Abstract: The present invention relates to a method for manufacturing a perovskite solar cell and a perovskite solar cell manufactured thereby and, more specifically, to a method for manufacturing a perovskite solar cell and a perovskite solar cell manufactured thereby, wherein the method comprises 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.

Abstract: The present invention relates to a method for manufacturing a perovskite solar cell and a perovskite solar cell manufactured thereby and, more specifically, to a method for manufacturing a perovskite solar cell and a perovskite solar cell manufactured thereby, wherein the method comprises 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.

Abstract: Disclosed are a service providing method using an access card, a service filtering method, and a device for performing same. The service providing method using an access card relates to a method in which a filtering condition is set in an application service by an account of a partner terminal, and the application service can be used when an access card issued to a user terminal meets the filtering condition. The service filtering method using an access card relates to a method in which a processing result for the application service is determined on the basis of the filtering condition set in the application service by the partner terminal and the access card issued to the user terminal.

Abstract: Disclosed are an access card processing method and an apparatus for performing the method. The access card processing method may, if a produced access card is issued by a partner terminal and then transferred/retransferred, or a user terminal holding the access card returns the access card, or the access card is retrieved by the partner terminal, provide a message related to the transfer/return/retrieval so as to enable a situation regarding the transfer/return/retrieval to be recognized.

Abstract: Disclosed are an access card processing method and an apparatus for performing the method. The access card processing method may, if a produced access card is issued by a partner terminal and then transferred/retransferred, or a user terminal holding the access card returns the access card, or the access card is retrieved by the partner terminal, provide a message related to the transfer/return/retrieval so as to enable a situation regarding the transfer/return/retrieval to be recognized.

Abstract: The present invention relates to a method for manufacturing a perovskite solar cell and a perovskite solar cell manufactured thereby and, more specifically, to a method for manufacturing a perovskite solar cell and a perovskite solar cell manufactured thereby, wherein the method comprises 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.

Abstract: Disclosed is a method of processing item sales information by an electronic apparatus, the method including obtaining a purchase request, which includes item information related to an item selected by a user and information related to a payment option, providing, when the item information corresponding to the item and the information related to the payment option satisfy a first condition, the user with a purchase response, which includes approval information corresponding to the purchase request, in response to the purchase request, prior to payment of the item by the user through the payment option, generating release request information for the item, and generating settlement information corresponding to the cost of the item, wherein the cost of the item is settled with the seller on the basis of the settlement information.