The invention interfacial bonding failure problem occurs because the lattice mismatch between the nanostructures formed on a flexible substrate and the by controlling the surface roughness of the flexible substrate by a plasma treatment in order to address a flexible substrate, a zinc oxide catalyst at a low temperature of less than 100 solution process on the flexible substrate using a technique of improving the interfacial bonding characteristics between ( a seed layer ) relates to a zinc oxide nano- pillar array (array) in a method of selectively growing aligned without . ; 展开▼