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Visible-Light Photoemission Spectroscopy Device for Development of Quantum Nano Structured Solar Cell

  • Institute of Materials and Systems for Sustainability

Toru Ujihara [Professor]

http://www.numse.nagoya-u.ac.jp/ujihara/

Outline of Seeds

We have proposed a novel angle-resolved photoemission spectroscopy to measure the conduction electrons emitted from a surface with negative electron affinity state. We call this method visible-light photoemission spectroscopy (VPS). In the present study, the conduction miniband structure formed in a superlattice was evaluated by the VPS method. As a result, we succeeded to obtain the dispersion of the miniband. In addition, the effective mass of the miniband was quantitatively determined from the observed dispersion. Therefore, we believe that VPS is a quite powerful tool for the evaluation of intermediate-band solar cells.

Novelty and originality of this research

Under the collaboration with a Japanese maker, we have successfully developed VPS method device with higher intensity and higher resolution for conduction band measurement than the current prevailing machines such as IPES, UPS/XPS, and 2PPE .

Application and research area for Industry collaboration

We can collaborate with other research institutions to develop tailor-made PVS devices of best fit to their own research and development purposes.