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Generation of nitridated silicon nanoparticles and the application to solar cell
G. Uchida,Y. Kawashima,K. Yamamoto,M. Sato,K. Kamataki,N. Itagaki,K. Koga,M. Shiratani 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
Semiconductor nanocrystals have attracted much attention as materials for multiple-exciton generation (MEG) photovoltaics. Surface modification of such nanocrystals is important to make quantum well structure for efficient MEG as well as to extract photo-generated carriers from nanocrystals. In this study, nitridated silicon particles were produced by SiH₄/H₂/N₂ PECVD, where generation of silicon particles and their surface nitridation were independently controlled using two multi-hollow discharges. We observed strong photoluminescence (PL) emission in an energy range of 1.9 to 2.4 eV from Si particle, which may be explained by a quantum-confinement effect of silicon particles embedded in the thin film.
Prediction of Blast Furnace Operation using On-line Bayesian Learning
N.Kaneko,S.Sakamoto,K.Uchida,H.Ogai,M.Ito,S.Matsuzaki 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
The large scale database-based online modeling, called LOM, is a type of Just-In-Time modeling for blast furnace. In this paper, we propose a new type of LOM using a nonlinear local model to improve the performance of the long-term prediction. To estimate the parameter of the nonlinear local model, we use on-line Bayesian learning scheme with Sequential Monte Carlo. The prediction performance of the new LOM is demonstrated by using the real process data of blast furnace.
Fluorinated Metal Hydrides for the Catalytic Hydrolysis of Metal - Hydrogen Complexes
Suda, S,Zhou, Y,Sun, Y M,Uchida, M,Liu, B H,Mormitu, S,Arai, K,Tsukamoto, N,Candra, Y,LI, Z P 대한금속재료학회(대한금속학회) 2001 METALS AND MATERIALS International Vol.7 No.1
This paper is related to the hydrogen storage (H-storage) system composed of an alkaline solution that contains metal-hydrogen complex ions. The BH₄^--complex ions stabilized when it is dissolved in aqueous KOH or NaOH to form homogeneous solutions. However, it is necessary to apply an appropriate catalyst for a high rate generation of hydrogen under atmospheric pressure and temperature conditions. The authors intended to develop catalysts suitable for the hydrolysis of BH₄^--complex ion solutions and found that Mg₂Ni exhibits excellent catalytic functions in the hydrolysis, in particular, after the fluorination treatment (F-treatment). In this work, the effects of F-treatment on the rates of hydrolysis were evaluated between the hydrided and unhydrided Mg₂Ni. No hydrogenation in addition to F-treatment is required in view of hydrolysis kinetics and cost-effectiveness.