Carbon fiber material in musical instrument making
In: Materials and design, Band 89, S. 660-664
ISSN: 1873-4197
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In: Materials and design, Band 89, S. 660-664
ISSN: 1873-4197
In: International journal of sustainable development & world ecology, Band 16, Heft 5, S. 346-355
ISSN: 1745-2627
In: Materials & Design, Band 41, S. 142-149
In: Reproductive sciences: RS : the official journal of the Society for Reproductive Investigation, Band 29, Heft 1, S. 133-142
ISSN: 1933-7205
In: https://www.osapublishing.org/ome/abstract.cfm?uri=ome-7-10-3643
Recently, monoclinic Ga2O3 (beta-Ga2O3) photodetectors (PDs) have been extensively studied for various commercial and military applications due to the merits of intrinsic solar rejection, high gain, and great compactness. In this work, c-plane sapphire substrates were annealed under different temperatures in a vacuum furnace prior to the molecular beam epitaxy (MBE) of beta-Ga2O3 thin film, which yielded a smoother surface and even a terraceand- step-like morphology on the substrate, resulting in improved crystallinity of the epitaxial film. Accordingly, both the dark and photo currents of beta-Ga2O3 metal-semiconductor-metal (MSM) PDs were increased by the enhanced carrier mobility (mu) of the more crystalline film. However, the substrate-annealing temperature must be sufficiently high to offset the rise of the dark current and thus achieve a remarkable improvement in the photodetection properties. As a result, the PD fabricated on the 1050 degrees C-annealed substrate exhibited extremely high sensitivity, for example, high responsivity (R) of 54.9 A/ W and large specific detectivity (D*) of 3.71 x 10(14) Jones. Both parameters were increased by one order of magnitude because of the combined effects of the dramatic increase in mu and the effective reduction in defect-related recombination centers. Nevertheless, the latter also prolonged the recovery time of the PD. These findings suggest another way to develop beta-Ga2O3 PD with extremely high sensitivity. (C) 2017 Optical Society of America
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In: Reproductive sciences: RS : the official journal of the Society for Reproductive Investigation, Band 28, Heft 12, S. 3341-3351
ISSN: 1933-7205
SSRN
In: Bulletin of the World Health Organization: the international journal of public health = Bulletin de l'Organisation Mondiale de la Santé, Band 102, Heft 4, S. 244-254
ISSN: 1564-0604