The photoelectric properties of multilayer organic photovoltaic cells (OPV cells) were studied. The active organic layers consisted of a planar heterojunction between a layer of Meso-Tetrakis(4-BromoPhenyl) Zinc(II) P...The photoelectric properties of multilayer organic photovoltaic cells (OPV cells) were studied. The active organic layers consisted of a planar heterojunction between a layer of Meso-Tetrakis(4-BromoPhenyl) Zinc(II) Porphyrin (BrPhPZn) as electron donor (ED) and a layer fullerene molecules. The devices were fabricated in a high vacuum by thermal sublimation, a technique that allows multilayer devices realization easily by successive depositions, and it does not require solvents, achieving purer films with reproducible characteristics. Taking into account that the anodic contact, a key factor for cell efficiency, is favored by the inclusion of a thin anodic buffer layer (ABL), the effect on the yield after including one or two (ABL): MoO3 or MoO3-CuI layers was studied. The cell which has the best photovoltaic characteristics has a BrPhPZn (ED) thickness of only 12.5 nm. This small thickness is related with the low conductivity of this organic molecule. On the other hand, including a thin MoO3-CuI bilayer increased, such device’s efficiency in a 200%, with regard to a cell without ABL, getting for one cell ITO/MoO3-CuI/BrPhPZn/C60/Alq3/Al, with a 1.03% yield.展开更多
设计合成了Por-N,Por-NBr,Por-Cu-N和Por-Cu-NBr四种水醇溶性小分子卟啉衍生物.对这类卟啉小分子衍生物的紫外可见吸收光谱研究表明,基于金属铜配位的卟啉小分子衍生物较未配位化合物有微弱的蓝移.循环伏安法对这类小分子卟啉衍生物的...设计合成了Por-N,Por-NBr,Por-Cu-N和Por-Cu-NBr四种水醇溶性小分子卟啉衍生物.对这类卟啉小分子衍生物的紫外可见吸收光谱研究表明,基于金属铜配位的卟啉小分子衍生物较未配位化合物有微弱的蓝移.循环伏安法对这类小分子卟啉衍生物的研究表明,基于金属铜配合物的卟啉衍生物的最高占有分子轨道能级均没有明显变化.采用空间电荷限制电流方法对小分子卟啉衍生物的研究表明,基于金属铜配位的卟啉小分子衍生物的电子迁移率得到明显提高.以聚合物PCE10为给体材料,富勒烯衍生物PC71BM为受体材料,以及合成的小分子卟啉衍生物为阴极界面层制备了结构为ITO/PEDOT:PSS/PCE10:PC71BM/卟啉小分子衍生物/Al的聚合物太阳电池器件.器件研究结果表明,化合物Por-NBr,Por-Cu-N与Por-Cu-NBr作为电子传输层的器件的光电转换效率达到9%以上,其中以Por-Cu-N作为阴极界面层的器件达到的最高效率为9.12%,相应器件的短路电流密度,开路电压以及填充因子分别为16.91 m A·cm-2,0.79 V和68.1%.表明这类水醇溶性小分子卟啉衍生物作为聚合物太阳电池的阴极界面层有着广阔的应用前景.展开更多
文摘The photoelectric properties of multilayer organic photovoltaic cells (OPV cells) were studied. The active organic layers consisted of a planar heterojunction between a layer of Meso-Tetrakis(4-BromoPhenyl) Zinc(II) Porphyrin (BrPhPZn) as electron donor (ED) and a layer fullerene molecules. The devices were fabricated in a high vacuum by thermal sublimation, a technique that allows multilayer devices realization easily by successive depositions, and it does not require solvents, achieving purer films with reproducible characteristics. Taking into account that the anodic contact, a key factor for cell efficiency, is favored by the inclusion of a thin anodic buffer layer (ABL), the effect on the yield after including one or two (ABL): MoO3 or MoO3-CuI layers was studied. The cell which has the best photovoltaic characteristics has a BrPhPZn (ED) thickness of only 12.5 nm. This small thickness is related with the low conductivity of this organic molecule. On the other hand, including a thin MoO3-CuI bilayer increased, such device’s efficiency in a 200%, with regard to a cell without ABL, getting for one cell ITO/MoO3-CuI/BrPhPZn/C60/Alq3/Al, with a 1.03% yield.
文摘设计合成了Por-N,Por-NBr,Por-Cu-N和Por-Cu-NBr四种水醇溶性小分子卟啉衍生物.对这类卟啉小分子衍生物的紫外可见吸收光谱研究表明,基于金属铜配位的卟啉小分子衍生物较未配位化合物有微弱的蓝移.循环伏安法对这类小分子卟啉衍生物的研究表明,基于金属铜配合物的卟啉衍生物的最高占有分子轨道能级均没有明显变化.采用空间电荷限制电流方法对小分子卟啉衍生物的研究表明,基于金属铜配位的卟啉小分子衍生物的电子迁移率得到明显提高.以聚合物PCE10为给体材料,富勒烯衍生物PC71BM为受体材料,以及合成的小分子卟啉衍生物为阴极界面层制备了结构为ITO/PEDOT:PSS/PCE10:PC71BM/卟啉小分子衍生物/Al的聚合物太阳电池器件.器件研究结果表明,化合物Por-NBr,Por-Cu-N与Por-Cu-NBr作为电子传输层的器件的光电转换效率达到9%以上,其中以Por-Cu-N作为阴极界面层的器件达到的最高效率为9.12%,相应器件的短路电流密度,开路电压以及填充因子分别为16.91 m A·cm-2,0.79 V和68.1%.表明这类水醇溶性小分子卟啉衍生物作为聚合物太阳电池的阴极界面层有着广阔的应用前景.
