Journal
ACS CENTRAL SCIENCE
Volume 3, Issue 6, Pages 654-661Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscentsci.7b00165
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Funding
- MRSEC program of the National Science Foundation [DMR 1121053]
- Dow Chemical Company through the Dow Materials Institute at UCSB
- Alexander von Humboldt foundation
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A light-mediated methodology to grow patterned, emissive polymer brushes with micron feature resolution is reported and applied to organic light emitting diode (OLED) displays. Light is used for both initiator functionalization of indium tin oxide and subsequent atom transfer radical polymerization of methacrylate-based fluorescent and phosphorescent iridium monomers. The iridium centers play key roles in photocatalyzing and mediating polymer growth while also emitting light in the final OLED structure. The scope of the presented procedure enables the synthesis of a library of polymers with emissive colors spanning the visible spectrum where the dopant incorporation, position of brush growth, and brush thickness are readily controlled. The chain-ends of the polymer brushes remain intact, affording subsequent chain extension and formation of well-defined diblock architectures. This high level of structure and function control allows for the facile preparation of random ternary copolymers and red-green-blue arrays to yield white emission.
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