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中文摘要：
有机太阳能电池（OSCs）因成本低、质量轻、柔性和可大面积制备等优点而被广泛关注。本文通过定向合成有机配合物Re-BCP，首次将其作为阴极缓冲层引入到OSCs中。通过实验发现，OSCs效率与Re—BCP层厚度密切相关。在标准太阳光照条件下，结构为ITO／CuPc（20nm）／C60（40nm）／Re-BCP（x nm）／Al（100nm）器件的效率随着Re-BCP厚度的增加先增大后变小，当其厚为0nm时，效率为0．65％；厚为7nm时，效率为1．10％；而当厚为10nm时，效率降为0．50％。结合器件结构，探讨了器件性能提高的机理。
英文摘要：
Organic solar cells （OSCs） have received considerable attention due to their many merits such as low cost, light weight, and compatibility with large-area and flexible substrates. In addition, during the past decades, Re-complexes as efficient phosphorescent materials have been applied successfully in organic light emitting diodes thanks to their chemical and thermal stability,short lifetime and high quantum efficiency. In this paper, we introduce Re （CO） 3 Cl （bathocuproine） （Re-BCP） to OSCs as cathode buffer layer. The current density-voltage characteristics of the OSCs under AM1.5 solar illumination show that the power conversion efficiency depends on the thickness of the buffer layer. Efficiency increases at first and then decreases. When the thickness is 0 nm,tbe efficiency is 0. 65% ;when the thickness is 7 nm,the efficiency is 1.10% ;but when the thickness increases to 10 nm,the efficiency decreases to 0.50%. This can be understood as follows. Thin Re-BCP layer decorated cathode can provide a good ohmic contact and be in favor of electron transport. However,when the Re-BCP layer thickness exceeds 10 nm, short current denisty and fill factor will decrease because the electron won＇t transport through cathode buffer layer, then the power conversion efficiency decreases.
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