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Solar Energy Integration System

Solar Energy Integration System


Principal Investigator: Professor Ching-Ting Lee (Electrical Engineering)

Brief description of top-tier research results:

  • A significant improvement in conversion efficiency was achieved, from 5.78% to 7.36%, with the short current increasing from 11.31 mA/cm2 to 15.94 mA/cm2. In addition, an a-Si solar cell was fabricated with a nano-pattern and nanostructure.

  • Using inkjet technology, Sn3.0Ag0.5Cu alloys were deposited on the aluminum back electrodes of solar cells. The results showed that the appropriate peel strength was achieved with at least 200 μm dot spacing of lead-free solder, and the loss in conversion efficiency was about 2%. At the dot spacing of 100 μm, the loss in conversion efficiency was less than 1%.

  • Developed the world’s highest output tilt InN nanorod arrays and different carrier concentrations of GaN nanorod array structure piezoelectric nano generators, as well as a Mn-doped GaN intermediate band third generation solar battery.

  • Developed flexible solar cells with a conducting polymer as the substrate, which could be widely used in flexible electronics. The project is now developing nano-composite films with high hardness, transparency, flexibility, and conductivity. This project has also successfully established the technology needed to fabricate flexible solar cells with efficiencies of up to 8.9%.


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