Photoinduced phase separation inBi0.4Ca0.6MnO3thin films

Thickness-dependent photocatalytic activity of bismuth oxybromide nanosheets with highly exposed (0 1 0) facets

“…[34][35][36]The decreaseof particle size can reduce the migration time of photogenerated electrons (e -)and holes (h + ) from the interior to the surface of particles and is thus favorable for the decrease of their recombination efficiency. [37,38] For the BiOX nanosheets, the self-generated IEF along the c-axis improves the separation of photoinduced e -and h + [31,39]and accelerates the movements of e -alone the caxis, [8,13,39]which was considered as the reason for the photoactivity enhancement of BiOX nanosheets with increasing F (001) .…”

Effects of oxygen depletion on photoinduced and transport properties of thin films of charge-ordered manganites

“…Since the lattice parameter of LAO, 3.79 Å, is slightly smaller than the lattice parameter of bulk Bi 0.4 Ca 0.6 MnO 3 , V 1/3 = 3.81 Å, thin films grown on LAO are under small compressive strain. 15 Compressive strain leads to the increase in the out-of-plane lattice parameters, since in-plane lattice parameters are stretched. The relaxation of strain, which could occur under annealing, should lead in this case to the decrease in the lattice parameters, which is not observed experimentally.…”

“…Insulator-to-metal transition in manganese oxides makes these materials attractive from the point of view of creating photonic and optoelectronic devices. 5,7,14,15 However, the origin of the photoinduced effects in manganites is not well understood at present. From this perspective, it is important to better understand the origin of the photoinduced effects and to be able to control the magnitude of photoinduced changes and their lifetime.…”

“…Large photoinduced decrease in resistivity and even photoinduced insulator to metal transition in CO manganites ͑bulk and thin films͒ was found in stoichiometrical ͑fully oxygenated͒ materials. 5,14,15 These photoinduced changes in the CO manganites are attributed to the destruction of the CO by light, which leads to the delocalization of the charge carriers and increase in conductivity. In this paper, we report strong influence of oxygen content on photoinduced and transport properties of CO Bi 0.4 Ca 0.6 MnO 3 thin films.…”

Photoconductivity of CaH2-reduced BaSnO3 thin films

“…Notably, the recovery process is complete in several seconds and much shorter than that had been reported on un-doped BSO thin lm, 23 which is mostly due to the high carrier density and mobility in BSO-H thin lm. 34,35 Secondly, the recovery process reects the carrier's dynamics of recombination, and the carrier transit time (s 1 ) and the excess life-time of trapped carriers (s 2 , s 2 > s 1 ) are well-known to be the main parts of the recovery time in oxide semiconductors. 36 Therefore, the experimental data should be well tted by a double exponential function 37 (see red solid lines in Fig.…”