878554-50-8Relevant academic research and scientific papers
Triphenylamine-containing D-A-D molecules with (dicyanomethylene)pyran as an acceptor unit for bulk-heterojunction organic solar cells
Zhang, Jing,Wu, Guanglong,He, Chang,Deng, Dan,Li, Yongfang
, p. 3768 - 3774 (2011)
Two new triphenylamine (TPA)-containing D-A-D molecules with TPA as the donor unit (D), (dicyanomethylene)pyran (PM) as the acceptor unit (A) and thienylenevinylene (TV) or 4-hexyl-thienylenevinylene (HTV) as the conjugated pi-bridge, TPA-TV-PM and TPA-HTV-PM, have been designed and synthesized for solution-processable organic solar cells (OSCs). The optical and electrochemical properties of these linear molecules were studied. The compounds exhibit broad absorption in the visible region with lower HOMO energy levels, which are desirable for application as a donor in organic solar cells. The OSC devices were fabricated by spin-coating the blend solution of the molecules as the donor and PC70BM as the acceptor (1:3, w/w). The power conversion efficiency of the OSCs based on TPA-TV-PM and TPA-HTV-PM reached 2.06% and 2.10%, respectively, under the illumination of AM.1.5, 100 mW cm-2. The Royal Society of Chemistry 2011.
Design, synthesis, photophysical, and electrochemical properties of DCM-based conjugated polymers for light-emitting devices
Vanjinathan, Mahalingam,Lin, Hong-Cheu,Nasar, A. Sultan
, p. 3806 - 3818 (2012)
A series of conjugated hyperbranched polymers, hyperbranched copolymers, and linear polymers containing 2-pyran-4-ylidenemalononitrile (acceptor) and triphenylamine/fluorene (donor) units were synthesized and characterized by FTIR, 1H NMR, thermogravimetric analyses, differential scanning calorimetry, gel permeation chromatography, UV-visible, photoluminescence, and cyclic voltammetry measurements. All the polymers show red-light emission in the range of 566-656 nm both in solution and in solid state. The quantum efficiency of the polymers was in the range of 56-82%. Among the six polymers synthesized, only polymers containing fluorene units show Tg and polymers based on triphenylamine not exhibit Tg. The band gap of these polymers were found to be reasonably low; hyperbranched copolymer containing fluorene unit shows lowest band gap of 2.18 eV due to the stabilization of LUMO energy level by the electron withdrawing -CN groups. The thermal and solubility behavior of the polymers were found to be good. All the EL spectra of the devices (indium-tin oxide/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/ polymer/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline/tris(8-hydroxyquinoline) aluminum)/LiF/Al) show red-light emission, and the device fabricated with P3 and P4 shows maximum luminance and luminous efficiency of 4104 cd m-2 and 0.55 cd A-1 and 3696 cd m-2 and 0.47 cd A-1, respectively, indicates that they had the best carrier balance.
