Table 1 Photoluminescence lifetime and quantum yield (QY) of carbon colloids fabricated at 130, 160, 200 and 240°C. The highest QY was achieved at 160°C

From: Engineering surface states of carbon dots to achieve controllable luminescence for solid-luminescent composites and sensitive Be2+ detection

Sample

τ1 (ns)

τ2 (ns)

τave (ns)

QY %

130°C

6.78

--

6.78

35.4

160°C

7.13

--

7.13

44.7

200°C

2.81

10.41

6.12

28.1

240°C

3.51

9.85

5.21

20.8