For fabricating silicon solar cells with high conversion efficiency, texturing is one of the most effective techniques to increase short circuit current by enhancing light trapping. In this study, four different types of textures, large V-groove, large U-groove, small V-groove, and small U-groove, were prepared by a wet etching process. Silicon substrates with V-grooves were fabricated by an anisotropic etching process using a KOH solution mixed with isopropyl alcohol (IPA), and the size of the V-grooves was controlled by varying the concentration of IPA. The isotropic etching process following anisotropic etching resulted in U-grooves and the isotropic etching time was determined to obtain U-grooves with an opening angle of approximately 60˚. The results indicated that U-grooves had a larger diffuse reflectance than V-grooves and the reflectances of small grooves was slightly higher than those of large grooves depending on the size of the grooves. Then amorphous Si:H thin film solar cells were fabricated on textured substrates to investigate the light trapping effect of textures with different shapes and sizes. Among the textures fabricated in this work, the solar cells on the substrate with small U-grooves had the largest short circuit current, 19.20 mA/cm2. External quantum efficiency data also demonstrated that the small, U-shape textures are more effective for light trapping than large, V-shape textures.

딸기 펄프를 Serum과 불용성 펄프로 분리하고 serum만 10%향기성분 회수·첨가하여 저온에서 감압농축후 제조합한 향미특성이 우수한 농축 딸기 펄프의 한 응용예로써, 향미품질을 그대로 유지시킨 파우치형태의 잼을 제조하는 새로운 공정을 개발하였다. 이 방법에 의해 제조된 쨈은 개방농축법에 의해 제조된 쨈에 비해 안토시아닌계 색소, vitamin C함량이 높았으며 GC 크로마토그램 상에서 피크의 갯수와 면적에서 뚜렷한 차이를 나타내었다 또한 표면색깔과 관능적인 품질 면에서도 월등히 우수하여 이 새로운 공정의 가능성이 매우 큰 것을 알 수 있었다.