Carrier-resolved photo-Hall effect

Heterogeneous photocatalysts: an overview of classic and modern approaches for optical, electronic, and charge dynamics evaluation

“…2The m values obtained, either the drift mobility from conductivity measurements or the Hall mobility from Hall measurements, are the majority carrier mobility. Methods using photo-Hall measurements to determine both the majority and minority carrier mobility have been recently developed, 27 but these methods are not yet widely used. 3In addition, many of the semiconductor photoelectrodes of interest for solar water splitting have very high resistivity; measuring their s is therefore not trivial.…”

Impact of PbI2 Passivation and Grain Size Engineering in CH3NH3PbI3 Solar Absorbers as Revealed by Carrier‐Resolved Photo‐Hall Technique

“…To determine the impact of extra PbI 2 on minority and majority carrier properties, we carried out CRPH measurement with an ac magnetic field employing two samples per condition. A complete description of the CRPH technique has been recently reported by Gunawan et al [29] The extraction of electrical parameters for both electrons and holes relies on measuring the Hall coefficient H and conductivity σ at different light intensities, which varies by up to eight orders of magnitude. At any illumination, the conductivity and Hall coefficient depend on both electron and hole mobility and density, given by the following relations:…”

“…In this work we use a newly developed carrier-resolved photo-Hall (CRPH) characterization technique using parallel dipole line ac Hall system. [29,30] This carrier-resolved photo-Hall technique gives simultaneous access to both majority and minority carriers properties. In addition, carrier recombination lifetime and diffusion length can be extracted with this technique as a function of light intensity and including intensities comparable to 1 sun (the most important regime for solar application).…”

“…properties. In the current study, we use a new equation derived by Gunawan et al [29] , which enables the determination of excess carrier density as well as mobility for majority and minority carriers using light intensity-dependent photo Hall measurements. Hall measurements in perovskite films are generally very challenging due to the medium to low range mobility (~10 cm 2 /Vs) and very high sample resistance (>100M).…”

Transparent Electrodes Consisting of a Surface‐Treated Buffer Layer Based on Tungsten Oxide for Semitransparent Perovskite Solar Cells and Four‐Terminal Tandem Applications

“…Inorganic–organic lead halide perovskites have high absorption coefficients and long diffusion lengths with easily tunable band gaps through composition engineering. [ 3–10 ] High efficiency, low material cost, and simple solution processing make PSCs a highly promising source of sustainable energy as either single‐junction devices or in tandem structures on top of other solar cells with narrower band gap absorbers, such as silicon, chalcogenides, and Sn‐containing materials. [ 11–20 ] In particular, further improvement of silicon solar cell efficiencies through silicon‐perovskite tandems is realistic business models, considering that over 90% of the photovoltaic market is dominated by single‐junction silicon solar cells.…”