Enhancing the Hole-Conductivity of Spiro-OMeTAD without Oxygen or Lithium Salts by Using Spiro(TFSI)2 in Perovskite and Dye-Sensitized Solar Cells
Enhancing the Hole-Conductivity of Spiro-OMeTAD without Oxygen or Lithium Salts by Using Spiro(TFSI)2 in Perovskite and Dye-Sensitized Solar Cells
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DOI：
10.1021/ja504539w
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发表时间：
2014-08-06
影响因子：
15
通讯作者：
McGehee, Michael D.
中科院分区：
文献类型：
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作者：
Nguyen, William H.;Bailie, Colin D.;McGehee, Michael D.
2，2 '，7，7'-四（N，N-二-对甲氧基苯胺）-9，9 '-螺二芴（螺-OMe 2 O3）是固态染料敏化太阳能电池和钙钛矿吸收太阳能电池中常用的有机空穴传输材料，依赖于不受控制的氧化过程来达到可观的电导率。这项工作提出了使用名为spiro（TFSI）（2）的螺-OMeTAD的二价阳离子盐作为一种简单的方法，可以将螺-OMeTAD的电导率可控地提高至10（-3）S cm（-1），而不依赖于空气中的氧化。Spiro（TFSI）（2）首次展示了固态染料敏化太阳能电池的制造和操作，在沉积敏化剂后完全排除氧气，具有更高和更可重现的器件性能。用spiro（TFSI）（2）制造的钙钛矿吸收体太阳能电池在惰性气氛中显示出改善的操作稳定性。在惰性气氛中使用spiro（TFSI）（2）控制染料敏化和钙钛矿吸收太阳能电池中HTM的电导率是这些技术商业化的重要一步。
2,2',7,7'-Tetrakis(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD), the prevalent organic hole transport material used in solid-state dye-sensitized solar cells and perovskite-absorber solar cells, relies on an uncontrolled oxidative process to reach appreciable conductivity. This work presents the use of a dicationic salt of spiro-OMeTAD, named spiro(TFSI)(2), as a facile means of controllably increasing the conductivity of spiro-OMeTAD up to 10(-3) S cm(-1) without relying on oxidation in air. Spiro(TFSI)(2) enables the first demonstration of solid-state dye-sensitized solar cells fabricated and operated with the complete exclusion of oxygen after deposition of the sensitizer with higher and more reproducible device performance. Perovskite-absorber solar cells fabricated with spiro(TFSI)(2) show improved operating stability in an inert atmosphere. Gaining control of the conductivity of the HTM in both dye-sensitized and perovskite-absorber solar cells in an inert atmosphere using spiro(TFSI)(2) is an important step toward the commercialization of these technologies.