title: High-efficiency cascade CdS/CdSe quantum dot-sensitized solar cells based on hierarchical tetrapod-like ZnO nanoparticles.
abstract: 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.
authors: Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan. jemmy@gate.sinica.edu.tw
authors: Hsin-Ming
authors: HM
authors: Cheng
authors: Kuo-Yen
authors: KY
authors: Huang
authors: Kun-Mu
authors: KM
authors: Lee
authors: Pyng
authors: P
authors: Yu
authors: Shih-Chin
authors: SC
authors: Lin
authors: Jin-Hua
authors: JH
authors: Huang
authors: Chun-Guey
authors: CG
authors: Wu
authors: Jau
authors: J
authors: Tang