What is PN Junction
A PN junction is a fundamental component, specifically in the operation of LED lights. It refers to the junction formed between a P-type semiconductor and an N-type semiconductor. In this junction, the P-type semiconductor contains an excess of positively charged holes, while the N-type semiconductor has an excess of negatively charged electrons. When a current passes through the PN junction, the electrons from the N-type region are pushed towards the P-type region, where they recombine with the holes. This recombination process releases energy in the form of light, resulting in the emission of photons.
Maybe You Are Interested In
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- Neutral Wire Required
- Fits the US 1-Gang wall box
- Occupancy mode
- 100V ~ 265V, 5A
- Neutral Wire Required
- 1600 sq ft
- Voltage: DC 12v/24v
- Mode: Auto/ON/OFF
- Time Delay: 15s~900s
- Dimming: 20%~100%
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- Neutral Wire Required
- Fits the UK Square backbox
- Voltage: DC 12V
- Length: 2.5M/6M
- Color Temperature: Warm/Cold White
- Voltage: DC 12V
- Length: 2.5M/6M
- Color Temperature: Warm/Cool White
- Voltage: DC 12V
- Length: 2.5M/6M
- Color Temperature: Warm/Cool White
- Voltage: DC 12V
- Length: 2.5M/6M
- Color Temperature: Warm/Cold White
- Occupancy mode
- 12V ~ 24V, 5A
- Neutral Wire Required
- 1600 sq ft
- Voltage: DC 12v/24v
- Day/Night Mode
- Time delay: 15min, 30min, 1h(default), 2h
- Occupancy, Vacancy, ON/OFF mode
- 100~265V 5A
- Neutral Wire Required
- Fits the US 1-Gang wall box
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- Neutral Wire Required
- Fits the US 1-Gang wall box
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- Neutral Wire Required
- Fits the European round backbox
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- Requires Hot wire, Load wire
- No Neutral/Ground Wire Required
- Fits the US 1-Gang wall box
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- No Neutral/Ground Wire Required
- Fits the UK square pattress box
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- Hot Wire, Load Wire Required
- No Neutral/Ground Wire Required
- Fits the European round backbox
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- Requires Hot wire, Load wire
- No Neutral/Ground Wire Required
- Fits the US 1-Gang wall box
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 10A
- Neutral Wire Required
- Fits the US 1-Gang wall box
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 5A
- Neutral Wire Required
- Fits the US 1-Gang wall box
- Occupancy, Vacancy, ON/OFF mode
- 100~265V, 10A
- Ground Wire Required
- Fits the US 1-Gang wall box
The materials used in the PN junction determine the wavelength and color of the emitted light. Different combinations of P-type and N-type semiconductors can produce various colors of light. For instance, blue LEDs typically utilize a gallium nitride (GaN) material for the N-type region and a magnesium-doped gallium nitride (Mg-doped GaN) material for the P-type region. The recombination of electrons and holes in these materials leads to the emission of blue light.
Frequently Asked Questions
What Is the Difference Between LED and PN Junction
An LED and a PN junction both consist of a PN junction, but the difference lies in the fact that the PN junction of an LED is covered with a transparent material. This covering serves to direct the emitted light from the junction when it is forward biased.
What Does PN Mean in Electrical
A P-N junction diode is a fundamental semiconductor component that regulates the movement of electric current within a circuit. It consists of a positive (p) side and a negative (n) side.
English 
German 
French 
Spanish 
Portuguese 
Korean 
Indonesian 
Russian 
Arabic 
Japanese 
Turkish 
Italian 
Dutch