Figure 5. a) Diagram of hand veins imaging using the high-power NIR cpc-LD. b) The red line (in Figure 5f,g,j) from top to bottom pixel brightness value varies with pixel position. c-j) Imaging of hand veins with varying LD blue light input power.

Cs2AgInCl6 lead-free double perovskite materials have potential applications in lighting and high-energy ray detection. However, the transition of Cs2AgInCl6 single crystals (SCs) are parity forbidden, resulting in low photoluminescence (PL)...