Fullerene C70 as a p-type donor in organic photovoltaic cells
Fullerene C70 as a p-type donor in organic photovoltaic cells
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DOI：
10.1063/1.4894637
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发表时间：
2014-09
影响因子：
4
通讯作者：
Taojun Zhuang;Xiao‐Feng Wang;T. Sano;Z. Hong;Gang Li;Yang Yang-Yang;J. Kido
中科院分区：
文献类型：
--
作者：
Taojun Zhuang;Xiao‐Feng Wang;T. Sano;Z. Hong;Gang Li;Yang Yang-Yang;J. Kido
富勒烯及其衍生物作为n型材料被广泛应用于有机晶体管和光伏器件中。尽管人们认为它们在本质上应该是两极的，但很少有直接的实验证据证明这一点。在这项工作中，富勒烯C70被认为是一种有效的受体，在平面异质结(PHJ)有机光伏(OPV)电池中，富勒烯C70被用作p型电子供体，1，4，5，8，9，11-六氮杂三苯甲醛作为电子受体。在PHJ细胞中，C70层甚至厚达100 nm，填充因子(Ff)可以稳定地达到0.70以上，这表明与其他传统的给体材料相比，富勒烯C70作为p型给体具有更好的潜力。这些非常规PHJ电池的最佳效率为2.83%，短路电流为5.33 mA/cm2，开路电压为0.72V，FF为0.74。这项工作的结果揭示了富勒烯材料在OPV设备中作为供体的潜力，并对其进行了展望。
Fullerenes and their derivatives have been widely used as n-type materials in organic transistor and photovoltaic devices. Though it is believed that they shall be ambipolar in nature, there have been few direct experimental proofs for that. In this work, fullerene C70, known as an efficient acceptor, has been employed as a p-type electron donor in conjunction with 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile as an electron acceptor in planar-heterojunction (PHJ) organic photovoltaic (OPV) cells. High fill factors (FFs) of more than 0.70 were reliably achieved with the C70 layer even up to 100 nm thick in PHJ cells, suggesting the superior potential of fullerene C70 as the p-type donor in comparison to other conventional donor materials. The optimal efficiency of these unconventional PHJ cells was 2.83% with a short-circuit current of 5.33 mA/cm2, an open circuit voltage of 0.72 V, and a FF of 0.74. The results in this work unveil the potential of fullerene materials as donors in OPV devices, and pro...