(Zn,Cd)O thin films for the application in heterostructures: Structural and optical properties
(Zn,Cd)O thin films for the application in heterostructures: Structural and optical properties
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DOI：
10.1063/1.4766905
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发表时间：
2012-11
影响因子：
3.2
通讯作者：
M. Lange;C. Dietrich;K. Brachwitz;T. Böntgen;M. Lorenz;M. Grundmann
中科院分区：
文献类型：
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作者：
M. Lange;C. Dietrich;K. Brachwitz;T. Böntgen;M. Lorenz;M. Grundmann
报道了用脉冲激光沉积方法在Cd含量高达0.25的a面蓝宝石衬底上生长的(Zn，Cd)O薄膜。通过在氧化锌中掺入Cd，并施加约300℃的较低生长温度，由于Cd含量高达0.25，与(Zn，Cd)O相关的发光红移到2.46 eV。此外，透射率测量还证明了带隙能量的红移。通过对透射率曲线的拟合，计算了吸收系数谱和折射率谱。(Zn，Cd)O薄膜为单相，具有纤锌矿晶体结构。随着Cd含量的增加，a晶格常数和c晶格常数增大。
We report on (Zn,Cd)O thin films, grown by pulsed laser deposition on a-plane sapphire substrates with high Cd-contents up to 0.25. By incorporating Cd in ZnO and by applying a low growth temperature of about 300°C, the (Zn,Cd)O related luminescence redshifts to an energy of 2.46 eV as a result of the large Cd-content of 0.25. The redshift of the bandgap energy was additionally proven by transmission measurements. By fitting the transmission curves, the spectra of the absorption coefficient and the index of refraction are calculated. The (Zn,Cd)O thin films are single phase and exhibit the wurtzite crystal structure. An increasing a- and c-lattice constant is observed with increasing Cd-content.