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GATE XE 2024 | Question: 47

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In a typical light emitting diode (LED), which of the following type(s) of materials is/are used?

  1. Indirect bandgap semiconductor with transition metal impurities
  2. Direct bandgap semiconductor
  3. Indirect bandgap semiconductor with isoelectronic impurities
  4. Indirect bandgap semiconductor without any impurity

     

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