Improving the photovoltaic performance directly by innovative device architectures contributes much progress in the field of organic solar cells. Photovoltaic device using different kinds of heterojunction with the given set of organic semiconductors paves the way to a better understanding of the working mechanism of organic heterojunction. Here, we report on the fabrication of a new device structure without employing extra material. A thin film of the donor material (chloroaluminum phthalocyanine (ClAlPc)) is inserted between ClAlPc:C60 bulk heterojunction (BHJ) and C60 layer by glancing angle deposition. A ClAlPc/C60 planar heterojunction co-exists with ClAlPc:C60 BHJ simultaneously in this device. Higher efficiency is obtained with this novel device structure. The effects of this additional ClAlPc layer on open-circuit voltage and fill factor in photovoltaic cells are studied. This work provides a new route to improve the device performance of organic solar cells.

通过创新的器件架构直接提高光伏性能为有机太阳能电池领域的进步做出了巨大贡献。使用不同种类异质结和给定有机半导体的光伏器件为更好地理解有机异质结的工作机制铺平了道路。在这里，我们报告了在不使用额外材料的情况下制造新器件结构的情况。通过掠射角沉积将供体材料（氯铝酞菁 (ClAlPc)）薄膜插入 ClAlPc:C60 本体异质结 (BHJ) 和 C60 层之间。 ClAlPc/C60 平面异质结与 ClAlPc:C60 BHJ 同时共存于该器件中。这种新颖的器件结构可以获得更高的效率。研究了附加的 ClAlPc 层对光伏电池开路电压和填充因子的影响。这项工作为提高有机太阳能电池的器件性能提供了一条新途径。