A-young Kim, Da-eun Bang, Hyo-jun Park, Tae-hyun Kil, Ju-won Yeon, Moon-kwon Lee, Eui-cheol Yun, Min-woo Kim, Su-jin Jeon, Moon-seok Kim, Jun-young Park
J Korean Inst Electr Electron Mater Eng 2025;38(3):296-301. Published online May 1, 2025
Aggressive device scaling has severely degraded the switching characteristics of CMOS transistors. This issue has led to the development of tunneling FETs (TFETs) as an alternative. TFETs, with their asymmetric doping of the source and drain regions, offer improved subthreshold swing (SS) compared to conventional MOSFETs. However, despite this advantage, TFETs still suffer from ambipolar current, which increases off-state current (IOFF). This paper introduces an approach to applying hetero gate dielectrics (HGDs) in nanosheet (NS) TFETs to reduce ambipolar current characteristics. The magnitude of the drain electric field is reduced by selectively forming a high-k dielectric near the source region This configuration allows the TFETs to avoid unintended band-to-band tunneling (BTBT) and suppress ambipolar current during the off-state.
Gd(1-x)VO4:Eu(x)3+ red phosphors were synthesized with changing the concentration of Eu3+ ion by using a solid-state reaction method. The crystal structure, surface morphology, and photoluminescence and photoluminescence excitation properties of the red phosphors were measured by using X-ray diffractometer, field emission-scanning electron microscopy, and florescence spectrometer, respectively. The XRD results showed that the main peak of all the phosphor powders occurs at (200) plane. As for the photoluminescence properties, the maximum excitation spectrum occurred at 306 nm due to the charge transfer band from VO4(3-) to Eu3+ ions and the maximum emission spectrum was the red luminescence peaking at 619 nm when the concentration of Eu3+ ion was 0.10 mol.
Enhanced Red Luminescence in Dy3+/Eu3+ Co-doped Calcium Alumino Borosilicate Glasses for w-LED Applications Videsh Kumar, Sheetal Kumari, Shristy Malik, Ravita, Tripti Sharma, Aman Prasad, A. S. Rao Journal of Fluorescence.2025; 35(8): 7385. CrossRef
Effect of copper addition on lithium zinc borosilicate glass containing terbium oxide I. Kashif, Sahar Saad Ali, Nourhan. M. Khodeir, Mariam. A. Elhakiem, A. Ratep Journal of Optics.2025; 54(5): 3136. CrossRef
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