Single Crystal Seed Induced Epitaxial Growth Stabilizes α-FAPbI3 in Perovskite Solar Cells

被引：10

作者：

Cheng, Qian ^{[1
,2
]}

You, Shuai ^{[3
]}

Zhang, Weichuan ^{[2
]}

Xie, Meiling ^{[2
]}

Yue, Tong ^{[1
]}

Tian, Chenyang ^{[2
]}

Zhang, Hong ^{[2
]}

Wei, Zhixiang ^{[2
]}

Li, Xiong ^{[3
]}

Zhang, Yuan ^{[1
]}

Zhou, Huiqiong ^{[2
]}

机构：

[1] Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Chem, Beijing 100191, Peoples R China

[2] Natl Ctr Nanosci & Technol, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

[3] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

来源：

NANO LETTERS | 2024年 / 24卷 / 17期

基金：

中国国家自然科学基金;

关键词：

alpha-FAPbI(3); crystallization; phase formation; perovskite solar cells; stability; IODIDE;

D O I：

10.1021/acs.nanolett.4c00993

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

FAPbI(3) stands out as an ideal candidate for the photoabsorbing layer of perovskite solar cells (PSCs), showcasing outstanding photovoltaic properties. Nonetheless, stabilizing photoactive alpha-FAPbI(3) remains a challenge due to the lower formation energy of the competitive photoinactive delta-phase. In this study, we employ tetraethylphosphonium lead tribromide (TEPPbBr3) single crystals as templates for the epitaxial growth of PbI2. The strategic use of TEPPbBr3 optimizes the evolution of intermediates and the crystallization kinetics of perovskites, leading to high-quality and phase-stable alpha-FAPbI(3) films. The TEPPbBr3-modified perovskite exhibits optimized carrier dynamics, yielding a champion efficiency of 25.13% with a small voltage loss of 0.34 V. Furthermore, the target device maintains 90% of its initial PCE under maximum power point (MPP) tracking over 1000 h. This work establishes a promising pathway through single crystal seed based epitaxial growth for achieving satisfactory crystallization regulation and phase stabilization of alpha-FAPbI(3) perovskites toward high-efficiency and stable PSCs.

引用

页码：5308 / 5316

页数：9

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