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首页> 外文期刊>ACS applied materials & interfaces >Microscopic Dynamics Research on the 'Mature' Process of Dye-Sensitized Solar Cells after Injection of Highly Concentrated Electrolyte
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Microscopic Dynamics Research on the 'Mature' Process of Dye-Sensitized Solar Cells after Injection of Highly Concentrated Electrolyte

机译：注入高浓度电解质后染料敏化太阳能电池“成熟”过程的微观动力学研究

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After injection of electrolyte, the internal three-dimensional solidliquid penetration system of dye-sensitized solar cells (DSCs) can take a period of time to reach mature state. This paper studies the changes of microscopic processes of DSCs including TiO2 energy-level movement, localized state distribution, charge accumulation, electron transport, and recombination dynamics, from the beginning of electrolyte injection to the time of reached mature state. The results show that the microscopic dynamics process of DSCs exhibited a time-dependent behavior and achieved maturity similar to 12 h after injecting the electrolyte into DSCs. Within 012 h, several results were observed: (1) the conduction band edge of TiO2 moved slightly toward negative potential direction; (2) the localized states in the band gap of TiO2 was reduced according to the same distribution law; (3) the transport resistance in TiO2 film increased, and electron transport time was prolonged as the time of maturity went on, which indicated that the electron transport process is impeded gradually; (4) the recombination resistance at the TiO2/electrolyte (EL) interface increases, and electron lifetime gradually extends, therefore, the recombination process is continuously suppressed. Furthermore, results suggest that the parameters of EL/Pt-transparent conductive oxide (TCO) interface including the interfacial capacitance, electron-transfer resistance, and transfer time constant would change with time of maturity, indicating that the EL/Pt-TCO interface is a potential factor affecting the mature process of DSCs.
机译：注入电解质后，染料敏化太阳能电池（DSC）的内部三维固液渗透系统可能需要一段时间才能达到成熟状态。从电解质注入开始到达到成熟状态，本文研究了DSC微观过程的变化，包括TiO2能级运动，局部态分布，电荷积累，电子传输和复合动力学。结果表明，DSCs的微观动力学过程表现出随时间变化的行为，并且在将电解质注入DSCs中达到类似于12 h的成熟度。在012 h内，观察到以下结果：（1）TiO2的导带边缘向负电位方向轻微移动; （2）按照相同的分布规律降低了TiO2带隙中的局部态; （3）随着成熟时间的延长，TiO2薄膜的传输阻力增加，电子传输时间延长，表明电子传输过程逐渐受到阻碍。 （4）TiO 2 /电解质（EL）界面处的复合电阻增加，并且电子寿命逐渐延长，因此，连续抑制了复合过程。此外，结果表明，EL / Pt-透明导电氧化物（TCO）界面的参数（包括界面电容，电子转移电阻和转移时间常数）将随着成熟时间而变化，表明EL / Pt-TCO界面为影响DSC成熟过程的潜在因素。

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