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CdS Spray 조건이 Cu₂S/CdS 태양 전지에 미치는 영향
車德濬 群山大學校 1984 論文集 Vol.9 No.-
In order to fabricate effective Cu₂S/CdS solar cells the CdS layer was prepared by using a spray pyrolysis method. Some properties of CdS sprayed layers were investigated, namely, the sheet resistivity and transmittance on temperature conditions, and so forth. For obtaining high efficiency solar cells, heat treatment and electrode contact state were very important factors. A maximum efficiency of the best result was 2.6% and F.F = 0.45, Isc=10.2mA, Voc = 0.43 Volt on AM 2(75 mW/㎠) condition.
尹昌先,金炳鎬,車德濬 群山大學校 1985 論文集 Vol.11 No.-
Optical absorption of flash-evaporated SnSe₂ thin films has been observed in range from 200 to 900 mm. From absorption spectra, a threshold for indirect phonon-assisted transitions was found to occur at 0.96±0.02 eV. The structure of amorphous SnSe₂ thin films has studied by X-ray and thermal analysis. Photoconductivity data for SnSe₂ thin films are also presented.
SILK SCREEN PRINTING 방법에 의한 규소 태양전지의 전극형성에 관한 연구
車德濬 群山大學校 1984 論文集 Vol.8 No.-
Silicon solar cells were fabricated by using silk screen printing technique for metalization. Then a silver paste was screened on the front surface. The efficency of the solar cells of the silver paste metalization was compared with the vacuum evaporation metalization of Ti/Pd/Ag. And also the contact resistance was measured by three point probe method, and surface figures were observed by microscope.
SPRAY PYROLYSIS 방법에 의한 CdS(In, Cu)박막의 특성에 관한 연구
金炳鎬,車德濬 群山大學校 1983 論文集 Vol.6 No.-
The properties of CdS(In, Cu)thin films deposited on glass substrates have been studied by the technique of spray pyrolysis, and also then compaired with Indium and Copper doped CdS thin films. Specially the studied properties are (1) Transmittance and Absorption coefficient as functions of wavelength, (2) Energy gap,(3) Photoconductivity at room temperature, (4) Photocurrent as functions of voltage and illuminance. The photosensitivity was larger for the impurity doped CdS films than for the CdS thin films without impurity and the largest for the Copper doped CdS thin films. The Energy gap of the Copper doped CdS thin film was 2.38 eV. Study by X-ray diffraction showed the thin films to be Hexagonal structure.
金炳鎬,車德濬 群山大學校 1984 論文集 Vol.7 No.-
The conductivities of quartz glass, alumina ceramics, and mica among the furnace materials are measured by the direct method over a range of high temperatures. The materials are electrical insulators at room temperature. But the insulators change into conductors at high temperatures and we observe that this character can disturb the temperature controlling and measuring function of the furnace system.
윤창선,차덕준 群山大學校自然科學硏究所 1986 自然科學硏究 Vol.1 No.-
The optical absorption edges of flash-evaporated GaSe thin films are studied near the fundamental edge. Measurements of GaSe thin films annealed at various temperatures and having different thickness are analysed and discussed in terms of the optical energy gap. The annealing has the effect of increasing the values of the optical energy gap.
Spray pyrolysis 방법에 의한 넓은 면적의 Cu₂S / CdS 태양전지의 제작
차덕준(D. Cha),고정곤(J. Ko),정상조(S. Chung),남승재(S. Nam),김광윤(K. Kim),전용기(Y. Jun) 한국진공학회(ASCT) 1996 Applied Science and Convergence Technology Vol.5 No.4
Spray pyrolysis 방법으로 넓은 면적의 Cu₂S/CdS 태양전지를 제작하였다. 제작과정에서 전극형성, CdS spray 온도조건, Cu₂S층의 접합 조건등 태양전지의 효율에 영향을 주는 요인을 조사하였다. CdS 박막의 조건은 주사 전자현미경, X-선 회절기, 온도변화에 따른 광흡수 및 광전도 특성등을 통해 결정하였다. 1㎠의 면적의 전지에 air mass 2(AM2)인 75㎽/㎠로 빛을 조사했을 때 3.15%의 효율을 얻었다. We fabricated the effective Cu₂S/CdS solar cells with large area by a spray pyrolysis method. In preparation process, we investigated the process parameters which directly influenced the efficiency of solar cell, such as the grid contact for electrodes, the temperature condition of CdS spray and the junction characteristics of Cu₂S layer, by scanning electron microscope(SEM), x-ray diffraction(XRD) and temperature dependent optical absorption and photoconductivity. The Cu₂S/CdS solar cell with area of 1 ㎠ showed the efficient of 3.15% under air mass 2(AM2) spectrum irradiation with 75 mW/㎠.
차덕준,심문식 群山大學校自然科學硏究所 1989 自然科學硏究 Vol.4 No.-
Nuclear Magnetic Resonance(NMR) techniques have been employed to investigate the bonding structural environment of boron atoms as a function of composition of the binary BaO-B₂O₃glasses. It is found that the ?? NMR spectra consist of the superposition of a narrow line which is due to boron atoms tetrahedrally bonded to four oxygens(BO₄units) and a broad line which is produced by the planar BO₃units. The values of N₄, the fraction of four coordinated boron atoms(BO₄) to total boron atoms were measured and analyzed as a function of R, where R=mol.% BaO/mol.% B₂O₃. From the structural studies of the glasses in the system BaO-B₂O₃, it was confirmed that the structural units accorded with alkali borate glasses.
차덕준,고정곤,이가라시 무쑤오,하시모토 슈이치,오꾸보 노리아키,요시자끼 료조,와따나베 유헤이,모리시타 노리오,나시야마 이사무 群山大學校基礎科學硏究所 1995 基礎科學硏究 Vol.10 No.-
The spin-lattice relaxation time T₁in a dehydrated Na-X zeolite has been investigated by using 23Na NMR technique at 80K. The central transition of 23Na broadened by the quadrupolar interaction was observed and the spin echo signal was employed to measure the spin-lattice relaxation. The magnetization recovery curve has been fitted to compare with the theory of the Raman process based on covalency.