Hindered Amine Light Stabilizers Increase the Stability of Methylammonium Lead Iodide Perovskite Against Light and Oxygen

被引：19

作者：

Marinova, Nevena ^{[1
]}

Franckevicius, Marius ^{[2
]}

Matulaitiene, Ieva ^{[2
]}

Devizis, Andrius ^{[2
]}

Niaura, Gediminas ^{[2
]}

Gulbinas, Vidmantas ^{[2
]}

Luis Delgado, Juan ^{[1
,3
]}

机构：

[1] Univ Basque Country, UPV EHU, POLYMAT, Ave Tolosa 72, Donostia San Sebastian, Spain

[2] Ctr Phys Sci & Technol, Sauletekio Ave 3, LT-10257 Vilnius, Lithuania

[3] Basque Fdn Sci, Ikerbasque, Bilbao 48011, Spain

来源：

CHEMSUSCHEM | 2017年 / 10卷 / 19期

关键词：

perovskites; photochemistry; oxidation; solar cells; stability; SOLAR-CELLS; ENVIRONMENTAL STABILITY; PERFORMANCE; FILMS; MECHANISM; SPECTRA;

D O I：

10.1002/cssc.201700707

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Methylammonium lead iodide perovskite (MAPI) is a promising material for highly efficient photovoltaic devices. However, it suffers from photooxidation, which imposes strict requirements for its protection from oxygen during processing and operation. A hindered amine light stabilizer (HALS) has been found to exert a stabilization effect on methylammonium iodide (MAI) and MAPI against photooxidation. The HALS prevents the degradation of MAI by inhibiting the oxidation of iodide to iodine. Chemical modification of HALS allows its incorporation in MAPI films, which extends the resistivity of MAPI against photodegradation in ambient air from a couple of hours to several days, while causing no significant changes in key properties, such as optical absorption and charge transport. These results represent an important advance in the stabilization of MAPI against decomposition and demonstrate for the first time that antioxidants improve the stability of MAPI.

引用

页码：3760 / 3764

页数：5

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