Red light-emitting diodes are made from GaAs and GaP solid solutions, GaPxASt-x (see
Chapter 12, Problem 12.26(choose chapter or problem)
Red light-emitting diodes are made from GaAs and GaP solid solutions, GaPxASt-x (see exercise 12.25). The original red LEDs emitted light with a wavelength of 660 nm. If we assume that the band gap varies linearly with composition between x = 0 and x = 1, estimate the composition (the value of x) that is used in these LEDs.
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