Enhancing electron collection efficiency and effective diffusion length in dye-sensitized solar cells

Daniel Kwan Pang Wong, Chen Hao Ku, Yen Ru Chen, Guan Ren Chen, Jih Jen Wu

研究成果: Article

68 引文 斯高帕斯(Scopus)


Intensity-modulated photocurrent spectroscopy and intensitymodulated photovoltage spectroscopy are employed to measure the dynamics of electron transport and recombination in the ZnO nanowire (NW) array-ZnO/layered basic zinc acetate (LBZA) nanoparticle (NP) composite dye-sensitized solar cells (DSSCs). The roles of the vertical ZnO NWs and insulating LBZA in the electron collection and transport in DSSCs are investigated by comparing the results to those in the TiO2 - NP, horizontal TiO2 - NW and vertical ZnO-NW-array DSSCs. The electron trans-port rate and electron lifetime in the ZnO NW/NP composite DSSC are superior to those in the conventional TiO 2-NP cell due to the existence of the vertical ZnO NWs and insulating LBZA. It indicates that the ZnO NW/NP composite anode is able to sustain efficient electron collection over much greater thickness than the TiO 2-NP cell does. Consequently, a larger effective electron diffusion length is available in the ZnO composite DSSC.

頁(從 - 到)2698-2702
出版狀態Published - 2009 十月 19


All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry