Methylammonium Triiodide for Defect Engineering of High-Efficiency Perovskite Solar Cells

被引：39

作者：

Alharbi, Essa A. ^{[1
]}

Krishna, Anurag ^{[2
]}

Baumeler, Thomas P. ^{[1
]}

Dankl, Mathias ^{[3
]}

Fish, George C. ^{[4
,5
]}

Eickemeyer, Felix ^{[1
]}

Ouellette, Olivier ^{[1
]}

Ahlawat, Paramvir ^{[3
]}

Skorjanc, Viktor ^{[1
]}

John, Elsa ^{[2
]}

Yang, Bowen ^{[2
]}

Pfeifer, Lukas ^{[1
]}

Avalos, Claudia Esther ^{[6
]}

Pan, Linfeng ^{[2
]}

Mensi, Mounir ^{[7
]}

Schouwink, Pascal Alexander ^{[7
]}

Moser, Jacques-E ^{[4
,5
]}

Hagfeldt, Anders ^{[2
]}

Rothlisberger, Ursula ^{[3
]}

Zakeeruddin, Shaik M. ^{[1
]}

Gratzel, Michael ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, Inst Chem Sci & Engn, Sch Basic Sci, CH-1015 Lausanne, Switzerland

[2] Ecole Polytech Fed Lausanne, Lab Photomol Sci, Inst Chem Sci & Engn, Sch Basic Sci, CH-1015 Lausanne, Switzerland

[3] Ecole Polytech Fed Lausanne EPFL, Lab Computat Chem & Biochem, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland

[4] Ecole Polytech Fed Lausanne, Photochem Dynam Grp, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland

[5] Ecole Polytech Fed Lausanne, Lausanne Ctr Ultrafast Sci, CH-1015 Lausanne, Switzerland

[6] Ecole Polytech Fed Lausanne, Lab Magnet Resonance, Inst Chem Sci & Engn, Sch Basic Sci, CH-1015 Lausanne, Switzerland

[7] Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn ISIC, CH-1950 Sion, Switzerland

来源：

ACS ENERGY LETTERS | 2021年 / 6卷 / 10期

基金：

瑞士国家科学基金会; 欧盟地平线“2020”;

关键词：

MOLECULAR-DYNAMICS; TEMPERATURE; PERFORMANCE; DEGRADATION;

D O I：

10.1021/acsenergylett.1c01754

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 defects present in metal halide perovskite are deleterious to both the performance and stability of photovoltaic devices. Consequently, there is an intense focus on developing defect mitigation strategies. Herein we report a facile strategy that employs methylammonium triiodide (MAI(3)) as an additive to the perovskite precursor solution. We examine the effect of MAI(3) on the structural and optoelectronic properties by X-ray diffraction, density functional theory calculations, molecular dynamics simulations, solid-state nuclear magnetic resonance, steady-state, time-resolved photoluminescence (TRPL), and time-resolved terahertz spectroscopy (TRTS). Specifically, TRPL and TRTS show that MAI(3) suppresses nonradiative recombination and increases the charge carrier mobility. As a result, the champion device shows a power conversion efficiency (PCE) of 23.46% with a high fill factor of >80%. Furthermore, these devices exhibit enhanced operational stability, with the best device retaining similar to 90% of its initial PCE under 1 sun illumination with maximum power point tracking for 350 h.

引用

页码：3650 / 3660

页数：11

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