Tailored near-infrared-emitting colloidal heterostructured quantum dots with enhanced visible light absorption for high performance photoelectrochemical cells
| Autor: | Ali Imran Channa, Peng Yu, Yongchen Liu, Haining Ji, Xiaobin Niu, Xin Tong, Zhiming Wang, Jing-Yin Xu, Changmeng Wang, Muhammad Naeem Sial |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Photocurrent
Materials science Renewable Energy Sustainability and the Environment business.industry Near-infrared spectroscopy 02 engineering and technology General Chemistry Photoelectrochemical cell 021001 nanoscience & nanotechnology Wavelength Quantum dot Optoelectronics General Materials Science 0210 nano-technology Absorption (electromagnetic radiation) business Visible spectrum Wurtzite crystal structure |
| Zdroj: | Journal of Materials Chemistry A. 7:10225-10230 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c9ta01052a |
| Popis: | Colloidal heterostructured CuGaS2 (CGS)/CdS core/shell quantum dots (QDs) with a wurtzite (WZ) phase were synthesized via a facile two-step technique. As compared to the bare CGS QDs, the optical properties of such heterostructured CGS/CdS core/shell QDs were tailored to show largely enhanced light absorption in the visible range and an emission peak in the near-infrared (NIR) region at a wavelength of ∼816 nm. As proof of concept, these core/shell QDs were used as light absorbers to fabricate a photoelectrochemical (PEC) cell, which exhibited a maximum saturated photocurrent density of ∼6.5 mA cm−2 and outstanding stability under standard one sun illumination (AM 1.5G, 100 mW cm−2). The results indicate that these NIR core/shell QDs are promising candidates for future QD-based optoelectronic technologies such as QD-sensitized solar cells (QDSCs). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|