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106 results on '"Lee, Yuan-Hsi"'

5. Studies of NiO/Ag/NiO transparent conducting electrodes on NiO and ZnO Schottky diodes.

Author

Hwang, Jun-Dar and Lee, Yuan-Hsi

Abstract

A nickel oxide (NiO)/silver (Ag)/NiO (NAN) transparent conducting electrode (TCE) was deposited on NiO and zinc oxide (ZnO) to fabricate Schottky diodes (SDs). The physical and electrical properties of NAN/NiO and NAN/ZnO SDs were studied. In addition, conventional Au/ZnO SDs were fabricated for comparison. The prepared NAN TCE was of n-type, with more than 40% transmittance and a low sheet resistance of 6.5 Ω sq.−1, indicating that NAN is an exceptional TCE. Secondary ion mass spectrometry revealed that Ag atoms diffused into NiO and ZnO in the NAN/NiO and NAN/ZnO SDs, respectively. Owing to the large number of defects on the ZnO surface, the current–voltage (I–V) characteristics of the Au/ZnO SDs followed a linear curve. However, the reduced number of defects and a large barrier height at the NAN/ZnO interface led to a rectifying I–V curve in NAN/ZnO SDs. In contrast, a near homojunction at the NAN/NiO interface caused a linear I–V curve and a large leakage current in NAN/NiO SDs. These issues resulted in a lower ideality factor (5.32) in NAN/ZnO SDs than that in NAN/NiO SDs (15.14). The NAN/ZnO SDs exhibited a higher barrier height (0.91 eV) than the NAN/NiO SDs (0.55 eV). The mechanism of carrier transport was investigated using a ln(I) versus ln(V) plot. The NAN/NiO SDs only exhibited one region of ohmic conduction. However, two distinct regions were observed in the NAN/ZnO SDs. For V ≤ 0.7 V, the space-charge-limited current dominated; however, the diffusion–recombination model controlled carrier transport at V ≥ 0.7 V. Band diagrams were proposed to elucidate the carrier transport mechanism in NAN/NiO and NAN/ZnO SDs. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Late-Cenozoic Faulting History of the Central Longmenshan Thrust Belt and Its Tectonic Implications

Author

Tan, Xi-Bin, Lee, Yuan-Hsi, Xu, Xi-Wei, Liu, Yi-Duo, Lu, Ren-Qi, Ip, Wing-Huen, Editor-in-Chief, Ando, Masataka, Series Editor, Chen, Chen-Tung Arthur, Series Editor, Di, Kaichang, Series Editor, Gan, Jianping, Series Editor, Liu, Philip L.-F., Series Editor, Lo, Ching-Hua, Series Editor, Slavin, James A., Series Editor, Zhang, Keke, Series Editor, Deshpande, R. D., Series Editor, Jull, A. J. Timothy, Series Editor, Xu, Xiwei, editor, and Chang, Wen-Yen, editor

Published
2021
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15. Out of sequence faulting in the backbone range, Taiwan: Implications for thickening and exhumation processes

Author

Lee, Yuan-Hsi, primary, Byrne, Timothy B., additional, Lo, Wei, additional, Wang, Shao-Jyun, additional, Tsao, Shuh-Jong, additional, Chen, Cheng-Hong, additional, Yu, Han-Cheng, additional, Tan, Xinbin, additional, van Soest, Matthijs, additional, Hodges, Kip, additional, Mesalles, Lucas, additional, Robinson, Holden, additional, and Fosdick, Julie C., additional

Published
2022
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16. Episodes of Barren to Fertile Porphyry Copper Deposit Magmatism on a Complex Island Arc System: Insights from the Igneous Host Rocks of the Suyoc Epithermal Prospect, Northern Luzon, Philippines

Author

Jabagat, Karl, primary, Gabo-Ratio, Jillian Aira, additional, Yumul, Graciano, additional, Dimalanta, Carla, additional, Lee, Yuan-Hsi, additional, Queaño, Karlo, additional, Soberano, Omar, additional, Andal, Eric, additional, and Yonezu, Kotaro, additional

