27017-70-5Relevant articles and documents
A novel bis-lactam acceptor with outstanding molar extinction coefficient and structural planarity for donor-acceptor type conjugated polymer
Yoon, Won Sik,Kim, Dong Won,Park, Jun-Mo,Cho, Illhun,Kwon, Oh Kyu,Whang, Dong Ryeol,Kim, Jin Hong,Park, Jung-Hwa,Park, Soo Young
, p. 8489 - 8497 (2016/12/03)
A novel electron-accepting bis-lactam building block, 3,7-dithiophen-2-yl-1,5-dialkyl-1,5-naphthyridine-2,6-dione (NTDT), and a conjugated polymer P(NTDT-BDT) comprising NTDT as an electron acceptor and benzo[1,2-b:4,5-b′]dithiophene (BDT) as an electron donor are designed and synthesized for producing efficient organic solar cells. The thermal, electronic, photophysical, electrochemical, and structural characteristics of NTDT and P(NTDT-BDT) are studied in detail and compared with those of the widely used bis-lactam acceptor 3,6-dithiophen-2-yl-2,5-dialkylpyrrolo[3,4-c]pyrrole-1,4-dione (DPPT) and its polymer P(DPPT-BDT). Compared to DPPT derivatives, NTDT and P(NTDT-BDT) exhibit remarkably higher absorption coefficients, deeper highest occupied molecular orbital energy levels, and more planar conformations. A bulk heterojunction solar cells based on P(NTDT-BDT) exhibit power conversion efficiency of up to 8.16% with high short circuit current (Jsc) of 18.51 mA cm-2, one of the highest Jsc values yet obtained for BDT-based polymer. Thus, it is successfully demonstrated that the novel bis-lactam unit NTDT is a promising building block for use in organic photovoltaic devices.