Open-Circuit Photovoltage Exceeding 950 mV with an 840 mV Average at SbS-Thianthrene Junctions Enabled by Thioperylene Anhydride Back Contacts.

Covalently attached perylene monolayers serve as back contacts for SbS photoelectrochemical cells with a thianthrene front, rectifying contact. Covalent attachment of perylenetetracarboxylic dianhydride, PTCDA, to Si(111) utilizes an anhydride-to-imide conversion at surface-attached amines. For SbS solar absorbers, we hypothesized that a terminal thioperylene anhydride, i.