Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 244, Issue -, Pages 20-24Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2016.08.034
Keywords
Lead iodide perovskite; Perovskite solar cells; PVD; CVD; PbI2 deposition rate; Molecular intercalation
Funding
- Helmholtz-Energy Alliance Hybrid photovoltaics
- GR-Elect project (BMBF) [03X0142]
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In this work we fabricate all-vacuum processed methyl ammonium lead halide perovskite by a sequence of physical vapour deposition of PbI2 and chemical vapour deposition (CVD) of CH3NH3I under a static atmosphere. We demonstrate that for higher deposition rate the (001) planes of PbI2 film show a higher degree of alignment parallel to the sample's surface. From X-ray diffraction data of the resulted perovskite film we derive that the intercalation rate of CH3NH3I is fostered for PbI2 films with higher degree of (001) planes alignment. The stoichiometry of the produced perovskite film is also studied by Hard X-ray photoelectron spectroscopy measurements. Complete all-vacuum perovskite solar cells were fabricated on glass/ITO substrates coated by an ultra-thin (5 nm) Zn-phthalocyanine film as hole selective layer. A dependence of residual PbI2 on the solar cells performance is displayed, while photovoltaic devices with efficiency up to eta=11.6% were achieved. (C) 2016 Elsevier Inc. All rights reserved.
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