Metal phosphates have shown good hydrogen evolution reaction catalytic ability, but as counter electrode (CE) materials they are rarely used in dye-sensitized solar cell (DSSC). A strategy that introduction of Co₂P₂O₇ as a “collaborator” to improve the catalytic performance of Co₄S₃ for the DSSC. The Co₄S₃/Co₂P₂O₇ film grew on carbon paper (CP) was synthesized by using a hydrothermal route and vapor deposition method, and served as platinum-free (Pt-free) CE for DSSC. The composite materials of Co₄S₃/Co₂P₂O₇ has many advantages of unique spherical morphology, large special surface area, more active sites and fast reaction kinetics for the reduction of I⁻/I₃⁻. Under optimal conditions, a DSSC based on the Co₄S₃/Co₂P₂O₇/CP CE achieves a high power conversion efficiency of 8.99%, which is comparable to that of the Pt (7.49%) and CoS_1.097/CP (8.18%) CEs. The results indicate that the Co₄S₃/Co₂P₂O₇/CP CE with the advantages of efficient and facile synthesis is a promising alternative to the expensive Pt CE for the DSSCs in the future.

金属磷酸盐已显示出良好的析氢反应催化能力，但作为对电极（CE）材料，它们很少用于染料敏化太阳能电池（DSSC）。引入Co ₂ P ₂ O ₇作为“合作者”以提高DSSC的Co ₄ S ₃催化性能的策略。采用水热法和气相沉积法合成了在碳纸（CP）上生长的Co ₄ S ₃ /Co ₂ P ₂ O ₇薄膜，并作为DSSC的无铂（Pt-free）CE。Co ₄ S ₃ /Co ₂复合材料P ₂ O ₇具有独特的球形形态、大的比表面积、更多的活性位点和快速还原I ^- /I ₃ ^{- 的}反应动力学等诸多优点。在最佳条件下，基于 Co ₄ S ₃ /Co ₂ P ₂ O ₇ /CP CE的 DSSC实现了 8.99% 的高功率转换效率，与 Pt (7.49%) 和 CoS _1.097 /CP相当(8.18%) CE。结果表明，Co ₄ S ₃ /Co ₂ P ₂ O ₇/CP CE 具有高效和简便合成的优点，是未来用于 DSSC 的昂贵 Pt CE 的有前途的替代品。