Can we design efficient red LEDs?

admin Last updated on: May 8, 2023

Can we design efficient red LEDs?

  • Holonyak at GE mixed Ga+As+P – made red LED efficiency 0.1

  • c.f. Edison 2 Modern bulb 17

  • 1970 GaAsP LED efficiency = 0.2

  • 1980 AlGaAs/GaAs LED efficiency = 2

  • 1990 AlInGaP/GaAs LED efficiency = 10

  • 2000 AlInGaP/GaP LED efficiency = 100

  • 10 times increase every 10 years

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Red LEDs for Rear Bicycle Light

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