In- and Ga-based inorganic double perovskites with direct bandgaps for photovoltaic applications.

Machine learning bandgaps of double perovskites

The ability to make rapid and accurate predictions on bandgaps of double perovskites is of much practical interest for a range of applications. While quantum mechanical computations for high-fidelity bandgaps are enormously computation-time intensive and thus impractical in high throughput studies, informatics-based statistical learning approaches can be a promising alternative. Here we demonst...

The Dawn of Lead‐Free Perovskite Solar Cell: Highly Stable Double Perovskite Cs2AgBiBr6 Film

Recently, lead-free double perovskites have emerged as a promising environmentally friendly photovoltaic material for their intrinsic thermodynamic stability, appropriate bandgaps, small carrier effective masses, and low exciton binding energies. However, currently no solar cell based on these double perovskites has been reported, due to the challenge in film processing. Herein, a first lead-fr...

Importance of Spin-Orbit Coupling in Hybrid Organic/Inorganic Perovskites for Photovoltaic Applications

Red-to-Black Piezochromism in a Compressible Pb−I−SCN Layered Perovskite

M of controlling semiconductor bandgaps are of great importance in materials design. In particular, fabrication of layered heterostructures with controlled thickness and composition allows for the composite’s electronic structures to be modulated. In recent decades, 2D organic−inorganic perovskites have gained attention as self-assembling heterostructures, whose optoelectronic properties can be...

Ionic behavior of organic-inorganic metal halide perovskite based metal-oxide-semiconductor capacitors.

Organic-inorganic metal halide perovskites are promising semiconductors for optoelectronic applications. Despite the achievements in device performance, the electrical properties of perovskites have stagnated. Ion migration is speculated to be the main contributing factor for the many unusual electrical phenomena in perovskite-based devices. Here, to understand the intrinsic electrical behavior...