Semiconductor LED External Quantum Efficiency Calculator
Infer observed LED external quantum yield from actual power/current and independently matched spectral mean photon energy, not internal lifetime yield or wall-plug efficiency; no electrical/optical safety.
Description
LED external quantum yield compares emitted photons with injected electrons.
LED external quantum yield compares emitted photons with injected electrons.1
Matched mean photon energy connects optical power to photon rate and differs from electrical-to-optical power efficiency.
When to use Semiconductor LED External Quantum Efficiency Calculator
Use this tool when you need to calculate the stated measurement summary or conditional model from matched observations. Prepare independently matched device or specimen measurements, units, branch selection, and model or calibration conventions.
How to use Semiconductor LED External Quantum Efficiency Calculator and understand its results
- Prepare independently matched device or specimen measurements, units, branch selection, and model or calibration conventions.
- Enter observedOpticalWatts, observedLedCurrentAmps, callerMatchedMeanPhotonEnergyJ, callerElementaryChargeC, following the field table and calculation rules below, then run the tool.
- Read observedExternalPhotonPerElectron. Use the output table and calculation rules below to interpret units, signs, crossings, and flags.
- Correct any input issues and run again. Before using a successful result, review its units, signs, evidence coverage, and stated model or reference assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedOpticalWatts | Observed optical watts | number | Required |
| observedLedCurrentAmps | Observed LED current amps | number | Required |
| callerMatchedMeanPhotonEnergyJ | Caller matched mean photon energy j | number | Required |
| callerElementaryChargeC | Caller elementary charge c | number | Required |
Require nonnegative emitted power and positive current, photon energy, and elementary charge. Divide power by photon energy and current by charge, then take the ratio. Values above one are retained rather than clipped.
yield=Poptical×q/(Ephoton×I) Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedExternalPhotonPerElectron | Observed external photon per electron | number |
{
"input": {
"observedOpticalWatts": 1,
"observedLedCurrentAmps": 1,
"callerMatchedMeanPhotonEnergyJ": 2e-19,
"callerElementaryChargeC": 1.6e-19
},
"output": {
"observedExternalPhotonPerElectron": 0.7999999999999999
}
}Limitations and assumptions
Measurements, branch identification, units, and model applicability must be independently established. Results do not supply universal material constants, a complete physical model, or operating-condition approval.
Missing required fields, unknown fields, wrong types, and violated calculation rules return input issues. Numeric values must be finite; nonfinite numeric outputs are rejected.
Alternative or Complementary methods
For a related task, use Semiconductor Photodiode Quantum Efficiency Calculator: Photodiode quantum yield compares collected electrons with incident photons after subtracting dark current. Photon energy and the charge convention must match the measurement, and a signed result exposes background or calibration inconsistencies. For a complementary step, use Semiconductor Edge Emitting Laser Slope Efficiency Vs Temperature Calculator: Laser slope efficiency can vary with temperature on an independently matched operating branch. A measured calibration supplies response values and local slopes without an assumed photon-energy efficiency model.
References
Similar or alternative tools
- Semiconductor Photodiode Quantum Efficiency Calculator
Photodiode quantum yield compares collected electrons with incident photons after subtracting dark current. Photon energy and the charge convention must match the measurement, and a signed result exposes background or calibration inconsistencies.
- Semiconductor Edge Emitting Laser Slope Efficiency Vs Temperature Calculator
Laser slope efficiency can vary with temperature on an independently matched operating branch. A measured calibration supplies response values and local slopes without an assumed photon-energy efficiency model.