Fig. 3.

Photothermal properties of the deposited CS layers. (A–C) Cross-section SEM images of CS with thickness of 1.5 μm (A), 5.1 μm (B), and 30 μm (C), respectively. (D) Temperature increases (∆T) of CS with different thickness under 1 sun. (Inset) Profiles of ∆T as the illumination time under 1 sun. (E) Temperature increases (∆T) of bare CS, SCS, and PSCS. (F) Infrared camera images of PSCS under 0.5 sun (f₁), 1.0 sun (f₂), and 1.5 sun (f₃), respectively. The thickness of CS, SCS, and PSCS are 30.0 μm and the temperatures were measured after illumination under 1 sun for 300 s. (Scale bars: A, B, and C, 2 μm; Scale bars: F, G, and H, 1 cm.)