Premium
Novel Electrochromic Displays Using Monodisperse Viologen‐Modified Porous Polymeric Microspheres
Author(s) -
Ryu JeeHyun,
Lee JungHun,
Han SeungJin,
Suh KyungDo
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200600127
Subject(s) - viologen , electrochromism , materials science , dispersity , chemical engineering , polymer , porosity , electrolyte , electrochromic devices , polymerization , microsphere , copolymer , polymer chemistry , composite material , electrode , chemistry , photochemistry , engineering
Summary: In order to achieve a reasonable response time in an electrochromic display, viologen‐modified porous polymeric microspheres of various porosities have been used as substrates. Porous microspheres are prepared using seeded polymerization in the presence of a porogen. Based on ionic conductivity and the chronocoulometry measurements, it is confirmed that the electrolyte content increases, and the resistance of the polymer particles in the device decreases as the specific surface area of the porous particles increases. This results in a rapid response time of 270 ms.Schematic representation of the viologen‐modified porous polymeric microspheres in the manufactured ECD device (A). Images of the device (B) in the OFF state (left) and in the ON state (right).