P‐209: Late‐News Poster: Ordered and Coplanar Chain Conformation of Polyfluorenes by Adopting Solvent Vapor Treatment Process for Enhanced Color Purity in Polymer Light Emitting Diode. - Kim, Chi-Heon; Park, Ji-sub; Kim, Byeonggon; Ko, Jeong-Hoon; Jang, Dong Hoon; Kim, Hak-Rin (SID Symposium Digest of Technical Papers, 2018)