Electronic Resource
Improvement of luminescence properties of n-GaN using TEGa precursor
| العنوان: | Improvement of luminescence properties of n-GaN using TEGa precursor |
|---|---|
| المؤلفون: | Hubáčeka, T., Hospodková, A., Kuldová, K., Slavická Zíková, M., Pangrác, J., Čížek, J., (0000-0001-7933-7295) Liedke, M. O., (0000-0003-3674-0767) Butterling, M., (0000-0001-7575-3961) Wagner, A., Hubík, P., Hulicius, E. |
| المصدر: | Journal of Crystal Growth 531(2020), 125383 |
| بيانات النشر: | 2020 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | The aim of this work is to compare and improve optical and structural properties of GaN layers prepared using TMGa or TEGa precursors. MOVPE grown GaN buffer layers on sapphire substrates are usually grown from TMGa precursor at the temperatures above 1000 °C. These layers contain deep and shallow acceptor levels which are responsible for blue and yellow defect bands in luminescent spectra. Both defect bands are detrimental for all major nitride device applications. Especially n-doped GaN layers suffer from strong yellow defect bands. In this work, it is shown that yellow band photoluminescence intensity can be suppressed by using TEGa precursor during the growth of n–doped GaN layers. Different kinds of growth parameters, such as growth temperature or growth rate, have been studied. It is also shown that the change of carrier gas (H2 or N2) has very strong influence on the layer quality. H2 carrier gas increased intensity of yellow band in sample grown from TEGa precursor while N2 carrier gas had the same effect for sample grown from TMGa precursor. Variable energy positron annihilation spectroscopy showed creation of single VGa in H2 atmosphere and clustering of VGa to big complexes ((VGa)3(VN)n) in N2 atmosphere. |
| مصطلحات الفهرس: | MOVPE, TEGa precursor, n-GaN, yellow band, VGa defect, info:eu-repo/semantics/publishedVersion, doc-type:article, Text |
| URL: | info:eu-repo/semantics/reference/doi/10.1016/j.jcrysgro.2019.125383 info:eu-repo/semantics/altIdentifier/purl/https://www.hzdr.de/publications/Publ-30073-1 |
| الاتاحة: | Open access content. Open access content Restricted Access |
| ملاحظة: | application/pdf English |
| Other Numbers: | DERBS HZDR:PUBLDB:30073-1 1415626060 |
| المصدر المساهم: | ROBIS REPOSITORY From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1415626060 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |