Home of RF and Wireless Vendors and Resources

One Stop For Your RF and Wireless Need

LED Internal Quantum Efficiency and Power output-Definition, equation, calculator

This page describes LED Power output calculation based on LED internal quantum efficiency and other parameters. It mentions LED Quantum Efficiency vs power equation/formula and LED Power output calculator.

The fraction of the electrons that are injected into the depletion layer which results in photons getting produced is known as internal quantum efficiency of the LED. It is denoted as η.

If N is the number of electrons injected into the depletion layer every second, the power output of the device is expressed by,
P = η*N*h*v = η*I*h*v/e
I is forward current
e is the electronic charge
Hence LED Power output equation is derived as follows.

LED Power Output Calculator based on Internal Quantum Efficiency

LED Radiation ( λ) in nm (input1) :

LED forward current in mA (input2) :

Internal Quantum Efficiency, in % (input3) :

LED Power Output in mW, (Output):

*Note: Enter values in INPUT boxes and Press CALCULATE button to check OUTPUTS.

LED radiation (λ) = 900 nm,
LED forward current (mA) = 20,
Internal Quantum Efficiency (η) = 2 %
LED Power Output = 0.55 mWatt

LED Internal Quantum Efficiency Equation | LED Power Output Formula

Following LED internal quantum efficiency vs power output equation or formula is used for this calculator.

LED Internal Quantum Efficiency and Power Output Equation

Photodiode calculators and terminologies

Photodiode vs Phototransistor
Difference between Photodiode types and PIN diode
Quantum Efficiency

Useful converters and calculators

Following is the list of useful converters and calculators.

dBm to Watt converter
Stripline Impedance calculator
Microstrip line impedance
Antenna G/T
Noise temp. to NF

RF and Wireless tutorials

Share this page

Translate this page