Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals

Wonjoo Lee, Woo Chul Kwak, Sun Ki Min, Jung Chul Lee, Won Seok Chae, Yun Mo Sung, Sung Hwan Han

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

In order to absorb a broad spectrum in visible region, a co-sensitized TiO2 electrode was prepared by CdSe and Mg-doped CdSe quantum dots (Q dots). The power conversion efficiency of the co-sensitized Q dots photoelectrochemical solar cells (PECs) showed 1.03% under air mass 1.5 condition (I = 100 mW/cm2), which is higher than that of individual Q dots-sensitized PECs. The incident-photon-to-current conversion efficiency of the co-sensitized PECs showed absorption peaks at 541 and 578 nm corresponding to the two Q dots and displayed a broad spectral response over the entire visible spectrum in the 500-600 nm wavelength domains.

Original languageEnglish
Pages (from-to)1699-1702
Number of pages4
JournalElectrochemistry Communications
Volume10
Issue number11
DOIs
Publication statusPublished - 2008 Nov 1

Keywords

  • CdSe
  • Co-sensitization
  • Photoelectrochemical cells
  • Quantum dots-sensitized solar cells
  • Spectral broadening

ASJC Scopus subject areas

  • Electrochemistry

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