Photocatalysis relies on a semiconductor absorbing photons to generate electron–hole pairs, and different catalysts have different band gaps, hence different excitation-wavelength requirements. If the source spectrum does not match the catalyst absorption, photon energy is either insufficient (no excitation) or excessive (dissipated as heat), both driving quantum efficiency down. The first metric for any photocatalytic light source is therefore the match between spectrum and catalyst absorption.
A complete photochemical reaction light source is not "just a lamp"—it is a combination of lamp + homogenization/light-guiding + filtering + calibration + reactor. The photochemical reaction light source should be defined together with the reactor type (gas–solid, liquid–solid, gas–liquid–solid) to fix the irradiation mode and spot size, then calibrated at the sample position with a light power meter.
Many teams look only at "wattage" and ignore spectrum and uniformity, making their results impossible to reproduce. The correct approach: determine the catalyst absorption edge first, then choose a matching source, and finally measure the actual irradiance at the sample position with an irradiance meter. Closing this loop is what produces trustworthy data.
Contact Perfectlight: Not sure which photocatalytic light source fits your catalyst? Share your catalyst band gap and reaction system, and Perfectlight will help you match the complete light-source–reactor setup.
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Semiconductors have a specific band gap; only wavelengths matching the absorption edge effectively excite. A mismatched spectrum yields low quantum efficiency or no reaction at all.
PEC emphasizes geometric coupling between the source and the electrode and illumination–current synchronization; thermo-synergy must also manage the temperature distribution and reachable temperature across the irradiated surface.
No. It is a system of lamp + homogenization/guiding + filtering + calibration + reactor; missing any link leads to uneven illumination or unknown intensity.
This article does not constitute a performance commitment; specific technical parameters are subject to the actual product documentation and mutual confirmation.
