Method of forming upper electrode of nanowire array and nanowire array with upper electrode formed

A method of forming an upper electrode of a nanowire array in which a plurality of nanowires are arranged on a substrate having a plate shape, the method comprising:

• a step of placing a polymeric thin film layer (S10), heating the nanowire array and placing a polymeric thin film layer on the heated nanowire array;
• a step of pressing (S20), applying pressure to the polymeric thin film layer placed on the nanowire array in the step of placing the polymeric thin film layer (S10);
• a step of treating a mixed solution (S30), dipping the nanowire array having the polymeric thin film layer pressed thereon in the mixed solution and removing a portion of the polymeric thin film layer;
• a step of etching (S40), etching the polymeric thin film layer so that a portion of the nanowires passes through the polymeric thin film layer and is exposed to the outside;
• and
• a step of depositing an electrode material (S50), depositing an electrode material on the nanowire exposed to the outside in the step of etching (S40).