“…Carbon materials are playing significant roles in the development of materials science. Most recently, as a new member of the carbon family, carbon dots (CDs) have emerged and aroused research hotspots in many fields, including biomedicine, 1,2 chemical sensors, 3–6 photocatalysis 7,8 and photoelectric devices, 9,10 due to their excellent and tunable fluorescence properties, abundant low-cost sources, low toxicity, appreciable biocompatibility and high thermal stability. In particular, the rich optical and electronic properties of CDs, which include tunable photoluminescence (PL), 11 extraordinary up-converted PL 12 and outstanding photo-induced electron transfer, 13 have attracted considerable interest in the photoelectric applications of white-light-emitting diodes (WLEDs).…”