor material BTP-eC9-4F.These devices exhibited remarkably low non-radiative energy losses and achieved a high open circuit voltage(Voc).Notably,the device based on PBEA demonstrated exceptional performance,with a Voc of 0.91 V,a short-circuit current density(Jsc)of 20.70 mA/cm2,and a power conversion efficiency(PCE)of 10.39％.In comparison,the PBEA-F device only achieved a PCE of 5.50％.These results highlight the superior performance of our designed polymer donor materials,which can be attributed to the introduction of alkyne bonds.The enhanced electron-withdrawing ability of the polymer backbone contributes to the reduction of non-radiative energy losses and the improvement of device performance.Our findings not only demonstrate the potential of these materials for high-performance organic solar cells but also underscore the importance of rational material design in achieving efficient energy conversion.
Organic solar cellsAlkyne bondsPolymer donor materialsSimple and cost-effective
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