quantum efficiency

Quantum efficiency refers to the effectiveness of a device, such as a solar cell or a camera sensor, in converting incoming light (photons) into usable electrical energy (electrons). It is expressed as a percentage, indicating how many photons striking the device result in electron production. For example, if a solar cell has a quantum efficiency of 80%, it means that 80 out of every 100 photons lead to the generation of electricity. Higher quantum efficiency means a device is better at harnessing light, which is crucial for improving the performance of technologies in energy, imaging, and other applications.