Hybrid Carbon Nanotube Networks as Efficient Hole Extraction Layers for Organic Photovoltaics
Hybrid Carbon Nanotube Networks as Efficient Hole Extraction Layers for Organic Photovoltaics
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DOI：
10.1021/nn304705t
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发表时间：
2013-01-01
期刊：
影响因子：
17.1
通讯作者：
Silva, S. Ravi P.
中科院分区：
文献类型：
--
作者：
Dabera, G. Dinesha M. R.;Jayawardena, K. D. G. Imalka;Silva, S. Ravi P.
制备了透明的、高度渗透的区域规则聚（3-己基噻吩）（r - p3ht）包裹的半导体单壁碳纳米管（s-SWNTs）网络，并利用光谱和电学测量研究了这些纳米杂化物的电荷转移过程。这些数据揭示了聚合物对s-SWNTs的空穴掺杂，挑战了流行的电子掺杂假设。通过控制制造，实现了高到低密度的纳米混合网络，并将低密度混合碳纳米管网络作为块状异质结（BHJ）有机光伏（OPV）的空穴传输层（HTLs）进行了测试。结合这些rp - p3ht /s-SWNT网络作为HTL的opv展示了迄今为止最佳的大面积（70 mm(2)）碳纳米管结合有机太阳能电池，功率转换效率为7.6%。这表明了纳米杂化材料作为一种高效的空穴提取层的强大能力，我们相信，密集的纳米杂化网络有潜力取代昂贵和材料稀缺的无机透明电极，在大面积电子领域实现低成本的柔性电子。
Transparent, highly percolated networks of regio-regular poly(3-hexylthiophene) (rr-P3HT)-wrapped semiconducting single-walled carbon nanotubes (s-SWNTs) are deposited, and the charge transfer processes of these nanohybrids are studied using spectroscopic and electrical measurements. The data disclose hole doping of s-SWNTs by the polymer, challenging the prevalent electron-doping hypothesis. Through controlled fabrication, high- to low-density nanohybrid networks are achieved, with low-density hybrid carbon nanotube networks tested as hole transport layers (HTLs) for bulk heterojunction (BHJ) organic photovoltaics (OPV). OPVs incorporating these rr-P3HT/s-SWNT networks as the HTL demonstrate the best large area (70 mm(2)) carbon nanotube incorporated organic solar cells to date with a power conversion efficiency of 7.6%. This signifies the strong capability of nanohybrids as an efficient hole extraction layer, and we believe that dense nanohybrid networks have the potential to replace expensive and material scarce inorganic transparent electrodes in large area electronics toward the realization of low-cost flexible electronics.