By doping Germanium with Gallium, the types of semi-conductors formed are:

1. N-type

2. P-type

3. Intrinsic

4. Extrinsic

Which of the above are correct?

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  1. 1 and 2
  2. 2 and 4
  3. 1 and 3
  4. 2 and 3

Answer (Detailed Solution Below)

Option 2 : 2 and 4
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Detailed Solution

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  • बाह्य p-प्रकार का अर्धचालक तब निर्मित होता है जब त्रिसंयोजक अशुद्धि को शुद्ध अर्धचालक में मिलाया जाता है
  • त्रिसंयोजक अशुद्धि के उदाहरण बोरोन, गैलियम और ईण्डियम हैं
  • बोरोन जैसे त्रिसंयोजक अशुद्धि में 3 संयोजी इलेक्ट्रॉन होते हैं
  • अशुद्धि के प्रत्येक परमाणु आस-पास के सिलिकॉन परमाणु के साथ सहसंयोजक बंध निर्मित करने के लिए सिलिकॉन क्रिस्टल में नियत होते हैं
  • अपमिश्रक बोरोन परमाणु में आस-पास के सिलिकॉन से एक कम इलेक्ट्रॉन होता है और इसलिए रिक्ति उत्पादित होती है जो छिद्र के रूप में कार्य करती है

 

This is explained with the help of the following atomic model:
F1 U.B. N.J. 10.09.2019 D 4

∴ By doping Germanium with Gallium, the types of semi-conductors formed are both extrinsic and p-type.

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