Details

Autor(en) / Beteiligte

• Jensen, Jacob
• Dam, Henrik F.
• Reynolds, John R.
• Dyer, Aubrey L.
• Krebs, Frederik C.

Titel

Manufacture and demonstration of organic photovoltaic-powered electrochromic displays using roll coating methods and printable electrolytes

Ist Teil von

• Journal of polymer science. Part B, Polymer physics, 2012-04, Vol.50 (8), p.536-545

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc., A Wiley Company

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Electrochromic devices (ECDs) were prepared on flexible substrates using spray coating and slot‐die coating methods. The electrochromic materials were the conjugated electroactive polymers, poly((2,2‐bis(2‐ethylhexyloxymethyl)‐propylene‐1,3‐dioxy)‐3,4‐thiophene‐2,5‐diyl) as a vibrantly colored active material (ECP‐Magenta) and poly(N‐octadecyl‐(propylene‐1,3‐dioxy)‐3,4‐pyrrole‐2,5‐diyl) as a minimally colored, charge balancing material (MCCP). Two electrolyte systems were compared to allow development of fully printable and laminated devices on flexible substrates. Devices of various sizes, up to 7 × 8 cm2, are demonstrated with pixelated devices containing pixel sizes of 4 × 4 mm2 or 13 × 13 mm2. The transmission contrast exhibited by the devices, when switched between the fully bleached and fully colored state, was 58% at a visible wavelength of 550 nm, and the devices exhibited switching times of <10 s. Additionally, we demonstrate the utilization of printed organic photovoltaic devices (with or without the use of a lithium‐polymer battery) to power the devices between the colored and bleached state, illustrating a self‐powered ECD. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012 Organic and polymeric electrochromics are attractive for their ease of processing printable materials and low power consumption. The efficient and fast manufacture of large area flexible electrochromic devices on polyester substrates through roll coating is demonstrated using both spray and slot‐die coating methods. Product integration is demonstrated in a stand‐alone electrochromic device powered by roll‐to‐roll coated and printed polymer solar cell modules. Key to the structure is a printable electrolyte system that allows for good adhesion between the individual layers of the multilayer device.