Open AccessEffect of Mg Doping on SnO2 Energy Band and Power Conversion Efficiency of Dye-Sensitized Solar Cells
Author(s) -
Hao Yang,
Hong-Tao Fan,
Junhong Duan
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2101/1/012066
Subject(s) - dye sensitized solar cell , doping , energy conversion efficiency , dielectric spectroscopy , materials science , band gap , open circuit voltage , photovoltaic system , analytical chemistry (journal) , optoelectronics , electrochemistry , hydrothermal circulation , voltage , chemistry , chemical engineering , electrode , electrolyte , electrical engineering , chromatography , engineering
In this work, Mg-doped SnO 2 materials with different molar ratios were synthesized by hydrothermal method. Based on the UV-Vis study, band gap ( E g) of the Mg-doped SnO 2 is adjusted from 3.76 eV to 3.65 eV via 3 at% concentrations. Results of photovoltaic measurement for dye-sensitized solar cells (DSCs) based on Mg-doped SnO 2 film as photoanode indicate that the doping of Mg ions can improve the open-circuit voltage ( V oc ) of the DSCs, while the electric current density ( J sc ) of the DSCs is almost unchanged. The cells were measured at 3 days intervals within 24 days after fabrication. Power conversion efficiency (PCE) of 3 at% Mg-doped SnO 2 DSCs increases step by step and achieves 4.38% as the cell is tested after 18 days. Electrochemical impedance spectroscopy (EIS) analysis shows that Mg doping enhances light collection, increased the number of photogenerated electrons and inhibits charge recombination.