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首页> 外文期刊>Optical Materials >Introduction of P3HT-based gradient heterojunction layer to improve optoelectronic performance of low-cost carbon-based perovskite solar cell
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Introduction of P3HT-based gradient heterojunction layer to improve optoelectronic performance of low-cost carbon-based perovskite solar cell

机译：基于P3HT的梯度异质结层的引入提高低成本碳钙钛矿太阳能电池光电性能

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摘要

Perovskite solar cells (PSC) have achieved great success in the last decade in photovoltaic applications. The power conversion efficiency (PCE) has rapidly improved from 3.8% in 2009 to 25.6% in 2021. Despite this growth spurt in efficiency, PSCs are still plagued with problems related to long term operational stability which limits its commercial scalability. One of the main problems associated with PSC is the formation of charge defects and interfacial traps arising due to uncoordinated lead ions in the perovskite interface. The stability of perovskite layer is crucial for better charge extraction of PSC. In the present study, we have devised a method to passivate the perovskite layer with a P3HT based gradient heterojunction layer (GHL) introduced between perovskite and hole transport layer under ambient conditions. This type of GHL when introduced into perovskite interface would passivate the uncoordinated Pb2+ ions, reduce the non-radioactive recombination losses and improve the hydrophobicity of perovskite solar cell for better resistance against heat and moisture stressors. The PSCs with P3HT-based GHL based had a higher PCE as compared to pristine PSC, longer recombination lifetime and lesser pinholes and charge defects. Additionally, PSCs with P3HT-based GHL performed well under accelerated ageing conditions of high humidity and sudden rise and fall in temperature.
机译：Perovskite太阳能电池（PSC）在光伏应用中的最后十年中取得了巨大的成功。电力转换效率（PCE）在2009年的3.8％迅速提高至2021年的25.6％。尽管这种增长效率突出，但PSC仍然困扰着与长期运营稳定性相关的问题，这限制了其商业可扩展性。与PSC相关的主要问题是由于钙钛矿界面中未配备的铅离子而产生的电荷缺陷和界面陷阱的形成。钙钛矿层的稳定性对于更好的充电提取至关重要。在本研究中，我们设计了一种方法，该方法将钙钛矿层与在环境条件下珀洛特和空穴传输层之间引入的P3HT基梯度异质结层（GH1）钝化。这种类型的GHL当引入PEROVSKITE界面时将钝化未配录的PB2 +离子，降低非放射性重组损失，并改善钙钛矿太阳能电池的疏水性，以更好地抵抗热和水分压力源。与原始PSC相比，基于P3HT的GH1基于PSC的PSC具有更高的PCE，更长的重组寿命和小针孔和电荷缺陷。另外，PSC与基于P3HT的GH1的PSC在高湿度的加速老化条件下进行良好，突然上升和落入温度。

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