Department of Materials Science and Engineering, National Chiao Tung University , Hsinchu 30010, Taiwan, R.O.C.
National Synchrotron Radiation Research Center , Hsinchu 30076, Taiwan, R.O.C.
ACS Appl Mater Interfaces. 2017 Jan 25;9(3):2232-2239. doi: 10.1021/acsami.6b10508. Epub 2017 Jan 11.
A nanocomposite layer comprising the conjugated polymer poly[(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctyl)fluorene] (PFN) and nickel oxide (NiO) has been employed as the hole transport layer (HTL) in organic photovoltaics (OPVs) featuring PBDTTBO-C and [6,6]-phenyl-C-butyric acid methyl ester (PCBM) as the active layer. The optimal device incorporating the PFN:NiO nanocomposite as the HTLs displayed a power conversion efficiency (PCE) to 6.2%, up from 4.5% for the corresponding device incorporating pristine NiO as the HTL layer: a nearly 40% improvement in PCE. X-ray photoelectron spectroscopy (XPS) was used to determine the types of chemical bonding, ultraviolet photoelectron spectroscopy (UPS) to measure the change in work function, and atomic force microscopy (AFM) to examine the morphology of the composite layers. The growth of nickel trioxide, NiO, in the PFN:NiO layer played a key role in producing the p-doping effect and in tuning the work function, thereby improving the overall device performance.
已将包含共轭聚合物聚(9,9-双(3'-(N,N-二甲基氨基)丙基)-2,7-芴)-交替-2,7-(9,9-二辛基)芴和氧化镍(NiO)的纳米复合层用作具有 PBDTTBO-C 和[6,6]-苯基-C-丁酸甲酯(PCBM)作为活性层的有机光伏器件(OPVs)的空穴传输层(HTL)。在最佳器件中，将 PFN:NiO 纳米复合材料作为 HTL 时，其功率转换效率(PCE)为 6.2%，而将原始 NiO 作为 HTL 层时，其 PCE 为 4.5%，提高了近 40%。X 射线光电子能谱(XPS)用于确定化学键的类型，紫外光电子能谱(UPS)用于测量功函数的变化，原子力显微镜(AFM)用于检查复合层的形态。PFN:NiO 层中三氧化镍(NiO)的生长在产生 p 型掺杂效应和调整功函数方面发挥了关键作用，从而提高了整体器件性能。
