Luminescent Cu doped CdTe nanocrystals via cation exchange of Cu7Te5 nanocubes: From undoped to doped emission
| Autor: | Meng Xu, Qiumei Di, Zhuoli Jiang, Jiaojiao Zheng, Jiatao Zhang, Bing Bai |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Photoluminescence
Materials science Dopant Band gap Doping Inorganic chemistry Cu-related emission Colloidal semiconductor nanocrystals Cation exchange 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cadmium telluride photovoltaics 0104 chemical sciences chemistry.chemical_compound chemistry Impurity Telluride TA401-492 General Materials Science 0210 nano-technology Luminescence Photoluminescence regulation Materials of engineering and construction. Mechanics of materials |
| Zdroj: | Progress in Natural Science: Materials International, Vol 31, Iss 3, Pp 398-403 (2021) |
| ISSN: | 1002-0071 |
| Popis: | In II-VI group, the doping in CdTe nanocrystals (NCs) is more difficult than other chalcogenides. In this communication, CdTe nanocrystals containing Cu impurities were carefully synthesized based on controlled reverse cation exchange process between as-prepared Cu7Te5 nanocubes and Cd2+ ions. By well-defined Cu7Te5 nanocubes, the obtained CdTe NCs kept the original morphology. The concentration of Cu impurities in CdTe NCs was controlled by the regulation such reverse cation exchange. Additionally, the regulation from band gap (BG) photoluminescence (PL) to the coexistence of the bandgap emission, dopant emission, and surface-state emission was realized. This tailoring from undoped to doped emission in the case of Cu impurities is helpful to study the Cu related doping in telluride NCs. |
| Databáze: | OpenAIRE |
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