Compared with conventional (n-i-p) structures, inverted (p-i-n) perovskite solar cells offer advantages such as simpler fabrication, weaker hysteresis, and greater suitability for flexible substrates and tandem devices. As a result, inverted perovskite solar cells have attracted widespread attention in recent years.

Common hole transport materials used in inverted perovskite solar cells include PEDOT:PSS, PTAA, Poly-TPD, and NiOx. Compared with organic materials, NiOx offers advantages such as good stability and low cost. With the maturation of inverted device fabrication processes and continuous efforts in developing nickel oxide transport layers—especially the widespread adoption of pre-synthesized nickel oxide nanoparticles for preparing dense NiOx films—the performance of NiOx-based inverted devices has been greatly improved.

J&K Scientific consistently supplies nano nickel oxide powder, with the following product advantages:

• Dedicated application: Specifically designed for perovskite solar cells, especially inverted and tandem perovskite solar cells

• Simple solvent system: Soluble in water/isopropanol mixed solvents

• Tunable thickness: Concentration can be adjusted on demand

• Tunable energy level: Achieved simply by annealing

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