Semiconductors generate electron–hole pairs upon light absorption, but most recombine quickly. The SPV signal strength essentially reflects the competition between charge separation and recombination; a stronger signal usually means better separation and less recombination.
By examining SPV responses at different wavelengths, you can tell which spectral bands show high separation efficiency. Compared with the absorption spectrum, this also reveals intervals where "light is absorbed but not separated," guiding band-structure and interface optimization.
If the SPV is weak, try modifying the surface, introducing co-catalysts, or building heterojunctions to suppress recombination. After optimization, verify with the PLR-GSPR Atmospheric-Pressure Gas-Solid Photocatalytic Reaction System whether activity improves in step—forming a "characterization–optimization–verification" loop.
SPV is a macroscopically averaged signal; it cannot directly give spatial distribution or ultrafast dynamics, so it must be paired with transient and spatially resolved techniques.
Free consultation: Changed the material but activity won't move? First use Perfectlight's PL-SPV/IPCE1000 Steady-State Surface Photovoltage Spectrometer to see whether charge separation is the bottleneck, then decide where to optimize.
Tel: 400-1161-365 / 010-62128921 Perfectlight Official Website
It checks whether photogenerated charges separate efficiently; signal strength reflects the competition between charge separation and recombination.
By revealing which wavelengths separate well and which "absorb but don't separate," it guides band and interface optimization, then activity is verified with a reactor.
It is a macroscopically averaged signal, unable to give spatial distribution or ultrafast dynamics, so it needs transient and spatially resolved methods.
This article does not constitute a performance commitment; specific technical parameters are subject to the actual product documentation and mutual confirmation.
}}]}
