http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Jinhee Park,You Seung Rim,Chao Li,Hyung-Seok Kim,Mark Goorsky,Dwight Streit 한국물리학회 2016 Current Applied Physics Vol.16 No.10
Deep-level defect states in sputtered ZnO thin-film transistors were investigated as a function of oxygen partial pressure during sputtering growth. Photo-induced threshold voltage-shift measurements under monochromatic illumination were used to characterize the deep-level defect distribution. Intrinsically, the defect states of oxygen vacancies were ionized to Vo þ and Vo 2þ while the photon energy was absorbed within the bandgap, resulting in the shift of threshold voltage. Extracted deep-level defect distribution from this shift of threshold voltage was clearly confirmed in the range of 1.8e2.1 eV below the conduction band minimum and this region was suppressed with increasing oxygen partial pressure. These deep-level defect states can have a detrimental effect on device performance, such as threshold voltage shift and photo-induced leakage current. The photo instability of the devices occurred under visible light due to the photo-ionization of deep-level trapped charges associated with oxygen vacancies.
Quasi-Two-Dimensional Metal Oxide Semiconductors Based Ultrasensitive Potentiometric Biosensors
Chen, Huajun,Rim, You Seung,Wang, Isaac Caleb,Li, Chao,Zhu, Bowen,Sun, Mo,Goorsky, Mark S.,He, Ximin,Yang, Yang American Chemical Society 2017 ACS NANO Vol.11 No.5
<P>Ultrasensitive field-effect transistor-based biosensors using quasi two -dimensional metal oxide semiconductors were demonstrated. Quasi-two-dimensional low-dimensional metal oxide semiconductors were highly sensitive to electrical perturbations at the semiconductor bio interface and showed competitive sensitivity compared with other nanomaterial-based biosensors. Also, the solution process made our platform simple and highly reproducible, which was favorable compared with other nanobioelectronics. A quasi-two-dimensional In2O3-based pH sensor showed a small detection limit of 0.0005 pH and detected the glucose concentration at femtomolar levels. Detailed electrical characterization unveiled how the device's parameters affect the biosensor sensitivity, and lowest detectable charge was extrapolated, which was consistent with the experimental data.</P>