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폴리이미드가 코팅된 광섬유 브래그 격자를 이용한 습도센서
양재창,김건표,김광택,Jae Chang Yang,Gun Pyo Kim,Kwang Taek Kim 한국전기전자재료학회 2023 전기전자재료학회논문지 Vol.36 No.6
We have proposed and demonstrated a fiber optic RH (relative humidity) sensor based on fiber Bragg grating covered with a polyimide film. As the polyimide film absolves the moisture in the air, its volume expands. As a result, the grating period of the FBG (fiber Bragg grating) covered with a polyimide film becomes wide and the Bragg wavelength is shifted. The sensor is implemented by fixing a 30 ㎛ thickness polyimide film on the surface of an optical fiber grating using an adhesive, and the characteristics of the device according to humidity are analyzed. The fabricated FBG RH sensor showed a high sensitivity of 0.0186 nm/RH% and a wide measurement range from 30% to 90%. The influence of environmental temperature on the characteristics of the RH sensor was also measured and analyzed. The feasibility of commercialization is presented.
염료감응 태양전지를 이용한 선박용 LED등의 보조 전원 개발
이진(Jin Lee),양재창(Jae-Chang Yang),김상기(Sang-Ki Kim),소순열(Soon-Youl So) 대한전기학회 2014 전기학회논문지 Vol.63 No.9
The color and the installation position of the LED lamp for night voyage of the ship are changed by the purpose of it. The power dissipation occurs because a navigation light is on and off or continuously on. In addition, in case that the light is produced by operating generator in the ship, it’s very inefficient except that it’s on a voyage. Therefore in this dissertation, we construct auxiliary power system for the LED lamp of the ship, producing and developing a module, a panel, and a charging system using Dye-sensitize Solar Cell.
송용환(Song, Yongwhan),김상기(Kim, Sangki),양재창(Yang, Jaechang),박준호(Park, Junho),김명수(Kim, Myoungsoo),구할본(Gu, Halbon),박경희(Park, Kyunghee) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
Chemically functionalized plant oils such as acrylated epoxidized soybean oil (AESO) and maleinized acrylated epoxidized soybean oil (MAESO) were used as new bio-based binders for TiO₂ electrodes of dye-sensitized solar cells (DSSC). More porous networks and larger porosities were fabricated on the TiO₂ films using plant oil binders due to the larger number of functionalities, in comparison with the film using polyethylene glycol (PEG). The charge-transfer resistance in the TiO₂ films was considerably shrunk due to the reduced impurity states. The short circuit photocurrent (Isc) and the open circuit photovoltage (Voc) of the cell using plant oil binders increased and the conversion efficiency improved significantly.