Direct Integration of Perovskite Solar Cells with Carbon Fibre Substrates.

Integrating photovoltaic devices onto the surface of carbon fibre-reinforced polymer substrates should create materials with high mechanical strength that are also able to generate electrical power. Such devices are anticipated to find ready applications as structural, energy-harvesting systems in both the automotive and aeronautical sectors. Here, we demonstrate the fabrication of triple-cation perovskite n-i-p solar cells onto the surface of planarised carbon fibre-reinforced polymer substrates, with devices utilising a transparent top ITO contact. These devices also contain a "wrinkled" SiO 2 interlayer placed between the device and substrate which alleviates thermally-induced cracking of the bottom ITO layer. Our devices were found to have a stabilised power conversion efficiency of 14.5% and a specific power (power per weight) of 21.4 W g -1 (without encapsulation), making them highly suitable for mobile power applications. This article is protected by copyright. All rights reserved.