000185977 001__ 185977
000185977 005__ 20181203023114.0
000185977 0247_ $$2doi$$a10.1039/c3ta01581e
000185977 022__ $$a2050-7488
000185977 02470 $$2ISI$$a000315720000029
000185977 037__ $$aARTICLE
000185977 245__ $$aInvestigation of the role of anions in hydrotalcite for quasi-solid state dye-sensitized solar cells application
000185977 260__ $$aCambridge$$bRoyal Society of Chemistry$$c2013
000185977 269__ $$a2013
000185977 300__ $$a7
000185977 336__ $$aJournal Articles
000185977 520__ $$aIn recent research in clean energy applications, clay has gained significant interest, especially as a gelator in dye-sensitized solar cells (DSSCs), for its capability to resolve the leakage issue of liquid electrolyte. In this paper, anionic hydrotalcite is utilized as a gelator to assist the formation of gel electrolyte in DSSCs. Three types of hydrotalcite with exchangeable anions, viz. NO3- (CL-N), CO32- (CL-C) and SO42- (CL-S), were synthesized with similar morphologies via the co-precipitation method. It is observed that the gel formation of hydrotalcite strongly depends on the exchangeable anions present in the hydrotalcite. The objective of this work is to understand the effect of hydrotalcite anions on the photovoltage and the photocurrent in the gel electrolyte through electrochemical analysis. With increasing ion affinity, the V-oc increases. This is attributed to Li+ intercalation with hydrotalcite compound resulting in the elevation of the conduction band of TiO2. With increasing ion affinity, the J(sc) decreases. This is attributed to the decreasing diffusion coefficient of triiodide and the increasing difficulty in the injection process. For anions with low ion affinity in hydrotalcite, the diffusion of the redox couple is not significantly affected by the high viscosity of the gel. Furthermore, the study indicates that proper selection of hydrotalcite compounds not only produces a quasi-solid gel electrolyte, but also increases the efficiency of the solar cells: the device performance was improved from 7.8% (liquid electrolyte) to 8.4% (hydrotalcite gel electrolyte).
000185977 700__ $$aWang, Xiu$$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
000185977 700__ $$aDeng, Ran$$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
000185977 700__ $$aKulkarni, Sneha A.$$uNanyang Technol Univ, Energy Res Inst NTU ERI N, Singapore 637553, Singapore
000185977 700__ $$aWang, Xiaoyan$$uNanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
000185977 700__ $$aPramana, Stevin Snellius$$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
000185977 700__ $$aWong, Chee Cheong$$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
000185977 700__ $$0240191$$aGraetzel, Michael$$g105292$$uNanyang Technol Univ, Ctr Nanostruct Photosyst CNPS, Singapore 637553, Singapore
000185977 700__ $$aUchida, Satoshi
000185977 700__ $$aMhaisalkar, Subodh G.$$uNanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
000185977 773__ $$j1$$k13$$q4345-4351$$tJournal Of Materials Chemistry A
000185977 909C0 $$0252060$$pLPI$$xU10101
000185977 909CO $$ooai:infoscience.tind.io:185977$$pSB$$particle
000185977 917Z8 $$x105528
000185977 937__ $$aEPFL-ARTICLE-185977
000185977 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000185977 980__ $$aARTICLE