Table 2.

The 2D material candidates for LEDs operation.

2D Materials	Bandgap (eV)	Wavelength (μm)	Luminous Mode	Ref.
BP	0.3~1.5	0.83~4.13	photoluminescence	[185]
2D Ruddlesden–Popper perovskites	1.53	0.81	photoluminescence	[198]
GDY	0.46~1.10	1.12~2.69	photoluminescence	[141]
Er-doped MoS2	0.8	1.55	electroluminescence	[190]
WSe2	1.0~2.4	0.51~1.24	electroluminescence	[201]