zhezhi huang

The methylammonium (MA) and formamidinium (FA) are the most commonly used organic cations in perovskite solar cells (PSCs), whereas the impact of size and polarity differences between these two on the photovoltaic performances has been rarely revealed. Herein, we systematically investigated the phase distribution, optoelectronic and stability properties of FA-MA mixed perovskites. To identify the phase homogeneity, depth-dependent grazing-incidence wide-angle x-ray scattering measurements were employed, which demonstrates that the mixed cation perovskite possesses a FA-rich phase on the film surface and the bottom is comprised of MA-rich phase. Additionally, upon long-time illumination, a new PL peak is appeared at 778 nm, representing the generation of MA-rich phase induced by ion migration. It is worth noting that the phase splitting and inhomogeneous phase distribution would not bring any obvious detrimental effects to the photovoltaic performances and stability properties. T...

Your flexible friend: Flexible perovskite solar cells have potential applications in portable electronics, wearable power sources, electronic textiles, and large‐scale industrial roofing, owing to its high efficiency, lightweight, flexibility, and suitability for roll‐to‐roll production. This Review summarizes the development of materials for flexible perovskite solar cells.

Abstract

The perovskite solar cells (PSCs) have emerged as an established technology during the last decade, with the record efficiency of such solar cells having increased from 3.8 % to 25.5 %. Recently, flexible perovskite solar cells (fPSCs) have received much attention from the academic and the industrial communities, owing to their potential for various niche applications, including portable electronics, wearable power sources, electronic textiles, and large‐scale industrial roofing. fPSCs are lightweight, bendable, and suitable for roll‐to‐roll industrial production and can be integrated easily over any surface. This Review discusses the recent development of materials for fPSCs based on various flexible substrates, including plastic, metal, and other flexible substrates, as well as fiber‐shaped perovskite solar cells, with a focus on the device structure, material selection for each layer, mechanical flexibility and the environmental stability of the fPSC devices. Finally, future applications and the outlook for fPSCs are also discussed.

Your flexible friend: Flexible perovskite solar cells have potential applications in portable electronics, wearable power sources, electronic textiles, and large‐scale industrial roofing, owing to its high efficiency, lightweight, flexibility, and suitability for roll‐to‐roll production. This Review summarizes the development of materials for flexible perovskite solar cells.

Abstract

The perovskite solar cells (PSCs) have emerged as an established technology during the last decade, with the record efficiency of such solar cells having increased from 3.8 % to 25.5 %. Recently, flexible perovskite solar cells (fPSCs) have received much attention from the academic and the industrial communities, owing to their potential for various niche applications, including portable electronics, wearable power sources, electronic textiles, and large‐scale industrial roofing. fPSCs are lightweight, bendable, and suitable for roll‐to‐roll industrial production and can be integrated easily over any surface. This Review discusses the recent development of materials for fPSCs based on various flexible substrates, including plastic, metal, and other flexible substrates, as well as fiber‐shaped perovskite solar cells, with a focus on the device structure, material selection for each layer, mechanical flexibility and the environmental stability of the fPSC devices. Finally, future applications and the outlook for fPSCs are also discussed.

“Interface engineering is an important strategy for perovskite solar cells…” This and more about the story behind the research that inspired the Cover image is presented in the Cover Profile. Read the full text of the corresponding research at 10.1002/cssc.202001629. View the Front Cover here: 10.1002/cssc.202002047.

Abstract

Invited for this month′s cover is the group of Shuang Yang at the East China University of Science and Technology. The image shows a dendrite‐structured interlayer for CsPbI₂Br perovskite solar cells. The Full Paper itself is available at 10.1002/cssc.202001629.