標題: | Epitaxial Growth of ZnGa2O4: A New, Deep Ultraviolet Semiconductor Candidate |
作者: | Huang, Ray-Hua Huang, Chiung-Yi Ou, Sin-Liang Juang, Tzu-Kuang Liu, Po-Liang 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics |
公開日期: | 1-十一月-2017 |
摘要: | ZnGaO films were grown on c-plane sapphire substrates by metal organic chemical vapor deposition using diethylzinc (DEZn), triethylgallium (TEGa), and oxygen. The flow rate of DEZn was 10-60 sccm, and those of TEGa and oxygen were held constant. The ZnGaO film prepared at a DEZn flow rate of 10 sccm adopted a ((2) over bar 01)-oriented single-crystalline beta-Ga2O3 phase, whereas those prepared at 30-60 sccm exhibited a (111)-oriented single-crystalline ZnGa2O4 phase. On the basis of Hall measurements, ZnGaO films (10 sccm DEZn) possessed very poor electrical properties, which were similar to those of beta-Ga2O3. On the other hand, the carrier concentration in ZnGaO films increased from 1.94 X 10(14) to 6.72 X 10(16) cm(-3), and the resistivity decreased from 5730 to 67.9 Omega-cm when increasing the DEZn flow rate from 30 to 60 sccm. According to compositional analyses, the improved electrical properties of ZnGaO films upon increasing DEZn flow rate from 30 to 40 sccm are due to the increasing Zn content, and the enhancement from 50 to 60 sccm could be due to increased C content. Cathodoluminescence results also confirm the ZnGa2O4 structure for ZnGaO films prepared at DEZn flow rates of 30-60 sccm and reveal their use for ultraviolet applications. |
URI: | http://dx.doi.org/10.1021/acs.cgd.7b01159 http://hdl.handle.net/11536/144037 |
ISSN: | 1528-7483 |
DOI: | 10.1021/acs.cgd.7b01159 |
期刊: | CRYSTAL GROWTH & DESIGN |
Volume: | 17 |
起始頁: | 6071 |
結束頁: | 6078 |
顯示於類別: | 期刊論文 |