The circularly polarized luminescence (CPL) is quantified through the luminescence dissymmetry factor (glum), which is defined as the ratio of the difference of the left-and right-circularly polarized light to half of the total luminescence. CPL-active materials fabricated from AIEgens show much larger dissymmetry factors in the solid state than the molecules in solution. Significantly, (M)-SCPP [8] and (P)-SCPP [8] exhibited highly enhanced CPL signals in the aggregated state (Figure ). In a THF solution, the glum was 6.9 × 10 -3 for (M)-SCPP [8] at 554 nm and -6.1 × 10 -3 for (P)-SCPP [8] at 558nm. In a H2O/THF (90:10, v/v) solution, the |glum| is ~3-fold larger than that in solution, which is 1.9 × 10 -2 for (M)-SCPP [8] at 562 nm and -1.8 × 10 -2 for (P)-SCPP [8] at 564 nm. The results showed a high luminescence dissymmetry factor compared with many established CPL-active organic molecules, whose factors are typically in the range of 10 -3 to 10 -4 . Therefore, chiral SCPP [8] molecules have great potential in applications as CPL-active materials.