Question

What kind of light does an indium gallium nitride diode emit?

Answer 1

Indium gallium nitride (InGaN) diodes primarily emit blue and green light, with the specific color depending on the indium (In) content:

Low indium content → emits blue or violet light (approximately 365–480 nm)

Medium indium content → emits cyan light

High indium content → emits green light (approximately 520–550 nm)

Therefore, InGaN is currently the core material for blue, cyan, and green LEDs.

Answer 2

Indium gallium nitride (InGaN) diodes primarily emit blue light. Their light-emitting principle involves adjusting the indium (In) composition to change the material's bandgap energy, thereby covering a wavelength range from ultraviolet to blue light. For example, InGaN-based laser diodes can produce blue light (approximately 450 nm) or green light (approximately 500-580 nm), and the groundbreaking technology of blue LEDs won the 2014 Nobel Prize in Physics.

Furthermore, InGaN materials can also achieve broad-spectrum emission from ultraviolet to near-infrared by combining with other compounds (such as AlGaN).