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

58 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

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Nanocrystals
Semiconductor quantum dots
Solar cells
Conversion efficiency
Photons
Wavelength
Electrodes
Air

Keywords

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

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals. / Lee, Wonjoo; Kwak, Woo Chul; Min, Sun Ki; Lee, Jung Chul; Chae, Won Seok; Sung, Yun Mo; Han, Sung Hwan.

In: Electrochemistry Communications, Vol. 10, No. 11, 01.11.2008, p. 1699-1702.

Research output: Contribution to journalArticle

Lee, Wonjoo ; Kwak, Woo Chul ; Min, Sun Ki ; Lee, Jung Chul ; Chae, Won Seok ; Sung, Yun Mo ; Han, Sung Hwan. / Spectral broadening in quantum dots-sensitized photoelectrochemical solar cells based on CdSe and Mg-doped CdSe nanocrystals. In: Electrochemistry Communications. 2008 ; Vol. 10, No. 11. pp. 1699-1702.
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AU - Chae, Won Seok

AU - Sung, Yun Mo

AU - Han, Sung Hwan

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AB - 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.

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