title: CH₃NH₃PbI₃-based planar solar cells with magnetron-sputtered nickel oxide.
abstract: Herein we report an investigation of a CH3NH3PbI3 planar solar cell, showing significant power conversion efficiency (PCE) improvement from 4.88% to 6.13% by introducing a homogeneous and uniform NiO blocking interlayer fabricated with the reactive magnetron sputtering method. The sputtered NiO layer exhibits enhanced crystallization, high transmittance, and uniform surface morphology as well as a preferred in-plane orientation of the (200) plane. The PCE of the sputtered-NiO-based perovskite p-i-n planar solar cell can be further promoted to 9.83% when a homogeneous and dense perovskite layer is formed with solvent-engineering technology, showing an impressive open circuit voltage of 1.10 V. This is about 33% higher than that of devices using the conventional spray pyrolysis of NiO onto a transparent conducting glass. These results highlight the importance of a morphology- and crystallization-compatible interlayer toward a high-performance inverted perovskite planar solar cell.
authors.affiliation: Michael Grätzel Centre for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , Wuhan, 430074 Hubei, People's Republic of China.
authors.forename: Jin
authors.initials: J
authors.lastname: Cui
authors.forename: Fanping
authors.initials: F
authors.lastname: Meng
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.forename: Kun
authors.initials: K
authors.lastname: Cao
authors.forename: Huailiang
authors.initials: H
authors.lastname: Yuan
authors.forename: Yibing
authors.initials: Y
authors.lastname: Cheng
authors.forename: Feng
authors.initials: F
authors.lastname: Huang
authors.forename: Mingkui
authors.initials: M
authors.lastname: Wang
keywords: NiO blocking layer; magnetron sputtering; perovskite; solar cell; solvent engineering