| Автор | Pham, Thi Thuy |
| Автор | Chi Tran, Thi Kim |
| Автор | Nguyen, Quang Liem |
| Дата выпуска | 2011-06-01 |
| dc.description | This paper reports on the temperature-dependent photoluminescence of InP/ZnS quantum dots under 532 nm excitation, which is above the InP transition energy but well below that of ZnS. The overall photoluminescence spectra show two spectral components. The higher-energy one (named X) is assigned to originate from the excitonic transition; while the low-energy spectral component (named I) is normally interpreted as resulting from lattice imperfections in the crystalline structure of InP/ZnS quantum dots (QDs). Peak positions of both the X and I emissions vary similarly with increasing temperature and the same as the InP bandgap narrowing with temperature. In the temperature range from 15 to 80 K, the ratio of the integrated intensity from the X and the I emissions decreases gradually and then this ratio increases fast at temperatures higher than 80 K. This could result from a population of charge carriers in the lattice imperfection states at a temperature below 80 K to increase the I emission but then with these charge carriers being released to contribute to the X emission. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | 2011 Vietnam Academy of Science & Technology |
| Название | Temperature-dependent photoluminescence study of InP/ZnS quantum dots |
| Тип | paper |
| DOI | 10.1088/2043-6262/2/2/025001 |
| Electronic ISSN | 2043-6262 |
| Print ISSN | 2043-6254 |
| Журнал | Advances in Natural Sciences: Nanoscience and Nanotechnology |
| Том | 2 |
| Первая страница | 25001 |
| Последняя страница | 25004 |
| Аффилиация | Pham, Thi Thuy; Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam; Baria-Vungtau Commune College, National Road 51C, Dist 11, Vung Tau City, Vietnam |
| Аффилиация | Chi Tran, Thi Kim; Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam |
| Аффилиация | Nguyen, Quang Liem; Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam |
| Выпуск | 2 |
