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팽성환(Sung-Hwan Paeng),김두환(Doo-Hwan Kim),박민우(Min-Woo Park),성열문(Youl-Moon Sung) 대한전기학회 2009 전기학회논문지 Vol.58 No.12
In this work, TCO-less dye-sensitized solar cells (DSCs) using Ti-mesh layer is fabricated for high-efficient low-cost solar cell application. The Ti-mesh metal can replace TCO in the photo-electrode part of DSCs, thus the cell structure is composed of a glass/dye sensitized TiO2 particle/ Ti-mesh layer/electrolyte/Pt sputtered counter electrode/glass. The Ti-mesh electrode with high conductivity can collect electrons from the TiO₂ layer and allows the ionic diffusion of I?/I₃? through the mesh hole. Thin Ti-mesh (∼40㎛ in thickness) electrode material is processed using rapid prototype method. The efficiency of prepared TCO-less DSCs sample is about 1.45 % ((ff: 0.5, Voc: 0.52V, Jsc: 5.55 ㎃/㎠).
팽성환(Sung-Hwan Paeng),최우진(Woo-Jin Choi),곽동주(Dong-Joo Kwak),성열문(Youl-Moon Sung) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.9월
Transparent conductive metal oxide films of In<SUB>2-x</SUB>Ti<SUB>x</SUB>O₃ (ITiO) and In<SUB>2-x</SUB>Sn<SUB>x</SUB>O₃ (ITO) were deposited by RF magnetron sputtering at substrate temperature of 300℃ and at high rate (~10㎚/min). Electrical and optical properties of the films were investigated as well as film structure and morphology, as it is compared with the commercial F:SnO₂ (FTO) glass. Near infrared ray transmittance of ITiO is the highest for wavelengths over 1000㎚, which can increase dye sensitized compared to ITiO and FTO. Dye-sensitized solar cells (DSCs) were fabricated using the ITiO, ITO and FTO. Photoconversion efficiency (?) of DSC using ITiO is 5.5%. whereas 5.0% is obtained from DSC with ITO. both at 100 ㎽/㎠ light intensity.
팽성환(Sung-Hwan Paeng),곽동주(Dong-Joo Kwak),성열문(Youl-Moon Sung),이명희(Myung-Hee Lee) 한국조명·전기설비학회 2010 한국조명·전기설비학회 학술대회논문집 Vol.2010 No.5월
In this study, SUS-Mesh replaced high-cost transparent conductive oxide (TCO) layer. To improve conversion-efficiency of dye-sensitized solar cells (DSCs), SUS-Mesh was also coated with Al2O₃ and SiO₂. In result, the conversion-efficiency of DSC coated with Al₂O₃ by sol-gel method was 1.68% (Jsc:9.27㎃/㎠, Voc:0.73V, ff:0.24). This result had higher efficiency (0.3%) than non-coated DSC. The short-circuit current density (Jsc) also improved considerably, however, the DSC coated with Al₂O₃ by sol-gel had low fill factor.
나노 다공질 타이타늄 박막의 스퍼터 증착과 광전변환 특성
팽성환(Sung-Hwan Paeng),박민우(Min-Woo Park),성열문(Youl-Moon Sung) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
Ti-layer was deposited onto TiO₂ nanopartcles layer by RF magnetron sputtering in 500㎚ thickness. The transparent conductive oxide (TCO) layer was replaced by the high porosity Ti thin film. Thus TCO-less dye-sensitized solar cells (DSCs) sample was fabricated. The porous Ti layer with high conductivity can collect electrons from the TiO₂ layer and allows the ionic diffusion of I?/I₃?to the dye molecules through the holes in Ti thin film. The effeciency of as-fabricated TCO-less DSCs is 3.73% (Voc:0.68V, Jsc:9.61mA/㎠. FF:0.58).
RF 스퍼터링에 의한 ITiO 박막 제작과 태양전지에의 응용
팽성환(Sung-Hwan Paeng),곽동주(Dong-Joo Kwak),성열문(Youl-Moon Sung),이돈규(Don-Kyu Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Transparent conductive metal oxide films of In<SUB>2-x</SUB>Ti<SUB>x</SUB>O₃ (ITiO) and In<SUB>2-x</SUB>Sn<SUB>x</SUB>O₃ (ITO) were deposited by RF magnetron sputtering at relatively low substrate temperature (~300℃) and at high rate (~10㎚/min). Electrical and optical properties of the films were investigated as well as film structure and morphology, as it is compared with the commercial F:SnO₂ (FTO) glass. Near infrared ray transmittance of ITiO is the highest for wavelengths over 1000㎚, which can increase dye sensitized compared to ITiO and FTO. Dye-sensitized solar cells (DSCs) were fabricated using the ITiO, ITO and FTO. Photoconversion efficiency (η) of DSC using ITiO is 5.5%, whereas 5.0% is obtained from DSC with ITO, both at 100 ㎽/㎠ light intensity.
새로운 양방향 ZVS PWM SEPIC/ZETA 컨버터
박성대(Sung-Dea Park),팽성환(Seong-Hwan Paeng),김인동(In-Dong Kim),노의철(Eui-Cheol Nho) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
본 논문에서는 새로운 양방향 ZVS PWM Sepic/Zeta 컨버터를 제안한다. 제안한 컨버터는 PWM 제어가능한 컨버터로서 입력과 출력 전압의 극성이 같은 비반전 컨버터의 특징을 지니며 DC 전압의 전달함수가 양방향 모두 M=D/(1-D)로 동일하다. 또한 각방향으로 진력전달시 다이오드와 병렬로 연결된 MOSFET가 다이오드의 ‘ON’시 동시에 ‘ON’되어 Sychronous Rectifier로 동작하므로 도통 손을 저감하였으며, Auxiliary Resonant Commutated Pole를 사용하여 저감 된 스위칭 손실을 갖는 특성을 지니고 있다. 또한 Transformer 버전이 존재하므로 입력과 출력사잉에 전기적 절연을 필요로 하는 실제응용에 유용하게 사용할 수 있다.