- Turkish Journal of Physics
- Vol: 41 Issue: 2
- Role of Mg doping in the structural, optical, and electrical characteristics of ZnO-based DSSCs
Role of Mg doping in the structural, optical, and electrical characteristics of ZnO-based DSSCs
Authors : Ismail Polat, Salih Yilmaz, Murat Tomakin, Emin Bacaksiz
Pages : 160-170
View : 13 | Download : 10
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :ZnO- and Mg-doped ZnO samples are prepared by spray pyrolysis on conducting glass substrates to fabricate ZnO-based dye-sensitized solar cells (DSSCs). Influences of Mg-doping content on the power conversion efficiencies of ZnO-based DSSCs are investigated. X-ray diffraction results show that all the samples exhibit a hexagonal wurtzite structure. Scanning electron microscopy data indicate that the ZnO sample has uniform rods with 1 $\mu $m diameter. With respect to ZnO, the band gap value of 4 at.% Mg-doped ZnO samples improves to the value of 3.27 eV and a further increase in Mg level up to 6 at.% gives rise to a decline in the band gap value of 3.22 eV. Photoluminescence measurements illustrate that intensities of the ultraviolet peak and a red luminescence peak take their maximum values for 4 at.% Mg doping. From solar cell performance measurements, the best power conversion efficiency of 0.08% is obtained for the doping amount of 4 at.% Mg.Keywords : Mg-doped ZnO, rods, spray pyrolysis, dye-sensitized solar cells