Synthetic MoS2 crystals have been I2 (iodine) intercalated to achieve p-type doping.
High purtiy WS2 crystals have been I2 (iodine) intercalated to achieve p-type doping.
Natural MoS2 is an indirect gap semiconductor (1.2 eV) but becomes highly luminescent in the monolayer from at 1.9 eV (quasi-particle / optical band gap).
Tungsten disulfide (2H-WS2) crystals are extremely rare in nature and are less than 10 microns in the quartz / MoS? matrix.
Zirconium disulfide (ZrS?) is an indirect gap layered semiconductor in the bulk and becomes direct gap semiconductor in monolayer form.
Zirconium disulfide (ZrS?) is an indirect gap layered semiconductor in the bulk and becomes direct gap semiconductor in monolayer form.
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