Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan.
Phys Chem Chem Phys. 2012 Oct 21;14(39):13539-48. doi: 10.1039/c2cp41760j.
Quantum dot-sensitized solar cells (QDSCs) constructed using cascade CdS/CdSe sensitizers and the novel tetrapod-like ZnO nanoparticles have been fabricated. The cascade co-sensitized QDSCs manifested good electron transfer dynamics and overall power conversion efficiency, compared to single CdS- or CdSe-sensitized cells. The preliminary CdS layer is not only energetically favorable to electron transfer but behaves as a passivation layer to diminish the formation of interfacial defects during CdSe synthesis. On the other hand, the anisotropic tetrapod-like ZnO nanoparticles, with a high electron diffusion coefficient, can afford a better carrier transport than traditional ZnO nanoparticles. The resultant solar cell yielded an excellent performance with a solar power conversion efficiency of 4.24% under simulated one sun (AM1.5G, 100 mW cm(-2)) illumination.
采用级联 CdS/CdSe 敏化剂和新型四足状 ZnO 纳米粒子制备了量子点敏化太阳能电池（QDSCs）。与单 CdS 或 CdSe 敏化电池相比，级联共敏化 QDSCs 表现出良好的电子转移动力学和整体功率转换效率。初步的 CdS 层不仅有利于电子转移，而且还可以作为钝化层来减少 CdSe 合成过程中界面缺陷的形成。另一方面，具有高电子扩散系数的各向异性四足状 ZnO 纳米粒子可以提供比传统 ZnO 纳米粒子更好的载流子输运性能。所得太阳能电池在模拟的阳光（AM1.5G，100 mW cm(-2))照射下，具有 4.24%的优异光电转换效率。
