Question

Почему электропроводность полупроводников измеряют при слабом освещении, почти в темноте?

Answer 1

НАВЕРНО ПОТОМУ ЧТО СВЕТ ТОЖЕ ОКАЗАВАЕТ ОЧЕНЬ МАЛЕНЬКОЕ ДАВЛЕНИЕ НА ФИЗИЧЕСКОЕ ТЕЛО(А ЭТОГО НАВЕРНО НЕНУЖНО)

Answer 2

В физике есть такое понятие как фотоэффект. Так вот: при попадании фотонов на поверхность полупроводника, они начинают выбивать из металла электроны, которые в свою очередь создают ток в проводнике.

Answer 3

Why is the electrical conductivity of semiconductors measured in weak light, almost in the dark?

The electrical conductivity of semiconductors is measured in weak light or almost in the dark because light can significantly affect the behavior of semiconductors. When light is shone on a semiconductor, it can generate electron-hole pairs, which can alter the conductivity of the material. By measuring the electrical conductivity in weak light or almost in the dark, researchers can obtain more accurate and consistent results that are not influenced by external factors such as light.

Semiconductor Behavior in Light: - Semiconductors can generate electron-hole pairs when exposed to light, which can affect their conductivity. - The presence of light can lead to changes in the number of charge carriers in the semiconductor, impacting its conductivity.

Importance of Measurement Conditions: - Measuring the electrical conductivity in weak light or almost in the dark helps to isolate the intrinsic behavior of the semiconductor from external influences such as light. - This approach allows for more precise and reliable measurements of the intrinsic electrical properties of the semiconductor material.

In summary, measuring the electrical conductivity of semiconductors in weak light or almost in the dark is crucial for obtaining accurate and consistent results that reflect the intrinsic behavior of the material, free from the influence of external factors such as light.