Abstract
CD phosphors are well light up in solution but tend to undergo powder-based solid-state aggregation quenching. Solid-state aggregation quenching is an important flaw in LED applications. Moreover, most one-component, white CD phosphors are obtained using doping of various valences of N. White CDs that are not doped with N have yet to be reported. In this work, we attempted to develop white aluminum triacetylacetone-doped CDs (Al-CDs) phosphors with resisted solid-state aggregation quenching for LED applications. The Al-CDs do not contain N element and emit broadband white light from 420 to 800 nm, and their emission centers can redshift or blueshift with increasing contents of aluminum triacetylacetone. Al-CDs phosphors exhibit excellent luminescent stability at high temperature (570 K) and under natural conditions (80 days). Their afterglow time increases as the concentration of aluminum triacetylacetone increases and can reach 10 seconds. In addition, the luminescent mechanism and temperature-sensitive properties of the Al-CDs phosphors were investigated.
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