In this work, we use charge extraction via organic overlayer deposition to lower the chemical
potential of topological insulator (TI) Bi 2 Se 3 thin films into the intrinsic (bulk-insulating)
regime. We demonstrate the tuning and stabilization of intrinsic topological insulators at high
mobility with low-cost organic films. With the protection of the organic charge extraction
layers tetrafluorotetracyanoquinodimethane or tris (acetylacetonato) cobalt (III)(Co (acac) 3),
the sample is stable in the atmosphere with chemical potential∼ 135 meV above the Dirac …