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Zinc Borosilicate Thick Films as a Ag-Protective Layer for Dye-Sensitized Solar Cells
연득호,이은영,김경곤,조용수,박남규 한국세라믹학회 2009 한국세라믹학회지 Vol.46 No.3
A zinc borosilicate glass having a low softening temperature of 490℃ has been investigated as a protective layer for Ag patterns against chemical reactions with a I−/I₃− electrolyte in dye-sensitized solar cells (DSSCs). A thick glass layer was prepared by the typical screen printing and firing processes to obtain a final thickness of ~5 µm. The chemical leaching performance of the glass layer in the electrolyte revealed that the reactive Ag pattern can be significantly protected by utilizing the low softening protective layer. The electrical resistance of the FTO-coated glass substrate was effectively maintained at a low value of ~27 Ω as long as the glass layer was well densified at a sufficiently high temperature of ~520℃. The transmittance of the layer was near 60%, depending on the firing temperature of the glass layer.
수열합성법에 의해 Zn 기판 위에 제조된 ZnO 나노로드의 특성
성지혜,김진호,황종희,임태영,연득호,조용수,Sung, Ji-Hye,Kim, Jin-Ho,Hwang, Jong-Hee,Lim, Tae-Young,Yeon, Deuk-Ho,Cho, Yong-Soo 한국결정성장학회 2011 한국결정성장학회지 Vol.21 No.4
수열합성법에 의해 ZnO 씨앗층이 코팅된 Zn 기판 위에 제조된 ZnO 나노로드는 주로 ZnO 전구체 농도에 따라 연구되었다. 주사전자현미경과 X선 회절분석기를 사용하여 얻은 그림은 실험 조건에 따라 변화되는 ZnO 나노로드의 미세구조와 결정상을 밝혀내기 위해 측정되었다. 나노로드의 형태는 전구체 농도에 강하게 결정된다. 예를 들어, 600~700 nm의 직경과 $6.75{\mu}m$의 길이를 갖는 육방정계 구조의 수직 성장된 ZnO 나노로드는 0.015 M의 가장 높은 농도에서 명확하게 관찰되었다. 강한 육방정계 구조는 가장 높은 PL 강도와 $1000{\mu}A$에서 약 6.069 V의 우수한 전압 값과 관련이 있다고 생각된다. ZnO nanorods fabricated on a Zn substrate pre-coated with ZnO as a seed layer by the hydrothermal method were studied mainly as a function of ZnO precursor concentration. Characteristic features by using field-emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) were investigated to define the changed micro-structure and crystalline phase of the ZnO nanorods according to the experimental conditions. The nanorod morphology strongly depended on the precursor concentration. For example, ZnO nanorods vertically aligned with a hexagonal (002) oriented structure with a diameter of 600~700 nm and length of $6.75{\mu}m$ were clearly observed at the highest concentration of 0.015 M. The strong hexagonal structure was believed to be associated with the highest photoluminescene (PL) intensity and a promising voltage value of ca. 6.069 V at $1000{\mu}A$.