Perovskite solar cells through active layer engineering with metal sulfides

초록

The remarkable power conversion efficiency (PCE) and low fabrication costs of perovskite solar cells (PSCs) have made them a promising candidate for renewable energy technologies. In this work, we explore the integration of metal sulfide compounds, namely iron disulfide (FeS2) and manganese sulfide (MnS), into the active layer (AL) of MAPbI3-x(SCN)x-based perovskite structures, with potential uses in X-ray photodetectors and PSCs. The performance of the AL is greatly improved by the addition of MnS and FeS2. The PCE increases to 15.79% with FeS2 and then to 16.82% with MnS in comparison to the pristine AL (PCE = 12.59%). An in-depth examination shows that the addition of MnS results in significant increases in fill factor (FF), open-circuit voltage (VOC), short-circuit current density (JSC), and decreased sheet resistance (RS), all of which contribute to the increased efficiency. These improvements are ascribed to the MnS nanoparticles' superior interfacial charge transport within the perovskite matrix, decreased trap-assisted recombination, and enhanced charge carrier mobility. There is a lot of promises for improving PSC performance and reliability with the use of MnS in particular. Additionally, the exceptional X-ray sensitivity of 5.06 mA/(Gy·cm2) achieved by the MAPbI3-x(SCN)x@MnS (2%) composite suggests that it is suitable for X-ray detection. © 2026 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

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