Two-dimensional dichalcogenides for light-harvesting applications
| Autor: | Kian Ping Loh, Priscilla Kailian Ang, Bo Peng |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
business.industry Photovoltaic system Biomedical Engineering Pharmaceutical Science Bioengineering Nanotechnology Heterojunction Optical conductivity law.invention law Solar cell Photocatalysis Optoelectronics Energy transformation General Materials Science Direct and indirect band gaps business Broadband absorption Biotechnology |
| Zdroj: | Nano Today. 10:128-137 |
| ISSN: | 1748-0132 |
| DOI: | 10.1016/j.nantod.2015.01.007 |
| Popis: | Summary Two-dimensional transition metal dichalcogenides (2-D TMDCs) have unique band structures and show much promise for photochemical and photovoltaic applications. This review focuses on the latest 2-D TMDC researches relating to their use in next-generation ultrathin solar cell and photocatalytic systems. The fundamental properties that give rise to the high optical conductivity of 2-D TMDCs are discussed. The short optical absorption path in 2-D systems limits their use in light-harvesting applications, and various strategies to address this limitation are considered. For example, 2-D TMDCs can be stacked to form an energy-cascade-type solar cell with broadband absorption across the solar spectrum. By combining various heterostructures, the energy offset at the interface can be tuned to achieve efficient separation of photoexcited electron-hole pairs and create a direct band gap. Solution-processed chemistry can be used to synthesise foam-like, porous, interconnected TMDC networks which can provide efficient light harvesting and energy conversion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect