Using Benzodithiophene-based Polymer Donors and Triarylamine-based Non-fused Ring Electron Acceptors to Construct Simple Yet Efficient Organic Solar Cells
We utilized a low-cost polymer donor P(C1)with a simple non-fused ring acceptor 2BTh-2F as the active layer material for device preparation.Through careful selection and optimization of additives,the microstructure and interfacial interactions of the device were significantly enhanced,resulting in an excellent power conversion efficiency(PCE)of 14.21％.The device achieves an open-circuit voltage(VOC)as high as 0.861 V,a short-circuit current density(Jsc)of 23.18 mA/cm2,and a fill factor(FF)of 71.21％,which exceed the performance of the control without additives(12.51％).It is noteworthy that this efficiency value is one of the highest achieved to date based on the pairing of a simple polymer donor material with a simple non-fused ring acceptor material.Our work not only demonstrates the great potential of low-cost materials in the preparation of high-performance devices,but also proves that dual low-cost,high-efficiency devices with polymer donors and small-molecule acceptors can be realized by finely tuning the morphology of the blended film and deeply studying the film-forming process.This work opens up a new path for the future development of low-cost and high-performance photovoltaic devices,which is of great scientific significance and practical application value.
Organic solar cellSimple donorNon-fused ring acceptorPhotovoltaic conversion efficiency
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