The Role of Oxygen in the Degradation of Methylammonium Lead Trihalide Perovskite Photoactive Layers

被引：918

作者：

Aristidou, Nicholas ^{[1
]}

Sanchez-Molina, Irene ^{[1
]}

Chotchuangchutchaval, Thana ^{[1
]}

Brown, Michael ^{[1
]}

Martinez, Luis ^{[1
]}

Rath, Thomas ^{[1
]}

Haque, Saif A. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 28期

基金：

奥地利科学基金会; 英国工程与自然科学研究理事会;

关键词：

methylammonium lead triiodide; perovskites; solar cells; spectroscopy; stability; CH3NH3PBI3; STATE; PERFORMANCE; DEPOSITION; EFFICIENCY; TIO2;

D O I：

10.1002/anie.201503153

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper we report on the influence of light and oxygen on the stability of CH3NH3PbI3 perovskite-based photoactive layers. When exposed to both light and dry air the mp-Al2O3/CH3NH3PbI3 photoactive layers rapidly decompose yielding methylamine, PbI2, and I-2 as products. We show that this degradation is initiated by the reaction of superoxide (O-2(-)) with the methylammonium moiety of the perovskite absorber. Fluorescent molecular probe studies indicate that the O-2(-) species is generated by the reaction of photoexcited electrons in the perovskite and molecular oxygen. We show that the yield of O-2(-) generation is significantly reduced when the mp-Al2O3 film is replaced with an mp-TiO2 electron extraction and transport layer. The present findings suggest that replacing the methylammonium component in CH3NH3PbI3 to a species without acid protons could improve tolerance to oxygen and enhance stability.

引用

页码：8208 / 8212

页数：5

共 17 条

[1] Synthesis and crystal chemistry of the hybrid perovskite (CH3NH3) PbI3 for solid-state sensitised solar cell applications [J].

Baikie, Tom ;

Fang, Yanan ;

Kadro, Jeannette M. ;

Schreyer, Martin ;

Wei, Fengxia ;

Mhaisalkar, Subodh G. ;

Graetzel, Michael ;

White, Tim J. .

JOURNAL OF MATERIALS CHEMISTRY A, 2013, 1 (18) :5628-5641

[2] Scalable route to CH3NH3PbI3 perovskite thin films by aerosol assisted chemical vapour deposition [J].

Bhachu, D. S. ;

Scanlon, D. O. ;

Saban, E. J. ;

Bronstein, H. ;

Parkin, I. P. ;

Carmalt, C. J. ;

Palgrave, R. G. .

JOURNAL OF MATERIALS CHEMISTRY A, 2015, 3 (17) :9071-9073

[3] Using a two-step deposition technique to prepare perovskite (CH3NH3PbI3) for thin film solar cells based on ZrO2 and TiO2 mesostructures [J].

Bi, Dongqin ;

Moon, Soo-Jin ;

Haggman, Leif ;

Boschloo, Gerrit ;

Yang, Lei ;

Johansson, Erik M. J. ;

Nazeeruddin, Mohammad K. ;

Graetzel, Michael ;

Hagfeldt, Anders .

RSC ADVANCES, 2013, 3 (41) :18762-18766

[4] Sequential deposition as a route to high-performance perovskite-sensitized solar cells [J].

Burschka, Julian ;

Pellet, Norman ;

Moon, Soo-Jin ;

Humphry-Baker, Robin ;

Gao, Peng ;

Nazeeruddin, Mohammad K. ;

Graetzel, Michael .

NATURE, 2013, 499 (7458) :316-+

[5] Transformation of the Excited State and Photovoltaic Efficiency of CH3NH3PbI3 Perovskite upon Controlled Exposure to Humidified Air [J].

Christians, Jeffrey A. ;

Miranda Herrera, Pierre A. ;

Kamat, Prashant V. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2015, 137 (04) :1530-1538

[6] Fluorescence probes used for detection of reactive oxygen species [J].

Gomes, A ;

Fernandes, E ;

Lima, JLFC .

JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS, 2005, 65 (2-3) :45-80

[7]

Jeon NJ, 2014, NAT MATER, V13, P897, DOI [10.1038/NMAT4014, 10.1038/nmat4014]

[8] Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites [J].

Lee, Michael M. ;

Teuscher, Joel ;

Miyasaka, Tsutomu ;

Murakami, Takurou N. ;

Snaith, Henry J. .

SCIENCE, 2012, 338 (6107) :643-647

[9] Overcoming ultraviolet light instability of sensitized TiO2 with meso-superstructured organometal tri-halide perovskite solar cells [J].

Leijtens, Tomas ;

Eperon, Giles E. ;

Pathak, Sandeep ;

Abate, Antonio ;

Lee, Michael M. ;

Snaith, Henry J. .

NATURE COMMUNICATIONS, 2013, 4

[10]

Malinkiewicz O, 2014, NAT PHOTONICS, V8, P128, DOI [10.1038/nphoton.2013.341, 10.1038/NPHOTON.2013.341]

← 1 2 →