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Effects of Frequency Dependence of the External Quantum Efficiency of Perovskite Solar Cells
(American Chemical Society, 2018-05)
Perovskite solar cells are known to show very long response time scales, on the order of milliseconds to seconds. This generates considerable doubt over the validity of the measured external quantum efficiency (EQE) and ...
Quantification of bio-anode capacitance in bioelectrochemical systems using Electrochemical Impedance Spectroscopy
(Elsevier, 2018-10)
Understanding the electrochemical properties of bio-anodes is essential to improve performance of bioelectrochemical systems. Electrochemical Impedance Spectroscopy (EIS) is often used to study these properties in detail. ...
Optical Optimization of the TiO2 Mesoporous Layer in Perovskite Solar Cells by the Addition of SiO2 Nanoparticles
(American Chemical Society:, 2018-08-23)
In this work, SiO2 nanoparticles (NPs) were integrated into the mesoporous TiO2 layer of a perovskite solar cell to investigate their effect on cell performance. Different concentrations of SiO2/ethanol have been combined ...
Crystalline-Size Dependence of Dual Emission Peak on Hybrid Organic Lead-Iodide Perovskite Films at Low Temperatures
(American Chemical Society, 2018-09)
In this work, we have investigated the crystalline-size dependence of optical absorption and photoluminescence emission of CH3NH3PbI3 films, which is necessary to identify the potential practical applications of the gadgets ...
Switching Off Hysteresis in Perovskite Solar Cells by Fine‐Tuning Energy Levels of Extraction Layers
(Wiley, 2018-07-25)
Lead halide perovskites often suffer from a strong hysteretic behavior on their j–V response in photovoltaic devices that has been correlated with slow ion migration. The electron extraction layer has frequently been pointed ...
Unravelling the role of vacancies in lead halide perovskite through electrical switching of photoluminescence
(Nature Research, 2018)
We address the behavior in which a bias voltage can be used to switch on and off the
photoluminescence of a planar film of methylammonium lead triiodide perovskite (MAPbI3)
semiconductor with lateral symmetric electrodes. ...
IrIII/AuI and RhIII/AuI Heterobimetallic Complexes as Catalysts for the Coupling of Nitrobenzene and Benzylic Alcohol
(American Chemical Society, 2018)
Two simple bisimidazolium salts derived from m- or
p-bisimidazolebenzenes have been used as ligand precursors for the
preparation of a series of heterobimetallic RhIII/AuI and IrIII/AuI
complexes. All complexes have ...
Pyrene-Connected Tetraimidazolylidene Complexes of Iridium and Rhodium. Structural Features and Catalytic Applications
(American Chemical Society, 2018)
A pyrene-connected tetra-imidazolium salt has been prepared starting from
commercially available 1,3,6,8-tetrabromopyrene, and used as tetra-NHC precursor in the
preparation of tetranuclear Rh(I) and Ir(I) complexes. The ...
Effect of Environmental Humidity on the Electrical Properties of Lead Halide Perovskites
(ACS, 2018-12)
In large quantities, water is detrimental to lead halide perovskite solar cells, mainly because of the decomposition of the perovskite layer. In contrast, the presence of small quantities of water has been observed to play ...
Effect of Light Illumination on Mixed Halide Lead Perovskites: Reversible or Irreversible Transformation
(American Chemical Society, 2018)
One intriguing aspect of mixed halide lead perovskites (e.g., CH3NH3PbBrxI3–x) is halide ion segregation when subjected to visible illumination, but this aspect gives rise to the concerns regarding the influence of halide ...