Efficient, stable and low-cost solar cells are being desired for the photovoltaic conversion of solar energy into electricity for sustainable energy production. Nanorod/nanowire arrays of narrow-bandgap semiconductors are the promising light-harvesters for photovoltaics because of their excellent optoelectrical properties. Here, the array of preferentially oriented antimony trisulfide (Sb₂S₃) single-crystalline nanorods is grown on polycrystalline titania (TiO₂) film by a tiny-seed-assisted solution-processing strategy, offering an Sb₂S₃/TiO₂ nanoarray heterojunction system on a large scale. It is demonstrated that the Sb₂S₃ nanorod growth follows a tiny-seed-governed orientation-competing-epitaxial nucleation/growth mechanism. Using a conjugated polymer hole transporting layer on the heterojunction, we achieve a power conversion efficiency of 5.70% in the stable hybrid solar cell with a preferred p-type/intrinsic/n-type architecture featuring effectively straightforward charge transport channels and no negative impact of photogenerated electric field on device performance. An architecture-dependent charge distribution model is proposed to understand the unique photovoltaic behavior.

需要高效、稳定和低成本的太阳能电池，用于将太阳能光伏转化为电能以实现可持续能源生产。窄带隙半导体的纳米棒/纳米线阵列由于其优异的光电特性而成为有前途的光伏光收集器。在这里，优先取向的三硫化锑 (Sb ₂ S ₃ ) 单晶纳米棒阵列通过微小种子辅助溶液处理策略在多晶二氧化钛 (TiO ₂ ) 薄膜上生长，提供了 Sb ₂ S ₃ /TiO ₂大规模纳米阵列异质结系统。结果表明，Sb ₂ S ₃纳米棒生长遵循微小种子控制的取向竞争外延成核/生长机制。在异质结上使用共轭聚合物空穴传输层，我们在稳定的混合太阳能电池中实现了 5.70% 的功率转换效率，具有优选的 p 型/本征/n 型架构，具有有效直接的电荷传输通道，并且对光生电场对器件性能的影响。提出了一种依赖于架构的电荷分布模型来理解独特的光伏行为。