Photopatternable Quantum Dots Forming Quasi-Ordered Arrays
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- 作者：Jong-Jin Park ; Prem Prabhakaran ; Kyung Kook Jang ; YoungGu Lee ; Junho Lee ; KwangHee Lee ; Jaehyun Hur ; Jong-Min Kim ; Namchul Cho ; Yong Son ; Dong-Yol Yang ; Kwang-Sup Lee
- 刊名：Nano Letters
- 出版年：2010
- 出版时间：July 14, 2010
- 年：2010
- 卷：10
- 期：7
- 页码：2310-2317
- 全文大小：677K
- 年卷期：v.10,no.7(July 14, 2010)
- ISSN：1530-6992
文摘
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.