한국신재생에너지학회:학술대회논문집
- 한국신재생에너지학회 2010년도 추계학술대회 초록집
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- Pages.37.2-37.2
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- 2010
정전기 스프레이 기술을 이용한 CIS 박막코팅에 관한 실험적 연구
Experimental study on CIS thin film deposition via electrostatic spray technique
초록
Electrostatic spray deposition is an innovative coating technique that produces fine, uniform, self-dispersive (due to the Coulombic repulsion), and highly wettable, atomized drops. Copper-indium salts are dissolved in an alcohol-based solvent, which is then electrostatically sprayed onto a moderately heated, molybdenum-coated substrate. Solvent flowrates range from 0.02 to 5 ml/hr under applied voltages of 1 to 20 kV yielding drop sizes around a few hundred nanometers. By comparing the scanning electron miscrscope images of coated samples, the substrate temperature, applied voltage, solvent flowrate, and nozzle-substrate distance are demonstrated to be the primary parameters controlling coating quality. Also, the most stable electrostatic spray mode that reliably produces uniform and fine drops is the cone-jet mode with a Taylor cone issuing from the nozzle.