Synthesis, structure, and optical properties of K(2.4)Ga(2.4)M(1.6)Q(8) (M = Si, Ge; Q = S, Se) crystals and glasses | |
He, Jianqiao1,2,3,4,5; Zhang, Xian3,4; Guo, Pan6; Cheng, Ye3,4; Zheng, Chong7; Huang, Fuqiang1,2,3,4 | |
刊名 | RSC ADVANCES
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2016 | |
卷号 | 6期号:80 |
英文摘要 | Four new compounds, K(2.4)Ga(2.4)M(1.6)Q(8) (M = Si, Ge; Q = S, Se), were successfully synthesized via a reactive flux method. All compounds crystallize in the tetragonal system of space group I4/mcm, and belong to the Tl2Se2 structure type (Pearson symbol t/16). The isostructural scaffold of the compounds feature [(Ga-0.6/M-0.4) Q(4/2)] one-dimensional chains separated by K+ ions. The chains are composed of edge-sharing [(Ga-0.6/M-0.4) Q(4/2)] tetrahedrons. Powder and glass samples were synthesized from solid state reactions with different annealing processes. The transport properties of crystalline K2.4Ga2.4Ge1.6S8 and K2.4Ga2.4Ge1.6Se8 were determined from optical absorption measurements to be wide band gap semiconductors (Eg = 3.5 eV for K2.4Ga2.4Ge1.6S8 and 2.7 eV for K2.4Ga2.4Ge1.6Se8). A red shift of the band gap energy in the glass samples was observed. K2.4Ga2.4Ge1.6S8 glass showed a wide transparent range from 0.6 mu m to 10 mu m and a high soften-temperature of 533 degrees C. First-principles calculations fitted well with the optical measurements, indicating that the Ge substitution is beneficial for narrowing the band gap. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Chemistry, Multidisciplinary |
研究领域[WOS] | Chemistry |
关键词[WOS] | CHALCOGENIDE GLASSES ; ELECTRONIC-STRUCTURE ; X-RAY ; GALLIUM ; X=I ; NA ; GA ; TE |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000382157700086 |
内容类型 | 期刊论文 |
源URL | [http://ir.sic.ac.cn/handle/331005/22024] ![]() |
专题 | 上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文 |
作者单位 | 1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai 200050, Peoples R China 3.Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, 202 Chengfu Rd, Beijing 100871, Peoples R China 4.Peking Univ, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, 202 Chengfu Rd, Beijing 100871, Peoples R China 5.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China 6.Beijing Computat Sci Res Ctr, Beijing 100094, Peoples R China 7.Northern Illinois Univ, Dept Chem & Biochem, De Kalb, IL 60115 USA |
推荐引用方式 GB/T 7714 | He, Jianqiao,Zhang, Xian,Guo, Pan,et al. Synthesis, structure, and optical properties of K(2.4)Ga(2.4)M(1.6)Q(8) (M = Si, Ge; Q = S, Se) crystals and glasses[J]. RSC ADVANCES,2016,6(80). |
APA | He, Jianqiao,Zhang, Xian,Guo, Pan,Cheng, Ye,Zheng, Chong,&Huang, Fuqiang.(2016).Synthesis, structure, and optical properties of K(2.4)Ga(2.4)M(1.6)Q(8) (M = Si, Ge; Q = S, Se) crystals and glasses.RSC ADVANCES,6(80). |
MLA | He, Jianqiao,et al."Synthesis, structure, and optical properties of K(2.4)Ga(2.4)M(1.6)Q(8) (M = Si, Ge; Q = S, Se) crystals and glasses".RSC ADVANCES 6.80(2016). |
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