Figure 5 | Scientific Reports

Figure 5

From: Strong infrared photoluminescence in highly porous layers of large faceted Si crystalline nanoparticles

Figure 5

Porosity.

(a) Superlinear PL yield, as obtained at 0.85 eV, for the octahedral Si NP’s of three different sizes (~80, 110 and 140 nm) under 2.33 eV continuous wave excitation. (b) Volume representation and (c) central slice of a sample formed by agglomerated octahedral Si NP’s. (d) Volume representation and (e) central slice of a sample made from the agglomeration of irregular Si NP’s. (e) The central slice of the irregular Si NP’s showing the degree of compactness and the noticeable smaller porosity.

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