https://scholars.lib.ntu.edu.tw/handle/123456789/407383
標題: | Synthesis and characterization of copper gallium diselenide powders prepared from the sol-gel derived precursors | 作者: | Liu Z.-L. Chen F.-S. Lu C.-H. |
關鍵字: | A. Sol-gel processes;Chalcopyrite;CuGaSe2 | 公開日期: | 2013 | 卷: | 39 | 期: | 8 | 起(迄)頁: | 8641-8647 | 來源出版物: | Ceramics International | 摘要: | Copper gallium diselenide (CuGaSe2) powders were synthesized via the sol-gel method followed by a selenization process. The sol-gel process can effectively reduce the required synthesis temperature to 400 C due to enhanced reactivity and improved composition homogeneity. The amount of Cu2Se impurity phase was decreased when sufficient Ga3+ was added to the precursors. CuGaSe2 powders were successfully prepared when the Ga3+/Cu2+ molar ratio was increased to 2. The formation of CuGaSe2 with a pure chalcopyrite structure was confirmed via the Rietveld refinement analysis. With decreasing Ga3+/Cu2+ molar ratios, the particle size of the prepared CuGaSe2 powders was significantly enlarged because the copper selenide phase acted as a flux for the particle growth. The optical absorption spectra revealed the obtained CuGaSe2 to have a band gap of 1.68 eV. The sol-gel method combined with the selenization process was demonstrated to provide a potential approach for fabricating CuGaSe2 materials. ? 2013 Elsevier Ltd and Techna Group S.r.l. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407383 | ISSN: | 02728842 | DOI: | 10.1016/j.ceramint.2013.04.042 |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。