染料敏化半导体纳米晶薄膜中的电子注入动力学

IF 8.2 1区 化学 Q1 CHEMISTRY, PHYSICAL
Akihiro Furube , Ryuzi Katoh , Kohjiro Hara
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引用次数: 35

摘要

本文从表面科学的角度综述了近年来在染料敏化太阳能电池中与电子注入机制密切相关的半导体金属氧化物纳米粒子,特别是TiO2纳米晶膜染料敏化相关现象的超快光谱研究,这些研究引起了纯科学和应用科学两方面的关注。这种太阳能电池涉及许多化学和物理过程,如分子和纳米结构的光收集、界面电子转移、固体和电解质中的电荷迁移、材料的降解等。其中,最初级的过程是由感光染料分子的光吸收引起的;也就是说,从激发态吸附剂向半导体金属氧化物的导带注入电子是非常重要的,因为这一过程必须是100%高效的,并以最小的驱动力产生高电流和高电压。我们首先关注了在这个研究领域中使用的实验方法的细节,然后在接下来的章节中,通过集中讨论影响染料敏化半导体中电子注入动力学的每个参数来组织这篇综述。最后,我们强调了测量实际DSSCs对于精确比较电子注入动力学和器件性能的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electron injection dynamics in dye-sensitized semiconductor nanocrystalline films

We have summarized recent ultrafast spectroscopic studies on phenomena associated with dye-sensitization of semiconductor metal oxide nanoparticles, especially TiO2 nanocrystalline film from a surface science perspective with a strong relation to mechanism of electron injection in dye-sensitized solar cells, which are attracting much interest from both viewpoints of pure science and applied science.

A lot of chemical and physical processes are involved in this solar cell, such as light harvesting by molecules and nanostructures, interfacial electron transfer, charge migration in solid and electrolyte, degradation of the materials, and so on. Among them, the very primary process initiated by photoabsorption by sensitizing dye molecules; that is, electron injection from excited adsorbates into the conduction band of semiconductor metal oxides is significantly important, because this process must be 100% efficient with a minimum driving force for high current and voltage generation.

We have first focused on details of experimental methods used in this research area, and then in the following Sections, have organized this review by concentrating on each parameter that influences dynamics of electron injection in dye-sensitized semiconductors. Finally we have emphasized it is important to measure actual DSSCs for the precise comparison between electron injection dynamics and device performance.

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来源期刊
Surface Science Reports
Surface Science Reports 化学-物理:凝聚态物理
CiteScore
15.90
自引率
2.00%
发文量
9
审稿时长
178 days
期刊介绍: Surface Science Reports is a journal that specializes in invited review papers on experimental and theoretical studies in the physics, chemistry, and pioneering applications of surfaces, interfaces, and nanostructures. The topics covered in the journal aim to contribute to a better understanding of the fundamental phenomena that occur on surfaces and interfaces, as well as the application of this knowledge to the development of materials, processes, and devices. In this journal, the term "surfaces" encompasses all interfaces between solids, liquids, polymers, biomaterials, nanostructures, soft matter, gases, and vacuum. Additionally, the journal includes reviews of experimental techniques and methods used to characterize surfaces and surface processes, such as those based on the interactions of photons, electrons, and ions with surfaces.
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