Lee, Woo-Hyung Lee, Sang Kyu Son, Seon Kyoung Choi, Ji-Eun Shin, Won Suk Kim, Kyoungkon Lee, Soo-Hyoung Moon, Sang-Jin Kang, In-Nam 2024-01-20T15:31:35Z 2024-01-20T15:31:35Z 2022-01-25 2012-02 0887-624X https://pubs.kist.re.kr/handle/201004/129556 Three new polymers poly(3,4'''-didodecyl) hexaselenophene) (P6S), poly(5,5'-bis(4,4'-didodecyl-2,2'-biselenophene-5-yl)-2,2'-biselenophene) (HHP6S), and poly(5,5'-bis(3',4-didodecyl-2,2'-biselenophene-5-yl)-2,2'-biselenophene) (TTP6S) that have the same selenophene-based polymer backbone but different side chain patterns were designed and synthesized. The weight-averaged molecular weights (Mw) of P6S, HHP6S, and TTP6S were found to be 19,100, 24,100, and 19,700 with polydispersity indices of 2.77, 1.48, and 1.41, respectively. The UVvisible absorption maxima of P6S, HHP6S, and TTP6S are at 524, 489, and 513 nm, respectively, in solution and at 569, 517, and 606 nm, respectively, in the film state. The polymers P6S, HHP6S, and TTP6S exhibit low band gaps of 1.74, 1.95, and 1.58 eV, respectively. The field-effect mobilities of P6S, HHP6S, and TTP6S were measured to be 1.3 x 10-4, 3.9 x 10-6, and 3.2 x 10-4 cm2 V-1 s-1, respectively. A photovoltaic device with a TTP6S/[6,6]-phenyl C71-butyric acid methyl ester (1:3, w/w) blend film active layer was found to exhibit an open circuit voltage (VOC) of 0.71 V, a short circuit current (JSC) of 5.72 mA cm-2, a fill factor of 0.41, and a power conversion efficiency (PCE) of 1.67% under AM 1.5 G (100 mW cm-2) illumination. TTP6S has the most planar backbone of the tested polymers, which results in strong pp interchain interactions and strong aggregation, leading to broad absorption, high mobility, a low band gap, and the highest PCE. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 50: 551-561, 2012 English WILEY Synthesis and characterization of new selenophene-based conjugated polymers for organic photovoltaic cells Article 10.1002/pola.25064 1 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.50, no.3, pp.551 - 561 JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 50 3 551 561 N scie scopus 000298479800016 2-s2.0-84255198923 Polymer Science Polymer Science Article EFFECT TRANSISTOR CHARACTERISTICS SOLAR-CELLS MOBILITY PERFORMANCE COPOLYMERS DESIGN charge transfer conjugated polymers functionalization of polymers low band-gap polymer organic solar cell selenophene