Figure 1:
Figure 1:

A solar cell structure using a hetero interface and the up-conversion of the two-proton system (yellow and red arrows). The light represented by the red and yellow arrows normally passes through when only a semiconductor is used, but with this system the light is absorbed, greatly increasingly the flow of electricity.

Figure 2:
Figure 2:

Theoretical prediction of conversion efficiency. The efficiency changes in response to the use of two different bandgaps in a hetero-interface. The highest conversion efficiency is 63%.

Journal information
“Two-step photon up-conversion solar cells”

Shigeo Asahi, Haruyuki Teranishi, Kazuki Kusaki, Toshiyuki Kaizu, and Takashi Kita Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University

Nature Communications
Related Info

(Graduate School of Engineering)