The calculated carrier mobilities of nonstoichiometric Sc₂CS and Y₂CS.

	Carrier type	Direction	C 2D (J m−2)	E 1 (eV)	m* (me)	μ (cm2 V−1 s−1)	τ (fs)
Sc2CS	Electron	x	111.98	7.03	0.70	232.59	92.58
		y	84.33	4.06	0.64	628.22	228.62
	Hole	x	111.98	2.42	3.30	88.32	165.72
		y	84.33	4.06	2.04	61.75	71.72
Y2CS	Electron	x	91.02	4.30	0.55	818.51	255.98
		y	57.66	3.95	0.58	552.55	182.23
	Hole	x	91.02	3.76	14.04	1.64	13.11
		y	57.66	2.01	6.35	17.80	64.28