Organic Polymeric Electrochromic Devices: Polychromism with Very High Coloration Efficiency

Autor:	Gursel Sonmez, Fred Wudl, Hong Meng
Rok vydání:	2004
Předmět:	chemistry.chemical_classification Materials science General Chemical Engineering Doping General Chemistry Polymer Photochemistry Electrochromic devices Anode chemistry PEDOT:PSS Electrochromism Polymer chemistry Materials Chemistry Counterion Absorption (chemistry)
Zdroj:	Chemistry of Materials. 16:574-580
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm0301773
Popis:	The electrochromic properties of electrodeposited poly(1,4-bis(2-[3‘,4‘-ethylenedioxy]thienyl)-2-methoxy-5-2‘ ‘-ethylhexyloxybenzene) (P(BEDOT-MEHB)), a material for polymer electrochromic displays, are reported in detail. While the polymer is transparent in the fully oxidized state, two absorption bands obtained in the visible region for the neutral and partially oxidized polymer are due to two different colors from the same material. Compared to other inorganic or organic electrochromic materials, the P(BEDOT-MEHB) films exhibited very high coloration efficiency values: as high as 680 cm2/C at 535 nm and −360 cm2/C at 760 nm. The films have the advantage of exhibiting cathodic and anodic coloration. The space created by the methoxy ethylhexyloxy benzene between EDOT units on the polymer backbone makes the injection/rejection of the negatively charged counterions inside/outside of the polymer easier, resulting in higher doping levels than PEDOT at the same optical density. Very well-defined electrochemi...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ffca0a57a093522deab4b1f945d50e5 https://doi.org/10.1021/cm0301773 Zobrazit plný text záznamu