Nonradiative transition mechanism on the surface of nanocrystallineLa0.8Sr0.2FeO3probed by photoacoustic and surface photovoltaic technique

Cooperative effect of La-doping and template on surface photoelectron characteristics of mesoporous nano-TiO2

“…3-5, while less of it was involved in producing the PA signals that appeared in the 300-400 nm region in Fig. 6, because of the complementary relationship of energy conversion between photoacoustic and photovoltaic effects [33] and (2) the effect of the template and La-doping on the nonradiative de-excitation processes, which resulted in the PA signals at 300-400 nm and was closely related to the band-band transition, was not evident because there was no obvious difference among the intensities of the PA signals of all five samples in the 300-400 nm region in Fig. 6.…”