Method for manufacturing a perovskite solar cell with an improved hole transport layer and a perovskite solar cell with an improved hole transport layer manufactured by the same method

A method for manufacturing a perovskite solar cell comprising the steps of:

• (S1) applying a) an oxidative agent, b) ultraviolet light and ozone, c) oxygen plasma, or d) nitrogen dioxide gas to a hole transport layer (HTL) of a laminate in which a substrate layer, a first electrode layer, and the hole transport layer (HTL) containing a metal oxide are sequentially laminated, to oxidize the metal oxide;
• and
• (S2) sequentially laminating a perovskite layer, an electron transport layer, and a second electrode layer on the hole transport layer of the laminate,
• wherein the step S1 further comprises treating the hole transport layer with a solution containing the oxidative agent to oxidize the metal oxide, and then removing a solvent included in the solution.

A method for manufacturing a perovskite solar cell comprising the steps of:

• (S1) applying a) an oxidative agent, b) ultraviolet light and ozone, c) oxygen plasma, or d) nitrogen dioxide gas to a hole transport layer (HTL) of a laminate in which a substrate layer, a first electrode layer, and the hole transport layer (HTL) containing a metal oxide are sequentially laminated, to oxidize the metal oxide;
• and
• (S2) sequentially laminating a perovskite layer, an electron transport layer, and a second electrode layer on the hole transport layer of the laminate,
• wherein the metal oxide in the step S1 may be NiOx,
• wherein, in the step S1, the NiOx is oxidized to oxidize a part of Ni2+ included in the hole transport layer to Ni3+.