Оцените презентацию от 1 до 5 баллов!
Тип файла:
ppt / pptx (powerpoint)
Всего слайдов:
18 слайдов
Для класса:
1,2,3,4,5,6,7,8,9,10,11
Размер файла:
650.42 kB
Просмотров:
77
Скачиваний:
0
Автор:
неизвестен
Слайды и текст к этой презентации:
№1 слайд![](/documents_6/aceb216587813b185c8bf961903c6886/img0.jpg)
№2 слайд![Intrinsic Semiconductor](/documents_6/aceb216587813b185c8bf961903c6886/img1.jpg)
Содержание слайда: Intrinsic Semiconductor
Semiconductor in pure form is known as Intrinsic Semiconductor.
Ex. Pure Germanium, Pure Silicon.
At room temp. no of electrons equal to no. of holes.
№3 слайд![Intrinsic semiconductor](/documents_6/aceb216587813b185c8bf961903c6886/img2.jpg)
Содержание слайда: Intrinsic semiconductor energy band diagram
Fermi level lies in the middle
№4 слайд![Extrinsic Semiconductor When](/documents_6/aceb216587813b185c8bf961903c6886/img3.jpg)
Содержание слайда: Extrinsic Semiconductor
When we add an impurity to pure semiconductor to increase the charge carriers then it becomes an Extrinsic Semiconductor.
In extrinsic semiconductor without breaking the covalent bonds we can increase the charge carriers.
№5 слайд![Comparison of semiconductors](/documents_6/aceb216587813b185c8bf961903c6886/img4.jpg)
Содержание слайда: Comparison of semiconductors
Intrinsic Semiconductor
1. It is in pure form.
2. Holes and electrons are equal.
3. Fermi level lies in between valence and conduction Bands.
4. Ratio of majority and minority carriers is unity.
№6 слайд![Comparison between n-type and](/documents_6/aceb216587813b185c8bf961903c6886/img5.jpg)
Содержание слайда: Comparison between n-type and p-type
semiconductors
N-type
Pentavalent impurities
are added.
Majority carriers are electrons.
Minority carriers are
holes.
Fermi level is near the conduction band.
№7 слайд![N-type Semiconductor When we](/documents_6/aceb216587813b185c8bf961903c6886/img6.jpg)
Содержание слайда: N-type Semiconductor
When we add a pentavalent impurity to pure semiconductor we get n-type semiconductor.
№8 слайд![P-type Semiconductor When we](/documents_6/aceb216587813b185c8bf961903c6886/img7.jpg)
Содержание слайда: P-type Semiconductor
When we add a Trivalent impurity to pure semiconductor we get p-type semiconductor.
№9 слайд![In addition to this, some of](/documents_6/aceb216587813b185c8bf961903c6886/img8.jpg)
Содержание слайда: In addition to this, some of the covalent bonds break due temperature and electron hole pairs generates.
In addition to this, some of the covalent bonds break due temperature and electron hole pairs generates.
Holes are majority carriers and electrons are minority carriers.
№10 слайд![P and N type Semiconductors](/documents_6/aceb216587813b185c8bf961903c6886/img9.jpg)
Содержание слайда: P and N type Semiconductors
№11 слайд![Comparison of semiconductors](/documents_6/aceb216587813b185c8bf961903c6886/img10.jpg)
Содержание слайда: Comparison of semiconductors
Intrinsic Semiconductor
It is in pure form.
Holes and electrons are equal.
Fermi level lies in between valence and conduction Bands.
№12 слайд![Conduction in Semiconductors](/documents_6/aceb216587813b185c8bf961903c6886/img11.jpg)
Содержание слайда: Conduction in Semiconductors
Conduction is carried out by means of
1. Drift Process.
2. Diffusion Process.
№13 слайд![](/documents_6/aceb216587813b185c8bf961903c6886/img12.jpg)
№14 слайд![](/documents_6/aceb216587813b185c8bf961903c6886/img13.jpg)
№15 слайд![P and N type Semiconductors](/documents_6/aceb216587813b185c8bf961903c6886/img14.jpg)
Содержание слайда: P and N type Semiconductors
№16 слайд![Formation of pn diode](/documents_6/aceb216587813b185c8bf961903c6886/img15.jpg)
Содержание слайда: Formation of pn diode
№17 слайд![Semiconductor diodes](/documents_6/aceb216587813b185c8bf961903c6886/img16.jpg)
Содержание слайда: Semiconductor diodes
№18 слайд![Thanks for attention!!!](/documents_6/aceb216587813b185c8bf961903c6886/img17.jpg)
Содержание слайда: Thanks for attention!!!