Mg nanoparticles core-CdS QDs shell heterostructures with ZnS passivation layer for efficient quantum dot sensitized solar cell
| Autor: | Ali Reza Amani-Ghadim, Soheil Aber, Fatemeh Khodam |
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| Přispěvatelé: | Khodam, Fatemeh, Amani-Ghadim, Ali Reza, Aber, Soheil |
| Rok vydání: | 2019 |
| Předmět: |
CdS quantum dot
Materials science Photoluminescence magnesium nanoparticles Passivation General Chemical Engineering 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law Solar cell Electrochemistry passivation layer Photocurrent business.industry photoanode Heterojunction 021001 nanoscience & nanotechnology Zinc sulfide 0104 chemical sciences core-shell Solar cell efficiency chemistry Quantum dot Optoelectronics 0210 nano-technology business |
| Zdroj: | Electrochimica Acta. 308:25-34 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2019.03.228 |
| Popis: | A core-shell structure of Mg@CdS quantum dots (QDs) with ZnS passivation layer deposited on TiO₂ mesoporous film, denoted as TiO₂/Mg@CdS/ZnS, is fabricated as photoanode for enhancement of quantum dot sensitized solar cells efficiency. High resolution transmission electron microscope images and X-Ray photoelectron spectroscopy analysis confirm the core sell structure of Mg@CdS. Introduction of Mg nanoparticles in the photoanode indicates a rise in photovoltage and photocurrent density by decreasing the charge recombination and increasing the photon capturing ability indicated by photoluminescence and diffuse reflectance spectroscopy, respectively. TiO2/Mg@CdS signifies excellent charge injection and transfer efficiency in photoanode. Moreover, Zinc sulfide is utilized as the passivation layer to inhibit electron recombination between photoanode and electrolyte interface. The achieved power conversation efficiency of the TiO₂/Mg@CdS/3ZnS is 7.47% which is significantly higher than TiO₂/CdS (2.87%) and TiO₂/Mg@CdS (5.37%) photoanodes. Electrochemical impedance spectroscopy implies the higher charge recombination resistance between photoanode and electrolyte interface in solar cell fabricated using TiO₂/Mg@CdS/3ZnS photoanode. Refereed/Peer-reviewed |
| Databáze: | OpenAIRE |
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