Monitoring the Phase Formation of Coevaporated Lead Halide Perovskite Thin Films by in Situ X-ray Diffraction

被引：96

作者：

Pistor, Paul ^{[1
]}

Borchert, Juliane ^{[1
]}

Fraenzel, Wolfgang ^{[1
]}

Csuk, Rene ^{[2
]}

Scheer, Roland ^{[1
]}

机构：

[1] Univ Halle Wittenberg, Inst Phys, D-06108 Halle, Saale, Germany

[2] Univ Halle Wittenberg, Inst Chem, D-06108 Halle, Saale, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2014年 / 5卷 / 19期

关键词：

HYBRID SOLAR-CELLS; EFFICIENT; PERFORMANCE; DEPOSITION;

D O I：

10.1021/jz5017312

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：

Perovskite solar cells based on (CH3NH3)Pb(I,Cl)(3) have recently demonstrated rapidly increasing cell efficiencies. Here, we show progress identifying phases present during the growth of (CH3NH3)Pb(I,Cl)(3) perovskite thin films with the vacuum-based coevaporation approach using two sources under varying deposition conditions. With in situ X-ray diffraction, crystalline phases can be identified and monitored in real time. For different (CH3NH3)I-to-PbCl2 flux ratios, two distinct (CH3NH3)Pb(IxCl(1-x))(3) phases with high (x > 0.95) and with lower (x < 0.5) iodine content as well as a broad miscibility gap in-between were found. During post deposition annealing we observe recrystallization and preferential orientation effects and finally the decomposition of the perovskite film to PbI2 at temperatures above 200 degrees C.

引用

页码：3308 / 3312

页数：5

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