Room-temperature direct bandgap electroluminesence from Ge-on-Si light-emitting diodes

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Sun, Xiaochen; Liu, Jifeng; Kimerling, Lionel C.; Michel, Jurgen;

We report what we believe to be the first demonstration of direct bandgap electroluminescence (EL) from Ge/Si heterojunction light-emitting diodes (LEDs) at room temperature. In-plane biaxial tensile strain is used to engineer the band structure of Ge to enhance the dir... View more
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