Improving the Stability of Perovskite solar cells by using NiOx instead ofSpiro-OMeTAD in the HTL layer

Perovskite solar cells have long grappled with challenges related to stability, efficiency, andsometimes cost. Researchers are continually seeking optimal materials for different layers of thesecells. Replacing Spiro-OMeTAD with NiOx in the HTL layer significantly impacts both efficiencyand stability. NiOx offers superior chemical and thermal stability, enhancing the long-term durabilityof solar cells. While Spiro-OMeTAD-based cells generally achieve higher initial efficiencies, NiOxbasedcells perform comparably, with only a slight efficiency reduction (typically ۱-۳% lower).However, NiOx-based cells exhibit markedly better stability, often retaining ۲۰-۳۰% more of theirinitial efficiency after prolonged testing under continuous illumination. Thus, adopting NiOx as anHTL material can lead to more durable and robust perovskite solar cells, making it a promisingalternative to Spiro-OMeTAD(۱–۳).

Keywords:

Polymer , Perovskite , Spiro-OMeTAD , NiOx Stability