Effects of different counter electrodes on performance of CdSeTe alloy QDSSC

Quantum Dot Sensitized Solar Cells (QDSSC) is one of the most focused energy sources among the 3rd generation energy sources with the theoretically promised energy conversion efficiency. Even though the experimental studies have been far from the maximum efficiency that should be obtained theoretically, efficiency continues to increase rapidly with new application and treatment methods. One of the problems to be solved in QDSSC technology is the selection of the counter electrode (CE) and electrolyte that is compatible with the synthesized QD, and the studies on this subject are limited compared to other studies. In this study, CdSeTe QDSSCs were designed in combination with 3 different CE (Au, Pt, Cu2S) and 2 different electrolytes (triiodide, polysulfide) and the effects of CEs on QDSSC performance were compared. As a result of the study, it was determined that the use of Cu2S CE/polysulfide electrolyte in the design of CdSeTe QDSSS increased PCE up to 1.408%. The highest filling factor (FF) and highest V-oc values were obtained by Pt CE/triiodide electrolyte in these studies and these values were 60.664% and 0.730 V, respectively.