Fig. 2. Transport characterization.

a HgTe CQD Energy diagram. b, c Schematic diagram of electrochemistry and FET measurement, respectively. CE the counter electrode, RE the reference electrode, WE the working electrode. d, e Cyclic voltammetry on LWIR HgTe CQD before and after I₂ treatment at 203 K, respectively. The arrows indicate forward and backward scan direction. Red arrows show the rest potential (Fermi Level) before the scan. f, g Conductance at different potential measured by electrochemistry with bi-potentiostat before and after I₂ treatment, respectively. h, i FET transfer curve (purple lines) and differential mobility (black lines) at 80 K of HgTe CQD before and after I₂ treatment, respectively