Both QSGW and subsequent QSG Ŵ self-consistent cycles were iterated until the root-mean-square change in the self-energy was below 1 × 10 -5 In the solution of the BSE, 8 valence and 8 conduction bands were used, with a k-mesh of 7×7×7 used for the optical spectrum, which ensured the dielectric constant (q→0) was converged to within 0.01.