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Optical properties of conjugated polymers having linear carbon moieties
M.Kijima,I.Kinoshita,K.Hiroki,H.Shirakawa,K.Yoshikawa,Y.Mishima,N.Sasaki 한국물리학회 2002 Current Applied Physics Vol.2 No.4
Alternate conjugated copolymers consisting of phenylene or biphenylylene unit and linear carbons unit such as cumulene andpolyyne were synthesized. The optical property of these polymers was investigated by UVVis and uorescence spectroscopies.Among cumulene-type polymers, the polymer having allene moiety showed a unique hypsochromic shift and intense blue uo-rescence in solution, while poly(phenylenebutadiynylene)s, typical of polyyne-type linear conjugated polymers, showed uorescencepolymers on optical property as well as the band structure were evaluated on the basis of Hammet parameters, which was utilizedfor designing of the polymers. The poly(arylenebutadiynylenes)s were applied in polymer LED. The devices consisting of ITO/PEDOT-PSS/emitting polymer/Ca/Al realized EL emissions in the region covering RGB colors.. 2002 Elsevier Science B.V. All rights reserved.
A High Speed Fault Simulator for Sequential Circuits with Bidirectional Elements
Kang, M. S.,Shimosakoda, Y.,Iwashita, H.,Shirakawa, I. 대한전자공학회 1991 ICVC : International Conference on VLSI and CAD Vol.2 No.1
A high speed fault simulator is described, which can be applied to sequential circuits containing both uni-and bidirectional CMOS transmission gates. This simulator is distinctive in that it takes advantage of the parallel, deductive, and concurrent simulation schemes, in terms of evaluation of faulty gates, insertion of faults, and propagation of fault lists, respectively. A number of implementation results are also shown, which reveal the efficiency of the simulator especially for CMOS transmission gates.