Facile infiltration of semiconducting polymer into mesoporous electrodes for hybrid solar cells
Facile infiltration of semiconducting polymer into mesoporous electrodes for hybrid solar cells
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DOI：
10.1039/c1ee01135a
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发表时间：
2011-08-01
影响因子：
32.5
通讯作者：
Snaith, Henry J.
中科院分区：
文献类型：
--
作者：
Abrusci, Agnese;Ding, I-Kang;Snaith, Henry J.
半导体聚合物和金属氧化物的混杂复合材料是太阳能电池很有前途的组合。然而，在整个光活性薄膜中形成具有双连续互穿网络的可控纳米结构是困难的。预制的“介孔”金属氧化物电极可以作为后续聚合物渗透的明确模板。然而，高聚物链向扭曲的多孔通道的远距离渗透似乎躲避了科学界，限制了这项技术的进步。在这里，我们提出了聚(3-己基噻吩基)(P3HT)渗透到介孔染料敏化的二氧化钛的结构和电子表征。通过多种技术的结合，我们实现了P3HT的均匀孔隙填充，最深可达4微米以上，但聚合物填充的孔隙体积分数不到24%。尽管孔洞填充率很低，但仍展示了异常高效的电荷收集，这表明孔洞填充不是介孔混合太阳能电池的关键问题。
Hybrid composites of semiconducting polymers and metal oxides are promising combinations for solar cells. However, forming a well-controlled nanostructure with bicontinuous interpenetrating networks throughout the photoactive film is difficult to achieve. Pre-structured "mesoporous" metal oxide electrodes can act as a well-defined template for latter polymer infiltration. However, the long range infiltration of polymer chains into contorted porous channels has appeared to elude the scientific community, limiting the advancement of this technology. Here we present a structural and electronic characterisation of poly(3-hexylthiophene) (P3HT) infiltrated into mesoporous dye-sensitized TiO2. Through a combination of techniques we achieve uniform pore filling of P3HT up to depths of over 4 mu m, but the volumetric fraction of the pores filled with polymer is less than 24%. Despite this low pore-filling, exceptionally efficient charge collection is demonstrated, illustrating that pore filling is not the critical issue for mesoporous hybrid solar cells.