| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Outline of Final Research Achievements |
Doping techniques of SubPc/C60 heterostructure based solar cells were studied. We found Ca is a good dopant for C60 films; the electric conductivity was improved by three orders of magnitude by Ca doping with molar ratio of 0.2. The effective dopant for SubPc films, on the other hand, was MoO3. But the improvement of the electric conductivity was only one order of magnitude even though huge amount of MoO3 was added. To understand this phenomena, we studied electrical properties of both films by ultraviolet photoelectron spectroscopy. It was found that SubPc thin films showed highly dense tail states due to the disturbance of SubPc films. Thus, the improvement of the structural properties of the SubPc thin films is a key of high-quality impurity-doped solar cell.
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