Abstract
Herein, femtosecond photoluminescence up-conversion (u-PL) spectroscopy has been carried out to elucidate charge carrier relaxation dynamics of the hole in 2 nm copper doped CdS (Cu:CdS) QDs. The hole capturing time at the Cu defect state from the valance band edge of the CdS host appeared significantly faster (437 fs) compared to pure CdS QDs (670 fs). This faster hole capturing in Cu:CdS QDs can compete with Auger-type cooling, and consequently, we can expect slower electron cooling in this system.
| Original language | English |
|---|---|
| Article number | 129925 |
| Journal | Materials Letters |
| Volume | 297 |
| DOIs | |
| State | Published - 15 Aug 2021 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021 Elsevier B.V.
Funding
We wish to acknowledge the Science and Engineering Research Board , Govt. of India, for a research grant (Project no. EEQ/2016/000652 ). We are grateful to AIRF-JNU for PL up-conversion, TCSPC, and TEM measurements. ANY is thankful to UGC for the JRF fellowship. We wish to acknowledge the Science and Engineering Research Board, Govt. of India, for a research grant (Project no. EEQ/2016/000652). We are grateful to AIRF-JNU for PL up-conversion, TCSPC, and TEM measurements. ANY is thankful to UGC for the JRF fellowship.
| Funders | Funder number |
|---|---|
| AIRF-JNU | |
| University Grants Committee | |
| Science and Engineering Research Board | EEQ/2016/000652 |
Keywords
- Luminescence
- Nanoparticles
- Semiconductors
- Spectroscopy