Question:
The phenomenon of injection electro luminescence is the basis of working of
The phenomenon of injection electro luminescence is the basis of working of
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LEDs convert electrical energy into light via recombination.
Updated On: Jul 2, 2026
- Photodiodes
- Light Emitting Diodes
- Phototransistors
- Solar cells
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The Correct Option is B
Solution and Explanation
Concept:
Electroluminescence is emission of light due to recombination of electrons and holes.
Step 1: Injection process Electrons injected into p-region recombine with holes.
Step 2: Energy release Energy released as photons.
Step 3: Device using this effect LED works on this principle.
Step 4: Other devices Photodiodes detect light, do not emit.
Step 5: Conclusion \[ \boxed{\text{Light Emitting Diodes}} \]
Final Answer: \[ \boxed{(B)} \]
Step 1: Injection process Electrons injected into p-region recombine with holes.
Step 2: Energy release Energy released as photons.
Step 3: Device using this effect LED works on this principle.
Step 4: Other devices Photodiodes detect light, do not emit.
Step 5: Conclusion \[ \boxed{\text{Light Emitting Diodes}} \]
Final Answer: \[ \boxed{(B)} \]
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