| Budget Amount *help |
¥20,670,000 (Direct Cost: ¥15,900,000、Indirect Cost: ¥4,770,000)
Fiscal Year 2015: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2013: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
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| Outline of Final Research Achievements |
Manufacturing process of mono-dispersed silicon balls for spherical solar cell was investigated. A capillary jet of molten metal was issued from a nozzle at the bottom of a crucible, and the jet was split into droplets. The droplets were solidified during falling and metal particles were obtained. In order to produce mono-dispersed particles, there are two important points: (1) splitting the jet at the same interval, (2) to prevent the droplets from colliding with each other during falling. An electromagnetic pinch force was applied intermittently to the capillary jet to generate a regular periodic variation on the surface, resulting in mono-dispersed droplets. The droplets were electrically charged by a high electric voltage applied to an electrode surrounding the jet. The coulomb repulsive force acting on the charged droplets prevents them from coalescence.
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