4.6 Article

CdS quantum dots grown by in situ chemical bath deposition for quantum dot-sensitized solar cells

Journal

JOURNAL OF APPLIED PHYSICS
Volume 110, Issue 4, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.3624944

Keywords

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Funding

  1. Ministry of Knowledge Economy (MKE)
  2. Korea Institute for Advancement of Technology (KIAT)
  3. Dae-Gyeong Leading Industry Office through the Leading Industry Development for Economic Region
  4. Korean Ministry of Knowledge Economy [20104010100580]
  5. Ministry of Knowledge Economy (MKE), Republic of Korea [T1210909] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
  6. National Research Foundation of Korea [과C6B1912] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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CdS quantum dots (QDs) are grown on mesoporous TiO(2) films by 3 to 13 repeated cycles of in situ chemical bath deposition (CBD). The overall energy conversion efficiency of CdS quantum dot-sensitized solar cells (QD-SSCs) increases as the number of cycles increases to the eight - peaking at 2.13%. This is attributable to efficient light harvesting and charge-collection resulting from enhanced light absorption and faster charge transport. However a further increase of CBD cycles to thirteen reduces QD-SSCs performance, despite better light absorption in the long wavelengths. This is attributed to decreased charge-injection efficiency, which is due to reduced driving forces of carrier injection, increased trap-mediated recombination in the QDs, and hindered ion transport. (C) 2011 American Institute of Physics. [doi:10.1063/1.3624944]

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