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DOI | 10.1016/j.gloenvcha.2016.10.009 |
The effect of illumination on the formation of metal halide perovskite films | |
Ummadisingu, Amita1; Steier, Ludmilla1,2; Seo, Ji-Youn1; Matsui, Taisuke1,3; Abate, Antonio1,4; Tress, Wolfgang1; Gratzel, Michael1 | |
2017-05-11 | |
发表期刊 | NATURE |
ISSN | 0028-0836 |
EISSN | 1476-4687 |
出版年 | 2017 |
卷号 | 545期号:7653页码:208-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; England; Japan; Germany |
英文摘要 | Optimizing the morphology of metal halide perovskite films is an important way to improve the performance of solar cells(1) when these materials are used as light harvesters(2), because film homogeneity is correlated with photovoltaic performance(3). Many device architectures and processing techniques have been explored with the aim of achieving high-performance devices(4), including single-step deposition(5), sequential deposition(6,7) and anti-solvent methods(1,8). Earlier studies have looked at the influence of reaction conditions on film quality(3), such as the concentration of the reactants9,10 and the reaction temperature(11). However, the precise mechanism of the reaction and the main factors that govern it are poorly understood. The consequent lack of control is the main reason for the large variability observed in perovskite morphology and the related solar-cell performance(2,3). Here we show that light has a strong influence on the rate of perovskite formation and on film morphology in both of the main deposition methods currently used: sequential deposition and the anti-solvent method. We study the reaction of a metal halide (lead iodide) with an organic compound (methylammonium iodide) using confocal laser scanning fluorescence microscopy and scanning electron microscopy. The lead iodide crystallizes before the intercalation of methylammonium iodide commences, producing the methylammonium lead iodide perovskite. We find that the formation of perovskite via such a sequential deposition is much accelerated by light. The influence of light on morphology is reflected in a doubling of solar-cell efficiency. Conversely, using the anti-solvent method to form methyl ammonium lead iodide perovskite in a single step from the same starting materials, we find that the best photovoltaic performance is obtained when films are produced in the dark. The discovery of light-activated crystallization not only identifies a previously unknown source of variability in opto-electronic properties, but also opens up new ways of tuning morphology and structuring perovskites for various applications. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000400963800031 |
WOS关键词 | SOLAR-CELLS ; PHOTOVOLTAIC PERFORMANCE ; CRYSTAL-GROWTH ; THIN-FILMS ; KINETICS ; CHARGE ; PBI2 |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/37854 |
专题 | 气候变化 |
作者单位 | 1.Ecole Polytech Fed Lausanne, LPI, Inst Chem Sci & Engn, Stn 6, CH-1015 Lausanne, Switzerland; 2.Imperial Coll London, Dept Chem, London SW7 2AZ, England; 3.Panasonic Corp, Adv Res Div, Adv Funct Mat Res Grp, 1006 Kadoma, Kadoma, Osaka 5718501, Japan; 4.Mat & Energie GmbH, Helmholtz Zentrum Berlin, Kekulestr 5, D-12489 Berlin, Germany |
推荐引用方式 GB/T 7714 | Ummadisingu, Amita,Steier, Ludmilla,Seo, Ji-Youn,et al. The effect of illumination on the formation of metal halide perovskite films[J]. NATURE,2017,545(7653):208-+. |
APA | Ummadisingu, Amita.,Steier, Ludmilla.,Seo, Ji-Youn.,Matsui, Taisuke.,Abate, Antonio.,...&Gratzel, Michael.(2017).The effect of illumination on the formation of metal halide perovskite films.NATURE,545(7653),208-+. |
MLA | Ummadisingu, Amita,et al."The effect of illumination on the formation of metal halide perovskite films".NATURE 545.7653(2017):208-+. |
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