987 resultados para 100


Relevância:

20.00% 20.00%

Publicador:

Resumo:

Single crystalline 3C-SiC epitaxial layers are grown on φ50mm Si wafers by a new resistively heated CVD/LPCVD system, using SiH_4, C_2H_4 and H_2 as gas precursors. X-ray diffraction and Raman scattering measurements are used to investigate the crystallinity of the grown films. Electrical properties of the epitaxial 3C-SiC layers with thickness of 1 ~ 3μm are measured by Van der Pauw method. The improved Hall mobility reaches the highest value of 470cm~2/(V·s) at the carrier concentration of 7.7 * 10~(17)cm~(-3).

Relevância:

20.00% 20.00%

Publicador:

Resumo:

利用MOCVD生长技术在GaAs(100)衬底上生长了高质量的立方相AlGaN薄膜。通过光致发光(PL)、扫描电镜(SEM)分析了不同NH_3流量、不同生长温度对AlGaN外延层的结晶质量和表面形貌的影响。发现相对高的NH_3流量和相对高的生长温度可以提高AlGaN外延层的结晶质量。

Relevância:

20.00% 20.00%

Publicador:

Resumo:

室温下在p-Si(100)上采用直流反应磁控溅射法外延生长了ZnO薄膜。XRD测量表明了ZnO是高度c轴单一取向生长的,XRC测量则表明了ZnO的高质量。在室温下的PL测量中见到了带边发射,其强度与晶体质量有关。

Relevância:

20.00% 20.00%

Publicador:

Resumo:

于2010-11-23批量导入

Relevância:

20.00% 20.00%

Publicador:

Resumo:

于2010-11-23批量导入

Relevância:

20.00% 20.00%

Publicador:

Relevância:

20.00% 20.00%

Publicador:

Resumo:

于2010-11-23批量导入

Relevância:

20.00% 20.00%

Publicador:

Resumo:

国家计委八五计划,国家计委九五计划

Relevância:

20.00% 20.00%

Publicador:

Resumo:

采用含有过量硫的(NH_4)_2S_x对InP(100)表面进行化学钝化和辉光放电电子束辐照处理,液氮下光致发光强度比未辐射的光致发光强度提高了1.5倍,比未钝化的提高了5倍.利用X射线光电子谱研究了电子辐照对InP表面硫钝化的影响.结果表明,硫钝化InP表面经电子束辐照可以促使S与InP更好的化合.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

于2010-11-23批量导入

Relevância:

20.00% 20.00%

Publicador:

Resumo:

于2010-11-23批量导入

Relevância:

20.00% 20.00%

Publicador:

Resumo:

国家自然科学基金

Relevância:

20.00% 20.00%

Publicador:

Resumo:

用XPS和UPS研究了氧在Rb复盖的和清洁的InP(100)表面的吸附行为。实验结果表明,碱金属可以使衬底的氧化能力大大增加。在氧的暴露量低于1L时,氧主要吸附在碱金属原子之间的InP衬底上,且位于Rb原子层之下。当氧暴露量增加时,氧主要还是吸附在Rb覆盖层下面,这时衬底开始氧化。在清洁表面,氧主要吸附在In原子上,样品退火后,Rb部分脱附,同时,衬底的氧化物相(InPO_4)含量增加。

Relevância:

20.00% 20.00%

Publicador:

Resumo:

于2010-11-23批量导入