| 초록 |
Unlike in other solar cells, in dye–sensitized solar cells (DSSCs), an electron–transporting TiO2 layer is in direct contact with the hole conductor (electrolyte), inducing interfacial charge recombination between the photoinjected electrons and ions in the electrolyte. To reduce interfacial charge recombination between photoinjected electrons and triiodide ions in an electrolyte, TiO2 films were modified via a dip–coating process using an aqueous MgSO4 solution. The modified TiO2 films were applied to the photoelectrodes of the DSSCs. The DSSC with the Mg2+–TiO2/FTO layer showed increased values of Voc, Jsc, and FF, resulting in a PCE of 7.79% (Voc = 694 mV, Jsc = 16.03 mA/cm2, and FF = 70.10%), which was greater than that of the reference device with bare TiO2/FTO (PCE = 7.29%, Voc = 692 mV, Jsc = 15.47 mA/cm2, and FF = 68.16%). |
