Abstract
AbstractPhenothiazine alternating copolymer poly{4,8‐bis(5‐dodecylthiophene‐2‐yl)benzo[1,2‐b:4,5‐b′]dithiophene‐alt‐(10‐decylphenothiazine)} (P1) is synthesized by Stille coupling polymerization. The synthesized polymer has an electrochemical bandgap of 1.61 eV and displays good photoluminescence with a quantum yield of 63.3%. The polymer is tested as a light‐emitting material in polymeric light‐emitting diodes (PLEDs) with a device structure of indium tin oxide (ITO)/poly(3,4‐ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS)/polymer/Cs2CO3/Al. The devices display an orange‐yellow electroluminescence (Commission Internationale de l'Eclairage (CIE) 1931 color‐space chromaticity diagram: x = 0.5355 and y = 0.4611) with a maximum brightness of 3130 cd m−2 at an applied voltage of 10 V.
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