Perovskite solar cells are promising solar cell type that has been studied intensively in recent years due to their cost effectiveness, easy fabrication methods, and high conversion efficiency. The name perovskite comes from the Russian mineralist Countr Lev Peorvskite who discovered the perovskite in the Ural Mountains in 1839. The perovskite chemical formula is in the ABX3 form where A (organic/inorganic cation group) and B (metal cation group) are cations, and X (the salt elements) is an anion and used as an absorber layer in solar cell structure. In ideal cubic perovskite structure, while position A is shared by organic cations such as CH3NH3 +, CH (NH2) 2 +, or inorganic cations such as Cs +, Rb +; the smaller B position is mostly occupied by the Pb2 + (sometimes Sn2 +) cation. The X position is shared by the I-, Br- and/or Cl- salts. Perovskite is a direct band material and has a high absorption coefficient. Because of this feature, unlike Si solar cells, it allows the absorption of a large number of photons with a much thinner layer. This significantly reduces the end product cost. Another critical advantage of perovskite material is its high carrier mobility and long diffusion path (0.1-1.0 μm) [1].

Perovskite solar cell efficiencies have increased from 3.13% to 25.2% in 2020 with a single junction structure [2].

We are working on following subjects on Perovskite solar cells:

• Basic fabrication and characterization
• New hole transport material can be applied to perovskite solar cells.
• Scale-up and stability of perovskite solar cells

Researchers: Assist. Prof. Dr.  Ayşe SEYHAN

                        Res. Assist. Elif DAMGACI

Referances

[1]. Stranks, Samuel D., et al. "Electron-hole diffusion lengths exceeding 1 micrometer in an organometal trihalide perovskite absorber." Science 342.6156 (2013): 341-344.

[2]. NREL, https://www.nrel.gov/pv/cell-efficiency.html