Simple Additive to MAPbI₃ Solution that Enhances Film Quality of Mini‐Module Perovskite Solar Cells Fabricated under Moderate Humidity

Abstract

An additive to perovskite material can play a crucial role in the fabrication of perovskite solar cells (PSCs); the additive treatment investigated herein produces promising overall power conversion efficiency (PCE) enhancements. Currently, the fabrication of PSCs is mainly carried out under the dry air of a glove box to avoid moisture adsorption by methylammonium lead iodide perovskites; these tight restrictions in how PSCs are fabricated hinder the possibility of their commercialization. In this study, a technique that uses C12F4N4 as an additive to the MAPbI3 for the one‐step deposition of perovskite layers under moderate humidity is presented; this approach is able to achieve high‐quality perovskite films despite the adverse condition. The added C12F4N4 bridges the gaps between the MAPbI3 grain boundaries and significantly enhances all the photovoltaic parameters compared to using pristine methylammonium lead iodide; this method even eventually enhances the overall PCE. Both, single‐cell and optimized five‐cell integrated mini‐module devices in moderately humid conditions are fabricated. This facile method presents new possibilities for scaling up PSCs production in humid environments.

Air-processed MAPbI3 perovskite solar cells achieve 20.87% efficiency and excellent bending resistance enabled via a polymer dual-passivation strategy

“…5d presents that the PCE of our MAPbI 3 -based device is evidently outstanding in comparison with the reported works. [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62] Fig. 5e implies that the light intensity is dependent on V oc , making further sense of the charge carrier recombination changes, and their expression was derived from the equation:…”

Residual strain reduction leads to efficiency and operational stability improvements in flexible perovskite solar cells

“…[29] Additive engineering is a readily strategy to tune the nucleation and growth process for high quality perovskite and enhance the environmental resistance. [30] The additive engineering has been applied for F-PSC to show an efficiency over 18.4%, which was the highest at the time reported. [15] The incorporation of soft polymers such as polymethyl methacrylate (PMMA), polyurethane (PU) into the perovskite layer could further enhance the flexibility and even stretchability of the as-coated perovskite layers and subsequence devices.…”