화학공학소재연구정보센터
Solar Energy Materials and Solar Cells, Vol.141, 93-100, 2015
Application of a water-soluble metallophthalocyanine derivative as a cathode interlayer for the polymer solar cells
A water-soluble metallophthalocyanine (MPc) derivative, 2,3,9,10,16,17,23,24-octakis(2-trimethylaminoethylsulfanyl) zincylphthalocyanine octaiodine (ZnPc[S(CH2)(2)N-(CH3)(3)I](8)) was synthesized and applied in polymer solar cells (PSCs). A power conversion efficiency (PCE) of 7.06% has been obtained when the ZnPc[S(CH2)(2)N(CH3)(3)I](8) was utilized as a cathode interlayer in the PSCs based on a blend of PCDTBT (poly[N-9 ''-hepta-decanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)]) and PCTIBM ([6,6]-phenyl C-71 butyric acid methyl ester) as an active layer. Ultraviolet photoemission spectroscopic (UPS), atomic force microscopy (AFM), contact angle (theta) and mobility measurements demonstrated that an introduction of ZnPc[S(CH2)(2)N(CH3)(3)I](8) between active layer and cathode decreased work function of cathode, increased hole mobility and facilitated a balance of electron and hole transport in the PSCs, resulting in a simultaneous improvement of open-circuit voltage, short-circuit current and fill factor. (C) 2015 Elsevier B.V. All rights reserved.