The band structures of the transition metal dichalcogenides (TMD's) 2H-MoS(0001) and 2H-WSe(0001), before and after palladium adsorption, were investigated through angle-resolved photoemission. Palladium adsorption on 2H-MoS(0001) is seen to result in very different band shifts than seen for palladium on 2H-WSe(0001). The angle resolved photoemission results of palladium adsorbed on WSe(0001) indicate that palladium accepts electron density from substrate. The resulting band shift will lead to a decrease in the barriers to the hole injection. The opposite band shifts occur upon palladium adsorption between 2H-MoS(0001). The overall trend is consistent with the deposition of other metals deposited on TMD's, except that for palladium adsorption on MoS(0001), there is an increase in the MoS(0001) substrate band gap with palladium adsorption, as is evident from the combination of photoemission and inverse photoemission.
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