Cu-doped ZnO nanoporous film for improved performance of CdS/CdSe quantum dot-sensitized solar cells

Myeong Soo Jeong, Minkyu Son, Soo Kyoung Kim, Songyi Park, Kandasamy Prabakar, Hee Je Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Copper (Cu) doped zinc oxide (ZnO) powders were synthesized by co-precipitation method with different at% (0 and 0.5 at%) of Cu dopant. Cu-doped ZnO nanoporous (NP) films were fabricated to enhance the performance of the ZnO based cadmium sulfide (CdS) and cadmium selenide (CdSe) quantum dot-sensitized solar cells (QDSSCs). The existence of Cu ions in the Cu-doped ZnO NP film was detected by X-ray fluorescence. The surface morphology, microstructure and crystal structure of Cu-doped ZnO NP films were analyzed by scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The optical property of CdS/CdSe co-sensitized Cu-doped ZnO NP film was studied by UV-vis absorption spectroscopy. The photovoltaic performance and electrical property of Cu-doped ZnO CdS/CdSe QDSSCs were studied by current-voltage characteristic curves and electrochemical impedance spectroscopy under air mass 1.5 condition. As a result, short circuit current density and fill factor increased from 9.074 mA/cm2 and 0.403 to 9.865 mA/cm2 and 0.427 respectively, based on the enhanced absorbance and electron transport by Cu-doping. This led to the increasing light conversion efficiency from 2.27% to 2.61%.

Original languageEnglish
Pages (from-to)310-314
Number of pages5
JournalThin Solid Films
Volume570
Issue numberPB
DOIs
Publication statusPublished - Nov 3 2014
Externally publishedYes

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Zinc Oxide
cadmium selenides
Cadmium sulfide
cadmium sulfides
Zinc oxide
zinc oxides
Cadmium
Semiconductor quantum dots
Oxide films
oxide films
Solar cells
solar cells
quantum dots
Doping (additives)
air masses
Current voltage characteristics
short circuit currents
Coprecipitation
cadmium selenide
cadmium sulfide

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Cu-doped ZnO nanoporous film for improved performance of CdS/CdSe quantum dot-sensitized solar cells. / Jeong, Myeong Soo; Son, Minkyu; Kim, Soo Kyoung; Park, Songyi; Prabakar, Kandasamy; Kim, Hee Je.

In: Thin Solid Films, Vol. 570, No. PB, 03.11.2014, p. 310-314.

Research output: Contribution to journalArticle

Jeong, Myeong Soo ; Son, Minkyu ; Kim, Soo Kyoung ; Park, Songyi ; Prabakar, Kandasamy ; Kim, Hee Je. / Cu-doped ZnO nanoporous film for improved performance of CdS/CdSe quantum dot-sensitized solar cells. In: Thin Solid Films. 2014 ; Vol. 570, No. PB. pp. 310-314.
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