Highly efficient solution processed nanorice structured NiS counter electrode for quantum dot sensitized solar cells

Low-cost solution processed nano millet like structure CoS2 film superior to pt as counter electrode for quantum dot sensitized solar cells

“…The approximate thickness and diameter was observed for CC-120 film also, but it is kept opaque and densely coated for CC-120 film. Adhesion between the active materials and FTO substrate plays a crucial role in determining the conversion efficiency [26] and catalytic activity. Strong adhesion of the CoS 2 thin film on FTO was observed (CC-90), which reduced peeling from the substrate and increased the performance of the cell with increased catalytic activity.…”

“…[22] The Pt CEs commonly used in DSSCs are not very active in QDSSCs because their surface activity and conductivity are suppressed as a result of strong chemisorption with sulfide ions, which is reflected in the poor photovoltaic performance of the resulting cell devices. [23] Therefore, instead of using a Pt electrode, various materials such as CoS, [24] Cu 2 S, [25] NiS, [26] PbS, [27] Cu 2 ZnSnSe 4 [28] and carbon-based materials [29] have been investigated.…”

Highly effective nickel sulfide counter electrode catalyst prepared by optimal hydrothermal treatment for quantum dot-sensitized solar cells

“…As a result, a power conversion efficiency of 2.97% was obtained with a solution-processed nanorice-structured NiS CE [32]. An h of 3.30% was obtained with an optimal-temperature NiS CE for QDSSCs [33].…”

“…In previous studies, we synthesized nickel sulfide CEs that showed excellent electrocatalytic activity and good electrical properties for the polysulfide redox reactions in QDSSCs [32,33]. As a result, a power conversion efficiency of 2.97% was obtained with a solution-processed nanorice-structured NiS CE [32].…”

Earth-abundant Cu2SnSe3 thin film counter electrode for high-efficiency quantum dot-sensitized solar cells

“…Moreover, sulfur compounds are known to chemisorb on Pt surfaces and reduce its electrocatalytic activity toward polysulfide reduction [31,32]. Prior research shows that metal sulfides such as Cu 2 S [33,34], PbS [35], CoS [36], NiS [37,38], and FeS x [39,40] exhibit high electrocatalytic activity for polysulfide redox reactions, with Cu 2 S showing the superior performance [41]. However, Cu 2 S CE was observed to induce a harmful Cu x S deposition on the surface of QDs, causing poisoning effects toward photoanode performance [41].…”