<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>P‐doped C quantum dots (PCQDs) are prepared by solvothermal reaction of PBr<sub>3</sub> and hydroquinone in the presence of NaOH in Me<sub>2</sub>CO (autoclave, 200 °C, 1 h).</p> </abstract>