Wen‐Hao Chang, A. Chou, Wen-Yen Chen, Hsiang-Szu Chang, T. Hsu, Z. Pei, P. Chen, S. Lee, L. Lai, S. Lu, M. Tsai
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Room-temperature electroluminescence at 1.3 and 1.5 /spl mu/m from Ge/Si quantum-dot light-emitting diode
We report RT EL from Ge/Si QD light-emitting diodes (LED). The LEDs were fabricated in mesa-type structure, with silicon oxide layer on the top for surface/side wall passivation. Different passivation processes have been employed. We found that the EL intensities are relatively less sensitive to temperature in the range of 80 to 300 K. At RT, an internal quantum efficiency up to 0.015 % has been achieved.
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