Improved Power Conversion Efficiency of Dye-Sensitized Solar Cells Assisted with phosphor materials Scattering layer

  • Lee, Yong-Min (Department of Chemistry, Sungkyunkwan University) ;
  • Choi, Hyun Ji (Institute of Basic Science, Sungkyunkwan University) ;
  • Kim, Dong In (Department of Chemistry, Sungkyunkwan University) ;
  • Lee, Yul Hee (Department of Chemistry, Sungkyunkwan University) ;
  • Yu, Jung-Hoon (Department of Chemistry, Sungkyunkwan University) ;
  • Kim, Jee Yun (Institute of Basic Science, Sungkyunkwan University) ;
  • Seo, Hyeon Jin (Department of Chemistry, Sungkyunkwan University) ;
  • Hwang, Ki-Hwan (Institute of Basic Science, Sungkyunkwan University) ;
  • Nam, Sang Hun (Institute of Basic Science, Sungkyunkwan University) ;
  • Boo, Jin-Hyo (Department of Chemistry, Sungkyunkwan University)
  • Published : 2016.02.17

Abstract

Theoretically, the dye-sensitized solar cells (DSSCs) are high efficiency solar cells. However DSSCs have low power conversion efficiency (PCE) than silicon based solar cells. In this study, we use the phosphor materials, such as $Y_2O_3:Eu$ (Red), $Zn_2SiO_4:Mn$ (Green), $BaMgAl_{14}O_{23}:Eu$ (Blue), to enhance the PCE of DSSCs. Three phosphors were prepared and used as an effective scattering layer on the transparent $TiO_2$ with doctor blade method. We confirmed that the three scattering layers improve the PCE and Jsc due to the light harvesting enhancement via increased the scattering and absorbance in visible range. Under the sun illumination AM 1.5 conditions, the PCE of the mesoporous $TiO_2$ based DSSCs is 5.18 %. The PCE of the DSSCs with Y2O3:Eu, $Zn_2SiO_4:Mn$ and $BaMgAl_{14}O_{23}:Eu$ as scattering layer were enhanced to 5.66 %, 5.72% and 5.82%, respectably. In order to compare the optical properties change, DSSCs were measured by EQE, reflectance and PCE. At the same time, FE-SEM and XRD were used to confirm the structural changes of each layer.

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