(CH3NH3)2Pb(SCN)2I2: A More Stable Structural Motif for Hybrid Halide Photovoltaics?

Reversible photo-induced trap formation in mixed-halide hybrid perovskites for photovoltaics.

We report on reversible, light-induced transformations in (CH3NH3)Pb(Br x I1-x )3. Photoluminescence (PL) spectra of these perovskites develop a new, red-shifted peak at 1.68 eV that grows in intensity under constant, 1-sun illumination in less than a minute. This is accompanied by an increase in sub-bandgap absorption at ∼1.7 eV, indicating the formation of luminescent trap states. Light soaki...

Photovoltaics: More solar cells for less.

Structural alphabet motif discovery and a structural motif database

This study proposes a general framework for structural motif discovery. The framework is based on a modular design in which the system components can be modified or replaced independently to increase its applicability to various studies. It is a two-stage approach that first converts protein 3D structures into structural alphabet sequences, and then applies a sequence motif-finding tool to thes...

Structural and electronic features of small hybrid organic-inorganic halide perovskite clusters: a theoretical analysis.

We herein present the results of a series of calculations performed on some representative cluster models of hybrid organic-inorganic halide perovskites, (MA)jPbkXl (l = 2j + k; MA = methylammonium, +CH3NH3; X = halide). In particular, aimed at finding possible analogies with the bulk, we focused our initial attention on neutral clusters of iodides (X = I) constituted by an increasing number of...

Moving Towards a More Comprehensive Framework to Evaluate Distributed Photovoltaics

There is a growing interest in customer-owned generation with a particular interest in photovoltaic (PV) systems. This has resulted in a growing number of analytical studies aimed at determining their value. Two difficulties that these studies have encountered are how to select the proper evaluation perspective and which benefits and costs to include in the analysis. This paper presents a frame...