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首页> 外文期刊>Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion >Effect of functional groups of acceptor material on photovoltaic response of bulk hetero-junction organic devices based on tin phthalocyanine (SnPc)
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Effect of functional groups of acceptor material on photovoltaic response of bulk hetero-junction organic devices based on tin phthalocyanine (SnPc)

机译：受体材料官能团对基于酞菁锡（SnPc）的本体异质结有机器件光伏响应的影响

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We have fabricated and characterized the bulk hetero-junction photovoltaic devices based on the donor and acceptor blends. For the present investigation, we have used SnPc as donor material, whereas a series of acceptor materials with identical backbone but different acceptor strength were used to make the blend. The role of functional groups, attached to backbone of acceptor material on the optical, electrical and photovoltaic properties of the devices was investigated. The origin of open-circuit voltage (V-oc) and short-circuit photocurrent (J(sc)) has been discussed considering the ionization potential of donor and electron affinity of the acceptor material. The photocurrent of the device depends on choice of acceptor materials, i.e. number of acceptor group attached to the acceptor molecules, showing the importance of energy mismatch between lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) levels of donor and acceptor molecules. Here, we also investigated the effect of thermal annealing on the optical, electrical and photovoltaic properties of the bulk hetero-junction device employing tin phthalocyanine (SnPc) and Rose Bengal (RB) used as donor and acceptor, respectively. From the impedance spectroscopy, we conclude that the change in bulk resistance and dielectric constant of the active material due to the illumination has a direct relevance to the photocurrent generated by the device. (C) 2007 Elsevier B.V. All rights reserved.
机译：我们已经基于供体和受体混合物制造并表征了本体异质结光伏器件。在本研究中，我们使用SnPc作为供体材料，而一系列具有相同骨架但受体强度不同的受体材料被用于制备共混物。研究了附着在受体材料主链上的官能团在器件的光学，电学和光伏性质上的作用。考虑到施主的电离电势和受体材料的电子亲和力，已经讨论了开路电压（V-oc）和短路光电流（J（sc））的起源。装置的光电流取决于受体材料的选择，即与受体分子连接的受体基团的数量，表明供体和受体的最低未占据分子轨道（LUMO）和最高占据分子轨道（HOMO）水平之间的能量失配的重要性分子。在这里，我们还研究了热退火对分别使用锡酞菁（SnPc）和玫瑰红（RB）作为施主和受主的本体异质结器件的光学，电学和光伏性能的影响。从阻抗光谱学中，我们得出结论，由于照明而引起的活性材料的体积电阻和介电常数的变化与器件产生的光电流有直接关系。 （C）2007 Elsevier B.V.保留所有权利。

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