High-efficiency cascade CdS/CdSe quantum dot-sensitized solar cells based on hierarchical tetrapod-like ZnO nanoparticles

Hsin Ming Cheng, Kuo Yen Huang, Kun Mu Lee, Pyng Yu, Shih Chin Lin, Jin Hua Huang, Chun Guey Wu, Jau Tang

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

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.

Original languageEnglish
Pages (from-to)13539-13548
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume14
Issue number39
DOIs
StatePublished - 21 Oct 2012

Fingerprint

Dive into the research topics of 'High-efficiency cascade CdS/CdSe quantum dot-sensitized solar cells based on hierarchical tetrapod-like ZnO nanoparticles'. Together they form a unique fingerprint.

Cite this