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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维普
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