Table 1.

Energy composition of the A exciton and trions

(eV/meV)		A exciton		${\mathbf{A}}_{\mathbf{(1)}}^{\mathbf{-}}$ trion		A+ trion
	E g	ΩA	${\mathit{E}}_{\mathbf{b}}^{\mathbf{A}}$	${\mathbf{\Omega }}^{{\mathbf{A}}^{\mathbf{-}}}$	${\mathit{E}}_{\mathbf{b}}^{{\mathbf{A}}^{\mathbf{-}}}$	${\mathbf{\Omega }}^{{\mathbf{A}}^{\mathbf{+}}}$	${\mathit{E}}_{\mathbf{b}}^{{\mathbf{A}}^{\mathbf{+}}}$
Vac.	2.89	2.13	0.76	2.08	43	2.09	39
SiO2	2.75	2.12	0.63	2.08	35	2.08	32
h-BN	2.73	2.11	0.62	2.07	34	2.08	29
Au	2.25	2.08	0.17	2.05	23	2.06	21

For the A exciton and the ${\mathrm{A}}_{\left(1\right)}^{-}$ and A⁺ trions on different substrates, we give the bandgap E _g, transition energies Ω, binding energy defined as $E_{\mathrm{b}}^{\mathrm{A}}=E_{\mathrm{g}}-{\Omega }^{\mathrm{A}}$ and $E_{\mathrm{b}}^{{\mathrm{A}}_{\left(1\right)}^{-}}={\Omega }^{\mathrm{A}}-{\Omega }^{{\mathrm{A}}_{\left(1\right)}^{-}}$. All given energies are extrapolated for an infinite supercell size and an infinite k-space coverage for the BSE k-points, i.e., N → ∞ in N × N × 1. Trion-binding energies are given in meV, all other values in eV.