以高纯(6N) Cd、Si、P单质为原料,按CdSiP2化学计量比并适当富磷配料,采用传统气相输运法合成出CdSiP2多晶.X射线衍射(XRD)分析及Rietveld全谱拟合精修结果表明合成产物中含有微量SiP和CdP2杂相,分析了杂相产生的原因.针对存在的问题改进合成工艺,引入高温熔体机械和温度振荡以及分步控温冷却等新工艺,获得了外观完整、内部致密均匀的CdSiP2多晶.XRD及能量色散谱仪(EDS)分析结果表明,合成产物为高纯单相CdSiP2多晶,为高质量单晶体的生长奠定了可靠基础.以改进工艺获得的CdSiP2多晶为原料生长出质量较好的单晶体,厚度为2mm的晶片样品在1500 ~ 7000 cm-1范围内的红外透过率在45%以上,计算出晶体的禁带宽度为2.09 eV.
参考文献
[1] | Abrahams S C;Bernstein J L .Luminescent Piezoelectric CdSiP2:Normal Probability Plot Analysis,Crystal Structure,and Generalized Structure of the AⅡBⅣC2Ⅴ Family[J].Journal of Chemical Physics,1971,55(02):796-803. |
[2] | Itoh N;Fujinaga T;Nakau T .Birefringence in CdSiP2[J].Japanese Journal of Applied Physics,1978,17(05):951-952. |
[3] | Schunemann P G;Zawilski K T;Pollak T M.New Mid-IR Nonlinear Optical Crystal:CdSiP2[A].San Jose,California,IEEE Conference Publications,2008:306-307. |
[4] | Growth and characterization of large CdSiP_2 single crystals[J].Journal of Crystal Growth,2010(8):p.1127. |
[5] | 董春明,王善朋,陶绪堂.中红外非线性光学晶体的研究进展[J].人工晶体学报,2006(04):785-789. |
[6] | Spring-Thorpe A J;Pamplin B R .Growth of Some Single Crystal Ⅱ-Ⅳ-Ⅴ2 Semiconducting Compounds[J].Journal of Crystal Growth,1968,3(04):313-316. |
[7] | Buehler E;Wernick J H .Concerning Growth of Single Crystal of the Ⅱ-Ⅳ-Ⅴ Diamond-Like Compounds ZnSiP2,CdSiP2,ZnGeP2,and CdSnP2 and Standard Enthalpies of Formation for ZnSiP2 and CdSiP2[J].Journal of Crystal Growth,1971,8(04):324-332. |
[8] | Guodong Zhang;Xutang Tao;Huapeng Ruan;Shanpeng Wang;Qiong Shi .Growth of CdSiP_2 single crystals by self-seeding vertical Bridgman method[J].Journal of Crystal Growth,2012(1):197-201. |
[9] | 梁敬魁.粉末衍射法测定晶体结构[M].北京:科学出版社,2003:776-813. |
[10] | 马礼敦.近代X射线多晶体衍射-实验技术与数据分析[M].北京:化学工业出版社,2004 |
[11] | 杨辉,朱世富,赵北君,陈宝军,何知宇,樊龙,刘光耀,王小元.CdSiP2多晶合成的热力学研究[J].人工晶体学报,2012(01):11-14,19. |
[12] | Vohl P .Synthesis and Crystal Growth of CdGeP2[J].Journal of Electronic Materials,1979,8(04):517-528. |
[13] | Long Fan;Shifu Zhu;Beijun Zhao;Baojun Chen;Zhiyu He;Hui Yang;Guangyao Liu .Synthesis of high-quality CdSiP_2 polycrystalline materials directly from the constituent elements[J].Journal of Crystal Growth,2012(1):228-231. |
[14] | 刘恩科;朱秉升;罗晋生.半导体物理学[M].北京:电子工业出版社,2008:315-319. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%