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Effects of gas blowing condition on formation of mixed halide perovskite layer on organic scaffolds

Published online by Cambridge University Press:  13 July 2017

Takeshi Gotanda*
Affiliation:
Corporate Research & Development Center, Toshiba Corporation, Saiwai-ku, Kawasaki 212-8582, Japan
Shigehiko Mori
Affiliation:
Corporate Research & Development Center, Toshiba Corporation, Saiwai-ku, Kawasaki 212-8582, Japan
Haruhi Oooka
Affiliation:
Corporate Research & Development Center, Toshiba Corporation, Saiwai-ku, Kawasaki 212-8582, Japan
Hyangmi Jung
Affiliation:
Corporate Research & Development Center, Toshiba Corporation, Saiwai-ku, Kawasaki 212-8582, Japan
Hideyuki Nakao
Affiliation:
Corporate Research & Development Center, Toshiba Corporation, Saiwai-ku, Kawasaki 212-8582, Japan
Kenji Todori
Affiliation:
Corporate Research & Development Center, Toshiba Corporation, Saiwai-ku, Kawasaki 212-8582, Japan
Yutaka Nakai
Affiliation:
Corporate Research & Development Center, Toshiba Corporation, Saiwai-ku, Kawasaki 212-8582, Japan
*
a) Address all correspondence to this author. e-mail: takeshi.gotanda@toshiba.co.jp
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Abstract

Perovskite solar cells are promising for realizing high power conversion efficiency (PCE) with low manufacturing costs, but efficient coating methods are needed for commercialization. Here, a gas blowing method was used to fabricate perovskite solar cells and was found to create a smooth perovskite layer and to prevent voids in large-area cells, when organic materials were used as scaffolds for forming the perovskite. A PCE of 13% in a 1 cm2 active area is achieved by tuning the band-gap energy of MAPbX3 via substitution of Br for I ions in X sites. Incorporation of a poly(3,4-ethylenedioxythiophene) hole transport layer with a higher work function increased the open circuit voltage of the solar cells. All layers of the cells were fabricated at low temperatures (<140 °C), which makes it possible to incorporate a polymer substrate for producing flexible solar cells and high-throughput fabrication.

Type
Invited Paper
Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Sam Zhang

References

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