Favorable effects of titanium nitride or its thermally treated version in a gel electrolyte for a quasi-solid-state dye-sensitized solar cell

Lee, C.-P.C.-P.LeeLin, L.-Y.L.-Y.LinVittal, R.R.VittalHo, K.-C.K.-C.HoKUO-CHUAN HO2018-09-102018-09-102011http://www.scopus.com/inward/record.url?eid=2-s2.0-78049412878&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/363180Titanium nitride (TiN) or its thermally treated version is incorporated into the gel electrolyte of a dye-sensitized solar cell (DSSC) and the consequent effects are investigated in terms of photovoltaic performance of the cell. The gel electrolyte is essentially prepared by using poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP). With an addition of 3 wt% TiN, the solar-to-electricity conversion efficiency (η) of the DSSC reaches 5.33% from 4.15% of the cell without TiN. X-ray diffraction (XRD) spectra of thermally treated-TiN (tt-TiN) clearly shows the partial conversion of TiN into TiO2 with both anatase and rutile crystal phases. The DSSC with the incorporation of 3 wt% of tt-TiN into its electrolyte shows a further improved efficiency of 5.68%, with reference to the efficiency of TiN-incorporated DSSC. The cell with 3 wt% of tt-TiN also shows unfailing at-rest stability after more than 1000 h. Electrochemical impedance spectroscopy (EIS) is used to obtain charge transfer properties of the cells. Crystallinity and crystalline phases are analyzed by X-ray diffraction (XRD) spectra. Surface morphologies are observed with scanning electron microscopy (SEM). IPCE curves substantiate the variations in short circuit photocurrents. © 2010 Elsevier B.V. All rights reserved.At-rest stability; Dye-sensitized solar cell; Electrochemical impedance spectroscopy; Polymer gel electrolyte; Thermally treated titanium nitride[SDGs]SDG7At-rest stability; Dye-sensitized solar cell; Electrochemical impedance; Polymer gel electrolyte; Thermally treated titanium nitride; Charge transfer; Conversion efficiency; Diffraction; Electrochemical corrosion; Electrochemical impedance spectroscopy; Electrochemical properties; Electrolytes; Gels; Ion exchange; Metal analysis; Oxide minerals; Photoelectrochemical cells; Scanning electron microscopy; Solar cells; Solar power generation; Titanium; Titanium dioxide; X ray diffraction; Titanium nitrideFavorable effects of titanium nitride or its thermally treated version in a gel electrolyte for a quasi-solid-state dye-sensitized solar celljournal article10.1016/j.jpowsour.2010.08.039