Device architecture for efficient, low-hysteresis flexible perovskite solar cells:. Replacing TiO2 with C-60 assisted by polyethylenimine ethoxylated interfacial layers

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We here report methylammonium lead-iodide-based perovskite solar cells (psSCs) in which a TiO2 layer (a de facto electron transport layer of psSCs) is replaced with a layer of C-60 evaporated onto indium tin oxide layers covered with polyethylenimine ethoxylated (PEIE) layers. Unlike TiO2 layers requiring a high-temperature sintering, C-60 is deposited while the substrate is held at room temperature, making it compatible with various plastic substrates for flexible psSCs. The PEIE layers are shown to play key roles, not only as an electron collecting interfacial layer but also as a surface modifier that helps maintain the integrity of the C-60 layers during spin-coating of the perovsldte active layers. Using the proposed device architecture, we demonstrate flexible psSCs that exhibit power conversion efficiency as high as 13.3% with low hysteresis.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2017-03
Language
English
Article Type
Article
Keywords

HOLE EXTRACTION LAYERS; ORGANOMETAL HALIDE PEROVSKITES; POWER CONVERSION EFFICIENCY; I-V HYSTERESIS; THIN-FILMS; CH(3)NH(3)PBL(3) PEROVSKITE; ELECTRONIC-STRUCTURE; VAPOR-DEPOSITION; LOW-TEMPERATURE; COMPACT LAYER

Citation

SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.161, pp.338 - 346

ISSN
0927-0248
DOI
10.1016/j.solmat.2016.11.031
URI
http://hdl.handle.net/10203/220850
Appears in Collection
EE-Journal Papers(저널논문)
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