Published
2022
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17. U-Pb single grain zircon ages for Sanbagawa Metamorphic Rocks in central Shikoku (Japan): the Sanbagawa Belt re-united

Author

Knittel, Ulrich, Walia, Monika, Suzuki, Shigeyuki, and Lee, Yuan-Hsi

Subjects
Asemi River, Late Cretaceous, U-Pb zircon dating, Sanbagawa Metamorphic Belt
Abstract

The high-P/low-T Sanbagawa Metamorphic Belt that traverses SW Japan, has been subdivided into two belts thought to have been metamorphosed at ca. 120 Ma and at ca. 65 Ma (‘Sanbagawa Metamorphic Rocks’ and ‘Shimanto Metamorphic Rocks’). The subdivision was based on the assumption that metamorphism occurred at ca. 116 Ma, largely based on an early Rb-Sr isotope study and zircon data obtained for the eclogite unit of the Sanbagawa Belt, whereas in some parts of the belt detrital zircons of late Cretaceous age (90-80 Ma) were discovered. Analysis of detrital zircons sampled from two sites within the area considered to expose the older ‘Sanbagawa Metamorphic Rocks’, including the area investigated by the Rb-Sr study, reveals the presence of zircons younger than 95 Ma in all samples and some grains as young as 80 ± 4 Ma. It is therefore concluded that the Sanbagawa Belt is one single tectonic entity that formed in the Late Cretaceous though it contains older components, including fossiliferous clasts, older basic meta-volcanics and eclogite units that may record earlier metamorphic events.

Published
2018

41. Age and anatomy of the Gongga Shan batholith, eastern Tibetan Plateau, and its relationship to the active Xianshui-he fault

Author

Searle, Michael P., Roberts, Nick M.W., Chung, Sun-Lin, Lee, Yuan-Hsi, Cook, Kristen L., Elliott, John R., Weller, Owen M., St-Onge, Marc R., Xu, Xi-Wei, Tan, Xi-Bin, Li, Kang, Searle, Michael P., Roberts, Nick M.W., Chung, Sun-Lin, Lee, Yuan-Hsi, Cook, Kristen L., Elliott, John R., Weller, Owen M., St-Onge, Marc R., Xu, Xi-Wei, Tan, Xi-Bin, and Li, Kang

Abstract

The Gongga Shan batholith of eastern Tibet, previously documented as a ca. 32–12.8 Ma granite pluton, shows some of the youngest U-Pb granite crystallization ages recorded from the Tibetan Plateau, with major implications for the tectonothermal history of the region. Field observations indicate that the batholith is composite; some localities show at least seven crosscutting phases of granitoids that range in composition from diorite to leucocratic monzogranite. In this study we present U-Pb ages of zircon and allanite dated by laser ablation–inductively coupled plasma–mass spectrometry on seven samples, to further investigate the chronology of the batholith. The age data constrain two striking tectonic-plutonic events: a complex Triassic–Jurassic (ca. 215–159 Ma) record of biotite-hornblende granodiorite, K-feldspar megacrystic granite and leucogranitic plutonism, and a Miocene (ca. 14–5 Ma) record of monzonite-leucogranite emplacement. The former age range is attributed to widespread Indosinian tectonism, related to Paleo-Tethyan subduction zone magmatism along the western Yangtze block of south China. The younger component may be related to localized partial melting (muscovite dehydration) of thickened Triassic flysch-type sediments in the Songpan-Ganze terrane, and are among the youngest crustal melt granites exposed on the Tibetan Plateau. Zircon and allanite ages reflect multiple crustal remelting events; the youngest, ca. 5 Ma, resulted in dissolution and crystallization of zircons and growth and/or resetting of allanites. The young garnet, muscovite, and biotite leucogranites occur mainly in the central part of the batholith and adjacent to the eastern margin of the batholith at Kangding, where they are cut by the left-lateral Xianshui-he fault. The Xianshui-he fault is the most seismically active strike-slip fault in Tibet and is thought to record the eastward extrusion of the central part of the Tibetan Plateau. The fault obliquely cuts all granites of the

Published
2016

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