Charge-Carrier Recombination in Halide Perovskites

Abstract

In 1983 he was in the very small inaugural group promoted by Sandia National Laboratories to be a Distinguished Member of Technical Staff. He retired from Sandia but continues his research while an Adjunct Professor in the Department of Physics and Astronomy of the University of New Mexico. In 2008 David Emin was named an "outstanding referee" by the American Physical Society in its first round of selectees. Thomas Kirchartz received his PhD from the RWTH Aachen in 2009 and subsequently moved to Imperial College London working on organic solar cells with Prof. Jenny Nelson. In 2013, he was appointed Professor at the University of Duisburg-Essen (Electrical Engineering) and became head of a group working on characterization and simulation of solution-processable solar cells at the Research Centre Jülich. Since 2017, he is deputy head of the IEK-5 Photovoltaics, the institute dealing with all photovoltaics-related research at the Research Centre Jülich.

Shining Light on the Photoluminescence Properties of Metal Halide Perovskites

“…This chain of events can continue until the photon escapes from the sample or device, or until the photoexcited charge carriers undergo nonradiative recombination. This has the impact of reducing the apparent bimolecular rate constant ( k 2 ) by a factor related to the escape probability ( P esc ), making the effective rate equation that of Equation (7) [ 56,64 ] …”

Investigating the Tetragonal‐to‐Orthorhombic Phase Transition of Methylammonium Lead Iodide Single Crystals by Detailed Photoluminescence Analysis

“…In addition to the development of suitable film production methods, progress in understanding the relationship between the perovskite crystal structure and electronic structure, i.e., optical properties, is an important building block for their success. [ 1–3 ] In this context, the prototypical halide perovskite MAPbI 3 has developed as model system, as it also exhibits a temperature induced phase transition between tetragonal and orthorhombic crystal structure at around 160 K, which clearly affects its optical properties. [ 4–7 ] Various parameters have been identified which can influence this phase transition, such as the exact stoichiometry of the perovskite [ 8 ] or external constraints.…”

Effect of reabsorption and photon recycling on photoluminescence spectra and transients in lead-halide perovskite crystals

“…Approaching the radiative limit was so far only possible in III-V materials [18][19][20][21] or in low conductivity quantum dot films [22] but not in solution-processed, three dimensional semiconductors. Better understanding the fundamental reasons for the observed properties of halide perovskites would therefore be highly valuable [23,24]. While polycrystalline thin films are highly application relevant, their properties vary strongly with the preparation conditions and their crystallinity with lateral variations having been shown to strongly affect device performance [25][26][27].…”

“…In addition, also efforts to make single crystal perovskite solar cells are pursued [37,38] with a recent report of efficiencies exceeding 20% [38]. Close to the radiative limit, physical phenomena such as photon recycling [23,39,40] become important that are not or hardly relevant for most materials used in photovoltaics. Photon recycling specifies the process of photogeneration of electron-hole pairs by photons that are created by radiative recombination of electron-hole pairs.…”