The exclusive orientation of a singular perovskite facet during crystallization can lead to significant strain accumulation in solution-processed films, compromising the performance of perovskite solar cells (PSCs). To address this issue, we propose a facet-complementarity strategy through crystallization modulation utilizing a formamidine-based additive 1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboximidamide hydrochloride (FPPC) to control strain accumulation. The FPPC ligand shows strong adsorption on the (111) facet of perovskite via chemical interactions with octahedra lattice, promoting the formation of a more stable (111) facet against the preferred (100) orientation and achieving facet complementarity in the FAPbI3 film. Additionally, the increased dissociation barrier of the ligand-PbI2 bonding extends the crystallization growth window, allowing for a better lattice rearrangement and a balanced crystallization rate from bulk to surface. As a result, the facet-complementary devices achieve champion efficiencies of 25.63 and 24.26% on 0.09 and 1.0 cm2 scales, respectively, with greatly enhanced device longevity.

Tinghuan Yang

Yang Yang

Tianqi Niu

Erxin Zhao

Nan Wu

Shuang Wang

Xin Chen

Shumei Wang

Yajie Wang

Yin Wu

Zheng Zhang

Cheng Ma

Yongshuai Gong

Dongxue Liu

Kui Zhao

ACS Energy Letters

ACS ENERGY LETTERS 发表的论文报告了能源研究各个方面的新科学进展。下面列出了与能量捕获、转换和存储相关的主题。能源材料、光捕获组件能量转换过程（催化和光催化）太阳能燃料（制氢、减少二氧化碳）无机、有机和混合光伏光合作用和生物燃料燃料电池、蓄电池和超级电容器等离子、OLED 和光显示系统串联器件、压电和热电过程

ACS Energy Letters publishes papers reporting new scientific advancements in various aspects of energy research. The topics covered include energy capture, conversion, and storage, such as energy materials, light-harvesting components, energy conversion processes (catalysis and photocatalysis), solar fuels (hydrogen production, carbon dioxide reduction), inorganic, organic, and hybrid photovoltaics, photosynthesis and biofuels, fuel cells, batteries, and supercapacitors, plasma, OLEDs and optical display systems, tandem devices, piezoelectric and thermoelectric processes.

《ACS Energy Letters》发表关于能源研究各个方面的新科学进展的论文。主要涵盖以下主题：能量捕获、转换和存储，包括能源材料、光捕获组件、能量转换过程（催化和光催化）、太阳能燃料（制氢、减少二氧化碳）、无机、有机和混合光伏、光合作用和生物燃料、燃料电池、蓄电池和超级电容器、等离子体、OLED和光显示系统、串联器件、压电和热电过程等。

Facet Orientation-Dependent Strain Relaxation Stabilizes FAPbI<sub>3</sub> Perovskite Solar Cells

晶面取向依赖的应变弛豫稳定了FAPbI<sub>3</sub>钙钛矿太阳能电池

Category	Quartile
材料科学	1
材料科学, 物理化学	1
材料科学, 电化学	1
材料科学, 能源与燃料	1
材料科学, 材料科学综合	1
材料科学, 纳米科技	1

Facet Orientation-Dependent Strain Relaxation Stabilizes FAPbI₃ Perovskite Solar Cells

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Journal Info

Category	Quartile
NANOSCIENCE & NANOTECHNOLOGY	1

Facet Orientation-Dependent Strain Relaxation Stabilizes FAPbI3 Perovskite Solar Cells

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Journal Info

Facet Orientation-Dependent Strain Relaxation Stabilizes FAPbI₃ Perovskite Solar Cells