Facet Orientation-Dependent Strain Relaxation Stabilizes FAPbI3 Perovskite Solar Cells

被引：4

作者：

Yang, Tinghuan ^{[1
,2
,3
]}

Yang, Yang ^{[1
,2
,3
]}

Niu, Tianqi ^{[1
,2
,3
]}

Zhao, Erxin ^{[1
,2
,3
]}

Wu, Nan ^{[1
,2
,3
]}

Wang, Shuang ^{[1
,2
,3
]}

Chen, Xin ^{[1
,2
,3
]}

Wang, Shumei ^{[1
,2
,3
]}

Wang, Yajie ^{[1
,2
,3
]}

Wu, Yin ^{[1
,2
,3
]}

Zhang, Zheng ^{[1
,2
,3
]}

Ma, Cheng ^{[1
,2
,3
]}

Gong, Yongshuai ^{[4
]}

Liu, Dongxue ^{[4
]}

Zhao, Kui ^{[1
,2
,3
]}

机构：

[1] Natl Minist Educ, Key Lab Appl Surface & Colloid Chem, Xian 710119, Peoples R China

[2] Shaanxi Key Lab Adv Energy Devices, Xian 710119, Peoples R China

[3] Shaanxi Normal Univ, Sch Mat Sci & Engn, Xian 710119, Peoples R China

[4] Three Gorges Corp, Sci & Technol Res Inst, Beijing 101199, Peoples R China

来源：

ACS ENERGY LETTERS | 2024年 / 10卷 / 01期

关键词：

PERFORMANCE; EFFICIENT;

D O I：

10.1021/acsenergylett.4c02674

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：427 / 438

页数：12

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