Hole-conductor free ambient processed mixed halide perovskite solar cells

•Cuboid nanostructured mixed halide films were prepared by dip coating method.•Cuboid nanostructures are favourable for better photovoltaic performance.•Mixed halide films for ambient processed hole conductor free perovskite solar cells.•Device made with the cuboid nanostructured films showed superi...

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Bibliographic Details
Published in:Materials letters 2019-06, Vol.245, p.226-229
Main Authors: Maniarasu, Suresh, Rajbhar, Manoj Kumar, Dileep, Reshma K., Ramasamy, Easwaramoorthi, Veerappan, Ganapathy
Format: Article
Language:English
Subjects:
Ambient processed
Conductors
Deposition
Hole conductor free solar cells
Immersion coating
Materials science
Measurement methods
Mixed halide perovskite
Morphology
Perovskite solar cells
Perovskites
Photovoltaic cells
Pinholes
Solar cells
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Summary:•Cuboid nanostructured mixed halide films were prepared by dip coating method.•Cuboid nanostructures are favourable for better photovoltaic performance.•Mixed halide films for ambient processed hole conductor free perovskite solar cells.•Device made with the cuboid nanostructured films showed superior efficiency (6.5%). In the past several years, organic-inorganic halide based perovskites has become an exciting topic in the field of photovoltaic community. Conventional perovskite solar cells (PSC) use 2,2′,7,7′-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD) as a hole transporting layer (HTL), but the cost and stability of the polymeric HTL affects the scaling-up of PSC. This work, reports a hole- conductor free-ambient processed mixed halide PSCs with promising efficiency by tuning the morphology of the perovskite films by employing different deposition techniques (one step, two-step and dip coating method). In the dip coating method, unique cuboid structured films with good absorption and pin hole free films were obtained. The photovoltaic performances of the devices made by various deposition methods were measured at 1 sun illumination under standard conditions and achieved upto 6.5%.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.03.021