Advancing Halide Perovskite Solar Cell by Functional Interlayers

通过功能中间层推进卤化物钙钛矿太阳能电池

• 批准号: 530384961
• 负责人: Professor Dr.-Ing. Marcus Bär
• 金额: --
• 依托单位: Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/530384961?language=en
• 关键词: Advancing; Halide; Perovskite; Solar; Cell

Halide perovskite based solar cells (PSCs) mark a critical turning point for emerging photovoltaic technologies. The French-German project ALSATIAN aims at enhancing the reliability of PSCs by developing new functional thin-film coatings that will improve stability of high efficiency cells. Rapid efficiency-focused progress in PSCs risks pursuing only a particular device heterostructure which may in fact be nonideal in terms of reliability. ALSATIAN will look beyond standard interlayer materials to focus on novel thin-film materials and deposition procedures to process interlayers by atomic layer deposition (ALD) and molecular layer deposition (MLD) adjacent to the perovskite absorber in the cell to serve as transport, recombination, or passivation layer. Using in situ and operando techniques, we plan to assess the impact of the interface between functional interlayer and perovskite on the device performance and stability. A major objective is to evaluate the compatibility of the interlayer deposition process and the interlayer itself with the perovskite film, since chemical reactions can initiate rapid degradation or create defect sites that impede device functionality. However, for a stabilized interface system the functional layer can provide protection of the perovskite film and improve optoelectronic properties. Hence, we will employ advanced spectroscopic tools paired with DFT calculations to investigate chemical reaction pathways that occur during layer growth at the interfaces. In addition, we will study (photo-)electrochemical reactions between the layers that could be induced under operating conditions in various chemical environments. To this end, we will assess buried interfaces by hard X-ray photoemission and determine key electronic properties, which we will correlate to data from spatially resolved optical spectroscopy. In combination, we will investigate the impact of the interface between the functional thin-film coating and perovskite layer on the device performance and stability in-situ, i.e., in between growth steps, or operando, i.e., for operating solar cells in adapted device architectures.

卤化物钙钛矿太阳能电池（PSC）标志着新兴光伏技术的关键转折点。法德合作项目ALSATIAN旨在通过开发新的功能薄膜涂层来提高PSC的可靠性，从而提高高效电池的稳定性。PSC中快速的以效率为中心的进展有仅追求特定器件异质结构的风险，这实际上在可靠性方面可能是不理想的。ALSATIAN将超越标准夹层材料，专注于新型薄膜材料和沉积程序，通过原子层沉积（ALD）和分子层沉积（MLD）处理夹层，邻近电池中的钙钛矿吸收剂，作为传输，复合或钝化层。使用原位和操作技术，我们计划评估功能夹层和钙钛矿之间的界面对器件性能和稳定性的影响。一个主要目的是评估夹层沉积过程和夹层本身与钙钛矿膜的相容性，因为化学反应可以引发快速降解或产生阻碍器件功能的缺陷部位。然而，对于稳定的界面系统，功能层可以提供钙钛矿膜的保护并改善光电性能。因此，我们将采用先进的光谱工具与DFT计算配对，以研究在界面层生长过程中发生的化学反应途径。此外，我们将研究在各种化学环境中的操作条件下可能引起的层之间的（光）电化学反应。为此，我们将通过硬X射线光电发射评估掩埋界面，并确定关键的电子特性，我们将与空间分辨光谱学的数据相关联。结合起来，我们将研究功能薄膜涂层和钙钛矿层之间的界面对器件性能和原位稳定性的影响，即，在生长步骤之间，或操作，即，用于在适应的器件结构中操作太阳能电池。