Publications by authors named "H Y Loi"
Desmoplastic small round cell tumor (DSRCT) is an exceptionally rare and highly aggressive primary peritoneal neoplasm predominantly seen in adolescents and young adults. Despite the availability of various treatment modalities, the prognosis remains grim due to the tumor's aggressive nature and tendency for widespread metastasis. Although imaging of DSRCT is frequently documented using computed tomography (CT), the role of 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) in the initial diagnosis, staging, and particularly in the follow-up evaluation, is less explored.
View Article and Find Full Text PDFTin halide perovskites are the most promising candidate materials for lead-free perovskite solar cells (PSCs) thanks to their low toxicity and ideal band gap energies. The introduction of 2D/3D mixed perovskite phases in tin-based PSCs (TPSCs) has proven to be the most effective approach to improving device efficiency and stability. However, a 2D perovskite phase normally shows relatively low carrier mobility, which will be unfavorable for carrier transfer in the devices.
View Article and Find Full Text PDFIdeal bandgap (1.3-1.4 eV) Sn-Pb mixed perovskite solar cells (PSC) hold the maximum theoretical efficiency given by the Shockley-Queisser limit.
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- - The study investigates how effectively PET/MRI can predict treatment response in localized rectal cancer patients undergoing preoperative chemoradiotherapy (CRT), focusing on sensitivity and specificity of imaging parameters.
- - Out of 31 recruited patients with rectal adenocarcinoma, 20 completed the study; results showed that 20% of patients were good responders to treatment, while 80% had a poor response based on histopathological assessments.
- - Key imaging metrics like percent maximum thickness reduction and percent apparent diffusion coefficient (ADC) change demonstrated promising predictive values, suggesting their potential use in identifying good responders, highlighting the need for larger studies to validate these findings.
Tin (Sn) -based perovskite solar cells (PSCs) normally show low open circuit voltage due to serious carrier recombination in the devices, which can be attributed to the oxidation and the resultant high p-type doping of the perovskite active layers. Considering the grand challenge to completely prohibit the oxidation of Sn-based perovskites, a feasible way to improve the device performance is to counter-dope the oxidized Sn-based perovskites by replacing Sn with trivalent cations in the crystal lattice, which however is rarely reported. Here, the introduction of Sb, which can effectively counter-dope the oxidized perovskite layer and improve the carrier lifetime, is presented.
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