Assembly of CdSe onto mesoporous TiO2 films induced by a self-assembled monolayer for quantum dot-sensitized solar cell applications

Lai Wan Chong, Huei Ting Chien, Yuh Lang Lee

研究成果: Article同行評審

111 引文 斯高帕斯(Scopus)

摘要

A self-assembled monolayer (SAM) of 3-mercaptopropyl-trimethyoxysilane (MPTMS) is pre-assembled onto a mesoporous TiO2 film and is used as a surface-modified layer to induce the growth of CdSe QDs in the successive ionic layer adsorption and reaction (SILAR) process. Due to the specific interaction of the terminal thiol groups to CdSe, the MPTMS SAM is found to increase the nucleation and growth rates of CdSe in the SILAR process, leading to a well covering and higher uniform CdSe layer which has a superior ability, compared with the electrode without MPTMS, in inhibiting the charge recombination at the electrode/electrolyte interface. Furthermore, the performance of the CdSe-sensitized TiO2 electrode can further be improved by an additional heat annealing after film deposition, attributable to a better interfacial connection between CdSe and TiO2, as well as a better connection among CdSe QDs. The CdSe-sensitized solar cell prepared by the present strategy can achieve an energy conversion efficiency of 2.65% under the illumination of one sun (AM 1.5, 100 mW cm-2).

原文English
頁(從 - 到)5109-5113
頁數5
期刊Journal of Power Sources
195
發行號15
DOIs
出版狀態Published - 2010 八月 1

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 能源工程與電力技術
  • 物理與理論化學
  • 電氣與電子工程

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