| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
By exposing vertically aligned single-walled CNT films to the vapor of a temperature-controlled water bath, the CNTs self-assembled into a micro-honeyomb structure. The obtained structure was dependent on the nanotube film thickness and the water vapor treatment parameters. We found that the honeycomb structure fabricated by this method exhibited higher transmittance and conductivity than another all-carbon material known as buckypaper.
We found that the single-walled CNTs in the honeycomb cell self-assembled into a flat layer that makes good contact with the underlying silicon substrate. We transferred the honeycomb onto an n-type silicon wafer, forming a heterojunction solar cell. Without doping or other treatment, we found the light conversion efficiency increased by approximately 5%.
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