Preparation of Multistage Sheet-cluster ZnO Photoanode via a Solid State Reaction and Its Property in DSSCs

doi:10.1007/s40242-016-5439-5

Abstract

Abstract:

Different precursors were prepared via a simple low heat solid state reaction(LHSSR) upon changing the ligands. The ZnO photoanode films were obtained by the doctor blade technique, and their composition, thermal decomposition process and morphologies were identified by means of X-ray diffraction(XRD), thermal gravimetric analysis-differential thermal analysis(TGA-SDTA) and scanning electron microscope(SEM). The results show that the morphologies of ZnO photoanodes are irregular block, regular lamellar and irregular sheet-cluster, and the multistage structure can be found in all the photoanodes. Furthermore, there exists a genetic effect of morphology between the precursors and the corresponding photoanodes. The optimum power conversion efficiency of the sheet-cluster ZnO photoanode was 3.12% with the short circuit current density(J_sc) being 11.23 mA/cm². The multi- stage sheet-cluster structure could result in the increase of the scattering of the incident light and provide a rapid electronic transmission channel to reduce the risk of electronic recombination. A beneficial enlightenment was obtained to simplify the process and the photoanode films with various morphologies can be prepared with lower price in the further research.

Key words: Solid state reaction, Sheet-cluster structure, ZnO, Photoanode, Dye sensitized solar cell(DSSC)

WEN Qiuxiang, DONG Lin, SUN Xiaoyong, ZHUANG Jia, CHEN Zemin. Preparation of Multistage Sheet-cluster ZnO Photoanode via a Solid State Reaction and Its Property in DSSCs[J]. Chemical Research in Chinese Universities, 2016, 32(3): 437-442.

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