The Perovskite-Info newsletter

A team of researchers from Lund University (Sweden), the Russian Academy of Science (Russia) and the Technical University of Dresden (Germany) has developed a new methodology for the study of lead halide perovskites, based on the complete mapping of the photoluminescence quantum yield and decay dynamics in the two-dimensional (2D) space of both fluence and frequency of the excitation light pulse.

Such 2D maps not only offer a complete representation of the sample's photophysics, but also allow to examine the validity of theories, by applying a single set of theoretical equations and parameters to the entire data set.

Researchers from the University of Rome's CHOSE (Centre for Hybrid and Organic Solar Energy) and Fraunhofer ISE have developed a full semiautomatic scalable process based on the blade-coating technique, to fabricate perovskite solar modules in ambient conditions.

An efficient and stable triple-cation cesium methylammonium formamidinium (CsMAFA) perovskite is deposited in ambient air with a two-step process assisted by air and green anti-solvent quenching. The developed industry-compatible coating process enables the fabrication of several highly reproducible small-area cells on module size substrate with an efficiency exceeding 17% and with high reproducibility.

Researchers at the New York University (NYU) have designed a perovskite solar cell using a doping technique based on carbon dioxide (CO₂) instead of the commonly used oxygen doping approach.

The scientists described the common oxygen-based p-type doping process as one of the major hurdles to remove to bring perovskite closer to commercial production, as the technique is particularly time consuming and often requires hours to spread oxygen into a hole transporting layer of a perovskite cell.

An international team of researchers, including ones from Brown University, EPFL, Dalian University of Technology and Shaanxi Normal University, has developed a flexible thin-film perovskite solar cell with an efficiency of 21.0%.

The perovskite layer for the cell, which has an “n-i-p” layout, was fabricated using a metal-halide capping layer placed on top of a three-dimensional metal-halide perovskite film. This design reportedly provides hermetically sealed encapsulation, which is traditionally difficult to achieve in flexible perovskite cells, and also enhances the photocarrier properties at the interface between the perovskite film and the hole transport layer (HTL).

A team of researchers from Monash University, Wuhan University of Technology, The Hong Kong Polytechnic University, Swinburne University of Technology and Central South University has revealed defects in a popular perovskite light absorber that impede solar cell performance. The researchers found a change in the nature and density of these ‘intragrain planar defects’ correlated with a change in solar cell performance.

The research team used the imaging and diffraction protocol developed at the Monash Centre for Electron Microscopy (MCEM) to study the crystal structure of a range of perovskite solar cell materials in their pristine state.