| 2021. |
|
|
| 2022. |
|
|
| 2023. |
- Wei, C., et al.
(författare)
-
A Universal Ternary-Solvent-Ink Strategy toward Efficient Inkjet-Printed Perovskite Quantum Dot Light-Emitting Diodes
- 2022
-
Ingår i: Advanced Materials. - : Wiley. - 0935-9648 .- 1521-4095. ; 34:10, s. 2107798-
-
Tidskriftsartikel (refereegranskat)abstract
- Toward next-generation electroluminescent quantum dot (QD) displays, inkjet printing technique has been convinced as one of the most promising low-cost and large-scale manufacturing of patterned quantum dot light-emitting diodes (QLEDs). The development of high-quality and stable QD inks is a key step to push this technology toward practical applications. Herein, a universal ternary-solvent-ink strategy is proposed for the cesium lead halides (CsPbX3) perovskite QDs and their corresponding inkjet-printed QLEDs. With this tailor-made ternary halogen-free solvent (naphthene, n-tridecane, and n-nonane) recipe, a highly dispersive and stable CsPbX3 QD ink is obtained, which exhibits much better printability and film-forming ability than that of the binary solvent (naphthene and n-tridecane) system, leading to a much better qualitied perovskite QD thin film. Consequently, a record peak external quantum efficiency (EQE) of 8.54% and maximum luminance of 43 883.39 cd m−2 is achieved in inkjet-printed green perovskite QLEDs, which is much higher than that of the binary-solvent-system-based devices (EQE = 2.26%). Moreover, the ternary-solvent-system exhibits a universal applicability in the inkjet-printed red and blue perovskite QLEDs as well as cadmium (Cd)-based QLEDs. This work demonstrates a new strategy for tailor-making a general ternary-solvent-QD-ink system for efficient inkjet-printed QLEDs as well as the other solution-processed electronic devices in the future.
|
|
| 2024. |
- Weltman, A., et al.
(författare)
-
Fundamental physics with the Square Kilometre Array
- 2020
-
Ingår i: Publications Astronomical Society of Australia. - : CAMBRIDGE UNIV PRESS. - 1323-3580 .- 1448-6083. ; 37
-
Forskningsöversikt (refereegranskat)abstract
- The Square Kilometre Array (SKA) is a planned large radio interferometer designed to operate over a wide range of frequencies, and with an order of magnitude greater sensitivity and survey speed than any current radio telescope. The SKA will address many important topics in astronomy, ranging from planet formation to distant galaxies. However, in this work, we consider the perspective of the SKA as a facility for studying physics. We review four areas in which the SKA is expected to make major contributions to our understanding of fundamental physics: cosmic dawn and reionisation; gravity and gravitational radiation; cosmology and dark energy; and dark matter and astroparticle physics. These discussions demonstrate that the SKA will be a spectacular physics machine, which will provide many new breakthroughs and novel insights on matter, energy, and spacetime.
|
|
| 2025. |
|
|
| 2026. |
|
|
| 2027. |
- Wu, X. Y., et al.
(författare)
-
Effect of rapid thermal annealing on InP1-xBix grown by molecular beam epitaxy
- 2015
-
Ingår i: Semiconductor Science and Technology. - : IOP Publishing. - 1361-6641 .- 0268-1242. ; 30:9
-
Tidskriftsartikel (refereegranskat)abstract
- The effect of post-growth rapid thermal annealing on structural and optical properties of InP1-xBix thin films was investigated. InPBi shows good thermal stability up to 500 °C and a modest improvement in photoluminescence (PL) intensity with an unchanged PL spectral feature. Bismuth outdiffusion from InPBi and strain relaxation are observed at about 600 °C. The InPBi sample annealed at 800 °C shows an unexpected PL spectrum with different energy transitions.
|
|
| 2028. |
- Xiang, D. F., et al.
(författare)
-
Apatite U-Pb Dating with Common Pb Correction Using LA-ICP-MS/MS
- 2021
-
Ingår i: Geostandards and Geoanalytical Research. - : Wiley. - 1639-4488 .- 1751-908X. ; 45:4, s. 621-642
-
Tidskriftsartikel (refereegranskat)abstract
- Apatite is a ubiquitous accessory mineral in various rocks (e.g., igneous, metamorphic and clastic sedimentary rocks). However, precise and accurate U-Pb LA-ICP-MS dating of apatite is often compromised by high common Pb levels. Among the different common Pb correction methods, the main advantage of the Pb-204 correction method is that it does not assume U/radiogenic Pb concordance. However, Pb-204 is difficult to measure using ICP-MS instruments because of the isobaric interference of Hg-204 on Pb-204. We overcome this limitation by using a reaction cell sandwiched between two quadrupoles within an ICP-MS, which can allow the online chemical separation of two different elements. Ammonia reacts efficiently (> 98%) with Hg while isotopes of Pb are not affected. The approach was tested on eight apatite reference materials (McClure Mountain, NW-1, UWA-1, Otter Lake, Slyudyanka, MK-1, Durango and Fish Canyon Tuff) for which there are independent constraints on the U-Pb crystallisation age, by comparing U-Pb dating results employing different reaction gas mixes (NH3-N2O and NH3 only) in two laboratories. Based on the U-Pb data and SEM analyses on each sample, we can exclude apatite inter- and intra-grain U-Pb age heterogeneity, except for a c. 4% variability of ages in the Otter Lake sample. Our results show that accuracy and precision for U-Pb dating are not measurably affected by different reaction gases, and we accurately reproduce ages of numerous independently characterised apatites within 4% of the reference ages, and the age reproducibility is typically better than 2%.
|
|
| 2029. |
- Xiong, M., et al.
(författare)
-
41.6 Gb/s RZ-DPSK to NRZ-DPSK format conversion in a microring resonator
- 2012
-
Ingår i: 2012 17th Opto-Electronics and Communications Conference. ; , s. 891-892
-
Konferensbidrag (refereegranskat)abstract
- RZ-DPSK to NRZ-DPSK format conversion in a silicon microring resonator is demonstrated experimentally for the first time at 41.6 Gb/s. The converted signal eye diagrams and bit-error-rate measurements show the good performance of the scheme.
|
|
| 2030. |
|
|
