title: Photopatternable quantum dots forming quasi-ordered arrays.
abstract: We have functionalized core-shell CdSe/ZnS quantum dots (QDs) with a photosensitive monolayer, rendering them solution processable and photopatternable. Upon exposure to ultraviolet radiation, films composed of this material were found to polymerize, forming interconnected arrays of QDs. The photoluminescence properties of the nanocrystal films increased with photocuring. The material was found to be suitable for spin casting and was used as the active layer in a green electroluminescent device. The electroluminescence efficiency of devices containing a photocured active layer was found to be largely enhanced when compared to devices containing nonphotocured active layers. The material also showed excellent adhesion to both organic and inorganic substrates because of the unique combination of a siloxane and a photopatternable layer as ligands. The pristine functionalized nanocrystals could easily be used for two-dimensional patterning on organic and inorganic substrates. The photopatternable quantum dots were uniformly dispersed into a photopolymerizable resin to fabricate QD embedded three-dimensional microstructures.
authors.affiliation: Samsung Advanced Institute of Technology, Yongin-si, Gyeonggi-do, South Korea.
authors.forename: Jong-Jin
authors.initials: JJ
authors.lastname: Park
authors.forename: Prem
authors.initials: P
authors.lastname: Prabhakaran
authors.forename: Kyung Kook
authors.initials: KK
authors.lastname: Jang
authors.forename: YoungGu
authors.initials: Y
authors.lastname: Lee
authors.forename: Junho
authors.initials: J
authors.lastname: Lee
authors.forename: KwangHee
authors.initials: K
authors.lastname: Lee
authors.forename: Jaehyun
authors.initials: J
authors.lastname: Hur
authors.forename: Jong-Min
authors.initials: JM
authors.lastname: Kim
authors.forename: Namchul
authors.initials: N
authors.lastname: Cho
authors.forename: Yong
authors.initials: Y
authors.lastname: Son
authors.forename: Dong-Yol
authors.initials: DY
authors.lastname: Yang
authors.forename: Kwang-Sup
authors.initials: KS
authors.lastname: Lee