Researchers capture first-ever images of electric charges across semiconductor materials within a solar cell

A team from the University of California Santa Barbara used ultrafast electron microscopy to record photocarriers as they diffuse across a silicon and germanium heterojunction. It is the first time the movement, which lasts picoseconds, has been captured as a moving visual. Researchers from the University of California Santa Barbara have visualized photoexcited charges traveling across the interface of two different semiconductor materials within a solar cell. In a solar cell, sunlight hits a semiconductor material causing electrons to move across two different materials, known as the heterojunction, ...

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