ALD Grown Aluminum Oxide Submonolayers in Dye-Sensitized Solar Cells: The Effect on Interfacial Electron Transfer and Performance
ALD Grown Aluminum Oxide Submonolayers in Dye-Sensitized Solar Cells: The Effect on Interfacial Electron Transfer and Performance
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DOI：
10.1021/jp204886n
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发表时间：
2011-08
影响因子：
3.7
通讯作者：
Liisa J. Antila;Mikko J. Heikkilä;V. Mäkinen;Niko Humalamäki;M. Laitinen;V. Linko;P. Jalkanen;J. Toppari;Viivi Aumanen;M. Kemell;P. Myllyperkiö;K. Honkala;H. Häkkinen;M. Leskelä;J. Korppi-Tommola
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文献类型：
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作者：
Liisa J. Antila;Mikko J. Heikkilä;V. Mäkinen;Niko Humalamäki;M. Laitinen;V. Linko;P. Jalkanen;J. Toppari;Viivi Aumanen;M. Kemell;P. Myllyperkiö;K. Honkala;H. Häkkinen;M. Leskelä;J. Korppi-Tommola
研究了原子层沉积氧化铝势垒对染料敏化太阳能电池的电子注入、复合反应和效率的影响。用高分辨电子显微镜对在2μm厚的锐钛矿型纳米二氧化钛薄膜上制备的无定形AlOx亚单分子膜进行了表征。用飞行时间弹性反冲探测方法研究了平面锐钛矿薄膜上类似AlOx层的生长。密度泛函理论对锐钛矿型(101)表面第一次ALD循环的计算表明，由于吸附的前驱体分子之间的侧向排斥力和吸附位置的不均匀，沉积层的原子尺度粗糙。计算还表明，第一AlOx层上的空穴允许三碘化合物而不是联吡啶Ru敏化剂到达二氧化钛表面。在第一次沉积循环后，染料结合到AlOx上，与裸露的TiO2面相比，距离TiO2面平均约0.2 nm。增加..。
Effects of atomic layer deposited (ALD) aluminum oxide barriers on electron injection, recombination reactions, and efficiency of dye-sensitized solar cells were studied. The amorphous AlOx submonolayers prepared on nanocrystalline 2 μm thick TiO2 anatase film were characterized by high-resolution transmission electron microscopy. Time-of-flight elastic recoil detection method was employed to study the growth of similar AlOx layers on planar anatase films. Density functional theory calculations of the first ALD cycle over a (101) anatase surface revealed atomic scale roughness of the deposited layer owing to unequal adsorption sites and lateral repulsions between adsorbed precursor molecules. Calculations also indicate that the holes in the first AlOx layer allow triiodide but not the ruthenium bipyridyl sensitizer to reach the TiO2 surface. After the first deposition cycle the dye binds to AlOx and is in average about 0.2 nm farther from the TiO2 surface than when binding to the bare TiO2 surface. Increa...