Fill factor of planar heterojunction organic solar cells with varied donor materials
Fill factor of planar heterojunction organic solar cells with varied donor materials
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不同施主材料的平面异质结有机太阳能电池的填充因子
DOI：
10.1088/0022-3727/45/17/175101
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发表时间：
2012-05
期刊：
影响因子：
--
通讯作者：
Ganqin Huang
中科院分区：
文献类型：
--
作者：
Junsheng Yu;Jiang Huang;Rong Jiang;Ganqin Huang
研究了平面异质结有机太阳能电池填充因子与材料性质的关系。OSC是使用一系列小分子电子供体材料制备的，这些材料具有不同的最高占据分子轨道（HOMO）能级，范围为5.1至5.7 eV，空穴迁移率（μh）范围为3.00 × 10−5至2.43 × 10−3 cm V−1 s−1。结果表明，具有高迁移率的施主材料可以显着提高FF，这部分是由于根据暗电流密度-电压（J-V）特性的低串联电阻。1.1-1.2 eV的最佳ΔE（供体的HOMO和受体的最低未占分子轨道（LUMO）之间的能量差）也可以增加FF。同时，基于Poole-Frenkel模型和电荷俘获效应，对OSCs的光电流密度（Jph）进行了数值模拟，直观地揭示了μh和ΔE对FF的影响。
The dependence of fill factor (FF) on material properties in planar heterojunction (PHJ) organic solar cells (OSCs) was investigated. The OSCs were prepared using a series of small molecular electron donating materials with different highest occupied molecular orbital (HOMO) levels ranging from 5.1 to 5.7 eV and hole mobility (μh) varying from 3.00 × 10−5 to 2.43 × 10−3 cm V−1 s−1. The results showed that donor materials with high mobility can significantly enhance the FF, which was partly due to the low series resistance according to the dark current density–voltage (J–V) characteristics. An optimal ΔE of 1.1–1.2 eV, which is the energy difference between the HOMO of the donor and the lowest unoccupied molecular orbital (LUMO) of the acceptor, can also increase the FF. Meanwhile, the photocurrent densities (Jph) of the OSCs were simulated based on the Poole–Frenkel model and charge trapping effect to intuitively reveal the effect of μh and ΔE on FF.
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