Perovskite facet heterojunction solar cells

IF 38.6 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2024-12-03 DOI:10.1016/j.joule.2024.11.004

Feng Gao, Hang Li, Boxin Jiao, Liguo Tan, Chengtang Deng, Xianjin Wang, Chao Luo, Changling Zhan, Elke Debroye, Yingchen Peng, Ye Yang, Chenyi Yi, Qing Zhao

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Abstract

Polycrystalline perovskite films feature distinct facet orientations on the surface, which give rise to diverse chemical and electronic landscapes. These facet variations manifest in differences in optoelectronic characteristics, including energy level alignment and carrier mobility. Heterojunction structures, a staple in traditional photovoltaic devices, involve the strategic combination of two distinct components with unique optoelectronic properties. The heterogeneity of optoelectronic properties across the facets offers opportunities to create junctions that can enhance device performance. Here, we engineer a bilayer facet heterojunction (FHJ) in a perovskite-based photovoltaic device through integrating two films expressing distinct crystal facets (001)/(111). The buried interface of the FHJ devices demonstrates effective type II band alignment. The FHJ has propelled the power conversion efficiency (PCE) of evaporated perovskite solar cells (PSCs) to 24.92%. The operational stability of the target device has been significantly improved by retaining 91.7% of its initial performance after 2,000 h of operation at maximum power output.

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钙钛矿面异质结太阳能电池

多晶钙钛矿薄膜表面具有不同的表面取向，从而产生不同的化学和电子景观。这些方面的变化体现在光电特性的差异，包括能级对准和载流子迁移率。异质结结构是传统光伏器件的主要组成部分，它涉及到两个具有独特光电性能的不同组件的战略组合。光电特性在各个方面的异质性为创建可以增强器件性能的结提供了机会。在这里，我们在钙钛矿基光伏器件中设计了一个双层面异质结（FHJ），通过集成两个表达不同晶体面的薄膜(001)/(111)。FHJ器件的埋藏界面显示出有效的II型波段对准。FHJ将蒸发钙钛矿太阳能电池（PSCs）的功率转换效率（PCE）提高到24.92%。在最大输出功率下运行2000小时后，目标器件的运行稳定性得到了显著提高，其初始性能保持在91.7%。

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来源期刊

Joule Energy-General Energy

CiteScore

53.10

自引率

2.00%

发文量

198

期刊介绍： Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.