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Articles by Tom Wu
AI-accelerated scalable synthesis of nanocrystals for cost-effective photovoltaics
Abstract Metal halide perovskite nanocrystals (PNCs) are promising candidates for next-generation optoelectronics. However, their commercial application necessitates low-cost synthesis and processing methods that surpass conventional lab-scale techniques. To address this, we report a ligand triggered room-temperature injection (LTRI) method that initiates nanocrystal nucleation by tuning precursor reactivity with addition of short-chain octanoic acid (OcA).
Symmetry-breaking co-assembly of conjugated molecules boosts perovskite photovoltaics
Abstract In perovskite photovoltaics, self-assembled molecules (SAMs) have demonstrated the ability to enhance interface quality, reduce charge recombination, and improve energy-level alignment. However, most symmetrical molecules for photovoltaic applications tend to self-aggregate, which hinders uniform film formation, reduces the active surface area, and limits interface contact and device efficiency.
Unpacking early risks for peer victimization: A network analysis of early temperament and polygenic risk scores
INTRODUCTION Peer victimisation is a prevalent social problem that has significant impacts on victims. An estimated 32% of school students worldwide have reported being victims of repeated, unwanted, and negative actions from their peers at least once in the past month (UNESCO, 2019); this proportion is likely to be even higher in younger children, as peer victimisation tends to decrease with age (Dulmus, et al., 2006; Twardowska-Staszek et al., 2018).
Dynamic nanodomains dictate macroscopic properties in lead halide perovskites - Nature Nanotechnology
Abstract Lead halide perovskites have emerged as promising materials for solar energy conversion and X-ray detection owing to their remarkable optoelectronic properties. However, the microscopic origins of their superior performance remain unclear. Here we show that low-symmetry dynamic nanodomains present in the high-symmetry average cubic phases, whose characteristics are dictated by the A-site cation, govern the macroscopic behaviour.
Conductive colloidal perovskite quantum dot inks towards fast printing of solar cells - Nature Energy
Abstract Quantum dot (QD) provides a versatile platform for high-throughput processing of semiconductors for large-area optoelectronic applications. Unfortunately, the QD solar cell is hampered by the time-consuming layer-by-layer process, a major challenge in manufacturing printable devices.
High-κ perovskite membranes as insulators for two-dimensional transistors - Nature
Abstract The scaling of silicon metal–oxide–semiconductor field-effect transistors has followed Moore’s law for decades, but the physical thinning of silicon at sub-ten-nanometre technology nodes introduces issues such as leakage currents1. Two-dimensional (2D) layered semiconductors, with an atomic thickness that allows superior gate-field penetration, are of interest as channel materials for future transistors2,3.
Not in education, employment and training: pathways from toddler difficult temperament
Abstract Background Youths disengaged from the education system and labour force (i.e. ‘Not in Education, Employment, or Training’ or ‘NEET’) are often at reduced capacity to flourish and thrive as adults. Developmental precursors to NEET status may extend back to temperamental features, though this – and possible mediators of such associations such as attention deficit hyperactivity (ADHD) symptoms and antisocial behaviours (ASB) – have yet to be directly tested.
A monolithic artificial iconic memory based on highly stable perovskite-metal multilayers
Artificial sensory memory, which incorporates the sensor and memory components in one electrical device to mimic the biological sensory neuron, has drawn great attention in the last decade within the overall context of artificial intelligence (AI) development.1–31. C. Wan, P. Cai, M. Wang, Y. Qian, W. Huang, and X. Chen, Adv. Mater. 32(15), e1902434 (2020). https://doi.org/10.1002/adma.2019024342. C. Wan, G. Chen, Y. Fu, M. Wang, N. Matsuhisa, S. Pan, L. Pan, H. Yang, Q. Wan, L. Zhu, and X. Chen, Adv. Mater.
Formation of DY Center as n-type Limiting Defect in Bi-Doped Hybrid Halide Perovskites
Formation of DY Center as n-type Limiting Defect in Bi-Doped Hybrid Halide Perovskites It is well known that the DX center is a major limiting defect that limits the n-type doping in some tetrahedral coordinated semiconductors. It is a deep negatively charged defect complex converted from a nominal shallow donor defect, which can serve as a trap center of electrons, thus is detrimental to the performance of optoelectronic devices.
Celebrating the 2022 Nobel Prize in Physics Home
About this collection This cross-journal collection is dedicated to quantum computing and quantum information storage, in honour of the 2022 Nobel Prize in Physics. Quantum information science involves replacing the binary classical bit with a quantum bit (qubit) and promises to revolutionize the field of information technology.
Celebrating the 2022 Nobel Prize in Physics Home
Review Article Microfluidic synthesis of quantum dots and their applications in bio-sensing and bio-imaging Yu Cheng, Si Da Ling, Yuhao Geng, Yundong Wang and Jianhong Xu Biosensing and bioimaging of organisms or molecules allows for the study of physiological processes or the diagnosis of diseases. QDs are promising optical detectors and microfluidic technology is one promising path for their industrial production.
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