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

First exciton absorption peak (nm)

Required number in nm. Wavelength of the first excitonic absorption peak, not the photoluminescence emission maximum.

The cited overview of Quantum dot supplies background for the terminology and domain context used by this tool.^[1]

Estimate CdSe quantum-dot diameter from the first excitonic absorption peak using the Yu empirical fit; photoluminescence emission peaks are not interchangeable with this calibration. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Diameter (nm)

Returned number in nm. Empirical CdSe nanocrystal diameter.

• Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
• First exciton absorption peak must be at least 400.
• First exciton absorption peak must be no greater than 650.
• 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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