EC > GATE 2018 > PN Junction Diode
Red (R), Green (G) and Blue (B) Light Emitting Diodes (LEDs) were fabricated using p-n junctions of three different inorganic semiconductors having different band-gaps. The built-in voltages of red, green and blue diodes are VR, VG and VB, respectively. Assume donor and acceptor doping to be the same (NA and ND respectively) in the p and n sides of all the three diodes. Which one of the following relationships about the built-in voltages is TRUE?
Correct : b
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