Ex.48.DETERMINATION OF PLANCK CONSTANT BASED ON CURRENT-VOLTAGE CHARACTERISTICS OF LEDS

Planck’s constant equal…

Semiconductor devices defined by their ability to emit electromagnetic radiation in the visible spectrum when sufficient bias is applied are...

If the crystalline array of silicon (with four valence electrons) is “doped” (mixed with an impurity) with arsenic, which has five valence electrons, its electronic property will change.  This is called an...

If the crystalline array of silicon (with four valence electrons) is “doped” (mixed with an impurity) with boron, which has three valence electrons, its electronic property will change. This is called...

If a sufficient positive voltage (forward bias) is applied between the two ends of the p-n junction, it can supply free electrons an d holes with extra energy that they require to cross the junction as the width of the depletion layer around the p-n junction is...

Applying a negative voltage (reverse bias) results in the free charges being (1) from the junction, (2) the depletion layer width.

Applying reverse bias has the effect of (1) the effective resistance of the junction itself thus in (2) current flow through the diode.

When we connect the LED to an external voltage in the forward bias direction, the height of potential barrier across the p-n junction is...

The LED starts glowing at a particular voltage when height of the potential barrier...

The Planck constant can be calculated using the following equation:

Which zone in the picture corresponds to Depletion zone?