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Chelation of Zn cations as a method for their replacement by Mn, Fe, Co in ZnSe nanocrystalsстатья Исследовательская статья
- Авторы: Bubenov Sergei S., Vinokurov Alexander A., Daurenbekov Dulat H., Dorofeev Sergey G., Cherednichenko Kirill A., Kainarbay Asset Zh, Nurakhmetov Turlybek N.
- Журнал: Physica Status Solidi (A) Applications and Materials Science
- Том: 220
- Номер: 1
- Год издания: 2023
- Издательство: Wiley - V C H Verlag GmbbH & Co.
- Местоположение издательства: Germany
- Первая страница: 1
- Последняя страница: 6
- Номер статьи: 2200556
- DOI: 10.1002/pssa.202200556
- Аннотация: The article is dedicated to the description of a new technique for post-synthetic doping/alloying of Mn into ZnSe nanocrystals. The key feature is that it employs diethyldithiocarbamate anion to selectively bind the host cations and promote ion exchange. Presence of Mn in the product is confirmed with PL and TXRF spectroscopy. The cation exchange reaction takes place at temperatures as low as 100 °C. Higher temperatures allow to incorporate the impurity in greater quantities, however, after a crossover temperature of ∽200 °C the process gets convoluted with Ostwald ripening and sulfide deposition, as evident from electron diffraction data, HR TEM and elemental analysis of the samples. Studies of PL lifetime and quantum yield confirm these findings. Preliminary success is also shown for other impurities: Fe and Co are present in the respective samples in ∽17% at. of total metal content.
- Добавил в систему: Винокуров Александр Александрович