Supramolecular Modulation of Hybrid Perovskite Solar Cells via Bifunctional Halogen Bonding Revealed by Two-Dimensional 19F Solid-State NMR Spectroscopy

被引：85

作者：

Ruiz-Preciado, Marco A. ^{[1
]}

Kubicki, Dominik J. ^{[1
,2
,5
]}

Hofstetter, Albert ^{[2
]}

McGovern, Lucie ^{[3
]}

Futscher, Moritz H. ^{[3
]}

Ummadisingu, Anita ^{[1
,5
]}

Gershoni-Poranne, Renana ^{[4
]}

Zakeeruddin, Shaik M. ^{[1
]}

Ehrler, Bruno ^{[3
]}

Emsley, Lyndon ^{[2
]}

Milic, Jovana V. ^{[1
]}

Gratzel, Michael ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland

[2] Ecole Polytech Fed Lausanne, Lab Magnet Resonance, CH-1015 Lausanne, Switzerland

[3] AMOLF, Ctr Nanophoton, NL-1009 DB Amsterdam, Netherlands

[4] Swiss Fed Inst Technol, Lab Organ Chem, CH-8093 Zurich, Switzerland

[5] Univ Cambridge, Cavendish Lab, JJ Thomson Ave, Cambridge CB3 OHE, England

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2020年 / 142卷 / 03期

基金：

瑞士国家科学基金会; 欧盟地平线“2020”;

关键词：

PERFORMANCE; MIGRATION; IODIDE; DEGRADATION; PASSIVATION; EFFICIENCY; LIFETIMES; SURFACE; IMPACT;

D O I：

10.1021/jacs.9b13701

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

There has been an ongoing effort to overcome the limitations associated with the stability of hybrid organic-inorganic perovskite solar cells by using different organic agents as additives to the perovskite formulations. The functionality of organic additives has been predominantly limited to exploiting hydrogen-bonding interactions, while the relevant atomic-level binding modes remain elusive. Herein, we introduce a bifunctional supramolecular modulator, 1,2,4,5-tetrafluoro-3,6-diiodobenzene, which interacts with the surface of the triple-cation double-halide perovskite material via halogen bonding. We elucidate its binding mode using two-dimensional solid-state F-19 NMR spectroscopy in conjunction with density functional theory calculations. As a result, we demonstrate a stability enhancement of the perovskite solar cells upon supramolecular modulation, without compromising the photovoltaic performances.

引用

页码：1645 / 1654

页数：10

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