title: p-type Mesoscopic nickel oxide/organometallic perovskite heterojunction solar cells.
abstract: In this article, we present a new paradigm for organometallic hybrid perovskite solar cell using NiO inorganic metal oxide nanocrystalline as p-type electrode material and realized the first mesoscopic NiO/perovskite/[6,6]-phenyl C61-butyric acid methyl ester (PC61BM) heterojunction photovoltaic device. The photo-induced transient absorption spectroscopy results verified that the architecture is an effective p-type sensitized junction, which is the first inorganic p-type, metal oxide contact material for perovskite-based solar cell. Power conversion efficiency of 9.51% was achieved under AM 1.5 G illumination, which significantly surpassed the reported conventional p-type dye-sensitized solar cells. The replacement of the organic hole transport materials by a p-type metal oxide has the advantages to provide robust device architecture for further development of all-inorganic perovskite-based thin-film solar cells and tandem photovoltaics.
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Kuo-Chin
authors.initials: KC
authors.lastname: Wang
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Jun-Yuan
authors.initials: JY
authors.lastname: Jeng
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Po-Shen
authors.initials: PS
authors.lastname: Shen
authors.affiliation: Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan 300.
authors.forename: Yu-Cheng
authors.initials: YC
authors.lastname: Chang
authors.affiliation: Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan 300.
authors.forename: Eric Wei-Guang
authors.initials: EW
authors.lastname: Diau
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Cheng-Hung
authors.initials: CH
authors.lastname: Tsai
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Tzu-Yang
authors.initials: TY
authors.lastname: Chao
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Hsu-Cheng
authors.initials: HC
authors.lastname: Hsu
authors.affiliation: Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Pei-Ying
authors.initials: PY
authors.lastname: Lin
authors.affiliation: 1] Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701 [2] Advanced Optoelectronic Technology Center (AOTC) [3] Research Center for Energy Technology and Strategy (RCETS).
authors.forename: Peter
authors.initials: P
authors.lastname: Chen
authors.affiliation: 1] Department of Photonics, National Cheng Kung University, Tainan, Taiwan 701 [2] Advanced Optoelectronic Technology Center (AOTC) [3] Research Center for Energy Technology and Strategy (RCETS).
authors.forename: Tzung-Fang
authors.initials: TF
authors.lastname: Guo
authors.affiliation: Department of Chemical Engineering National Cheng Kung University, Tainan, Taiwan 701.
authors.forename: Ten-Chin
authors.initials: TC
authors.lastname: Wen
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