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首页> 外文期刊>RSC Advances >Simultaneously enhanced Jsc and FF by employing two solution-processed interfacial layers for inverted planar perovskite solar cells
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Simultaneously enhanced Jsc and FF by employing two solution-processed interfacial layers for inverted planar perovskite solar cells

机译：通过将两个固溶处理的界面层用于倒置的平面钙钛矿太阳能电池，同时增强了 J sc 和FF

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摘要

Interface engineering has been proved to be a practical strategy to enhance power conversion efficiency (PCE) and stability of perovskite solar cells. Recently approaches involving ultra-thin layer deposition and vacuum-processing, while improving PCE, increase the processing complexity, and thus the overall cost. In this paper, we demonstrate a high-efficiency inverted planar perovskite solar cell, obtained with a simple wet-chemistry based, room-temperature, and cost-effective process, which synthesizes two interfacial layers: solution processed molybdenum oxide (named s-MoOx) for anode and titanium(IV) oxide bis(2,4-pentanedionate) (TOPD) for cathode buffer layers. Steady-state photoluminescence (PL), time resolved photoluminescence (TRPL) and electrochemical impedance spectroscopy (EIS) are conducted to characterize the charge transport properties, confirming an enhanced charge extraction efficiency and a suppressed charge recombination. In addition, the introduction of the interfacial layers facilities formation of an ohmic contact with the metal electrode, reducing the charge transfer resistance and increasing the FF to as high as 80.7%. The optimized solar cells achieve the best PCE of 16.04% which far exceeds the PCE of devices without these interfacial layers (PCE = 11.2%).
机译：事实证明，接口工程是提高钙钛矿型太阳能电池的功率转换效率（PCE）和稳定性的一种实用策略。最近涉及超薄层沉积和真空处理的方法在改善PCE的同时，增加了处理复杂性，从而增加了总成本。在本文中，我们演示了一种高效的倒置平面钙钛矿太阳能电池，该电池是通过基于湿化学的简单，室温且具有成本效益的工艺而获得的，该工艺合成了两个界面层：溶液处理的氧化钼（称为s-MoO x ）用于阳极，钛（ IV ）氧化物双（2,4-戊二酮酸酯）（TOPD）用于阳极阴极缓冲层。进行了稳态光致发光（PL），时间分辨光致发光（TRPL）和电化学阻抗谱（EIS）来表征电荷传输特性，从而确认了增强的电荷提取效率和抑制的电荷复合。另外，界面层的引入促进了与金属电极的欧姆接触的形成，降低了电荷转移电阻并使FF提高至高达80.7％。经过优化的太阳能电池可实现16.04％的最佳PCE，这远远超过了没有这些界面层的设备的PCE（PCE = 11.2％）。

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