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掺铜的硫化锌为一种重要的发光材料。其发光性能与晶体缺陷有密切关系。利用高分辨电子显微术可以直接观察晶体缺陷结构。硫化锌晶体结构有立方闪锌矿(Z)与六角纤锌矿(W)两种。图1是两种结构共生的高分辨象,分别用Z及W表示相应结构。两者的区别仅在于沿密排方向的原子排列规则不同:闪锌矿结构为ABCABC……(3 R)排列;而纤锌矿结构为ABAB……(2H)排列。象中每一个亮点代表由一个硫原子及一个锌原子组成的原子团。在掺铜的硫化锌晶体中,微孪晶的密度很大.如图2及图3(T)所示。孪晶面为(111)。图3中还有典型的扩展位错(S),位错的柏氏矢量为b=1/6[112]。此外,还观察到有4H、16H、12R、36R等多种长周期
Cu-doped zinc sulfide is an important luminescent material. Its luminescent properties and crystal defects are closely related. Using high resolution electron microscopy can directly observe the crystal defect structure. Zinc sulfide crystal structure of cubic sphalerite (Z) and hexagonal wurtzite (W) two. Figure 1 is a high-resolution image of two structures symbiotic, respectively, Z and W, respectively, that the corresponding structure. The difference between the two is that the atomic arrangement along the packed direction is different: the sphalerite structure is ABCABC (3 R) arrangement; and the wurtzite structure is ABAB (2H) arrangement. Each bright spot in the image represents an atomic group consisting of a sulfur atom and a zinc atom. In copper-doped zinc sulfide crystals, the density of micro-twins is high, as shown in Fig. 2 and Fig. 3 (T). The twinside plane is (111). Figure 3 also shows a typical extended dislocation (S), the dislocation of the Boolean vector b = 1/6 [112]. In addition, 4H, 16H, 12R, 36R and other long-period are also observed