کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8208379 | 1532057 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature-dependent thermal behavior of impurity hydrogen trapped in vacancy-type defects in single crystal ZnO
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Interacting nature between impurity hydrogen atoms and vacancy-type defects in single crystal ZnO was investigated by means of positron annihilation lifetime spectroscopy. In order to clarify the observation of their thermal behavior, the sample was implanted with 1H+ using an electrostatic accelerator. After the implantation, the positron lifetime became shorter, which suggests that the hydrogen atoms were captured by zinc vacancies (VZn) to form vacancy-hydrogen complexes (VZn +â¯nH). The complexes decompose by heat treatment: most of the hydrogen atoms gradually dissociate from VZn +â¯nH in the temperature range 393-773â¯K. It was also suggested that large vacancy clusters were formed by the agglomeration of smaller clusters during the process of stepwise isochronal annealings at temperatures from 773 to 1073â¯K, and their decomposition took place at 1173-1373â¯K. Temperature-dependent thermal behaviors of hydrogen atoms and vacancy-type defects in ZnO are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Radiation and Isotopes - Volume 140, October 2018, Pages 224-227
Journal: Applied Radiation and Isotopes - Volume 140, October 2018, Pages 224-227
نویسندگان
H. Shimizu, W. Sato, M. Mihara, T. Fujisawa, M. Fukuda, K. Matsuta,