In Situ Photoluminescence of Colloidal Quantum Dots During Gas Exposure—The Role of Water and Reactive Atomic Layer Deposition Precursors
| Autor: | Zeger Hens, Natalia Klaudia Zawacka, Jakob Kuhs, Emile Drijvers, Andreas Werbrouck, Philippe Smet, Christophe Detavernier |
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| Rok vydání: | 2019 |
| Předmět: |
In situ
Photoluminescence Materials science Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Host material Atomic layer deposition General Materials Science Colloidal quantum dots 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 11:26277-26287 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.9b08259 |
| Popis: | Colloidal quantum dots (QDs) are a promising material for optoelectronic applications. Typically, device integration requires QDs to be embedded in a host material. Atomic layer deposition (ALD) is often considered as a deposition technique for such purposes. However, it is known that ALD and vacuum processes often influence the optical properties of QDs in a negative way. Here, we describe an in situ photoluminescence (PL) measurement setup and use it to monitor the PL of QDs under vacuum and during ALD. For CdSe-based core/shell QDs, a reduction in the QD PL was observed upon exposure to vacuum. Water was identified as crucial for maintaining a high PL as evidenced by re-exposure to different gases. Furthermore, we addressed the influence of vacuum, different plasmas (O |
| Databáze: | OpenAIRE |
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