Fabrication of Nickel Oxide Nanopillar Arrays on Flexible Electrodes for Highly Efficient Perovskite Solar Cells

Abstract

Semiconductor nanomaterials with controlled morphologies and architectures are of critical importance for high-performance optoelectronic devices. However, the fabrication of such nanomaterials on polymer-based flexible electrodes is particularly challenging due to degradation of the flexible electrodes at a high temperature. Here we report the fabrication of nickel oxide nanopillar arrays (NiO x NaPAs) on a flexible electrode by vapor deposition, which enables highly efficient perovskite solar cells (PSCs). The NiO x NaPAs exhibit an enhanced light transmittance for light harvesting, prohibit exciton recombination, promote irradiation-generated hole transport and collection, and facilitate the formation of large perovskite grains. These advantageous features result in a high efficiency of 20% and 17% for the rigid and flexible PSCs, respectively. Additionally, the NaPAs show no cracking after 500 times of bending, consistent with the mechanic simulation results. This robust fabrication opens a new opportunity for the fabrication of a large area of high-performance flexible optoelectronic devices.

Molecular Ferroelectrics‐Driven High‐Performance Perovskite Solar Cells

“…[5] Considerable efforts have been devoted to address these issues through crystal grain growth, [6] heterojunction engineering, [7] additive implantation, [8] surface molecular passivation, [5d,9] and rational design of nano-array architectures. [10] Therefore,e nhancing the built-in electric field to facilitate the separation and transportation of electrons and holes and passivating defects to minimize the nonradiative recombination are of significance for efficient PSCs.…”

3 D NiO Nanowall Hole‐Transporting Layer for the Passivation of Interfacial Contact in Inverted Perovskite Solar Cells

“…The histogramo fd evices (70 cells) in Figure 6c demonstrates good reproducibility.C onsidering the appreciable device performance, we also comparedo ur devices with other reported high-performance NiO-based PSCs (PCE > 18 %). [46][47][48][49][50][51][52][53][54][55][56] The statistics of the related V oc and FF are presented in Figure 6d.C learly,the impressive V oc ( % 1.11V)with high FF (> 80 %) of our devices is prominent in the reported works.…”

Malleability and Pliability of Silk‐Derived Electrodes for Efficient Deformable Perovskite Solar Cells

“…As is well known, perovskite has been widely studied and applied in optoelectronics field due to its excellent photoelectric parameters and ferroelectric properties . The distinct merits of PSCs aim to the high efficiency and flexibility in comparison with conventional silicon‐based solar cells . Figure 4 a shows the flexible PSCs based on SDEs with the structure of SDE/highly conductive PEDOT:PSS (PH1000)/poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/perovskite (CH 3 NH 3 PbI 3 )/phenyl‐C 61 ‐butyric acid methyl ester (PCBM)/Ag.…”