The most common counter electrode materials used for in Quantum dot sensitized solar cells (QDSSCs) quickly become poisoned by sulfide, resulting in significant current drops, which lowers solar cell efficiencies and makes them unsuitable for long-term use in a device. Also, some of these materials are rare and expensive, so replacing them with an inexpensive, earth-abundant material is a desirable goal. This invention uses a Mo foil to produce the desired uniform growth of Molybdenum (IV) disulfide (MoS2) petals from the Mo foil, making the foil both the source of Mo as well as the substrate. This petaled MoS2 electrode shows a vastly improved polysulfide reduction compared to Glassy Carbon, ordinary Mo foil, Pt and Au. The petaled MoS2 electrode lost only 0.63% of its initial current density at -1 V whereas Pt lost 13.58% after only five scans, indicating the petaled MoS2 films are highly stable as cathodes. The technology was tested in a solar device setting, using standard photoanodes to test the efficiency of a device employing petaled MoS2 as its cathode. Devices in which a petaled MoS2 cathode was used achieved nearly fivefold improvement in efficiency over those employing a Pt cathode.