Use this semiconductor calculation for first-order device, material, fabrication, interconnect, packaging, or reliability estimates when every coefficient and unit convention is known.

Optical power (mW)

Required number in mW. Emitted optical output power.

Electrical power (mW)

Required number in mW. Consumed electrical input power.

The cited overview of Light-emitting diode supplies background for the terminology and domain context used by this tool.^[1]

Compute LED wall plug efficiency as the ratio of emitted optical power to consumed electrical power. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Wall plug efficiency (%)

Returned number in %. Optical output power divided by electrical input power.

• Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
• Optical power must be at least 0.
• Electrical power must be at least 5e-324.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Compare the estimate with measured process data, current device documentation, and a higher-fidelity circuit, field, thermal, quantum, or TCAD model when the decision requires it.

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