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Interaction between Colloidal Quantum Dots and Halide Perovskites: Looking for Constructive Synergies
(American Chemical Society, 2019-02-19)
Colloidal quantum dots (QDs) have received extensive attention during the last few decades because of their amazing properties emerging from quantum confinement. In parallel, halide perovskites have attracted attention ...
Utilization of Temperature-Sweeping Capacitive Techniques to Evaluate Band Gap Defect Densities in Photovoltaic Perovskites
(American Chemical Society, 2019-06-12)
Capacitive techniques, routinely used for solar cell parameter extraction, probe the voltage-modulation of the depletion layer capacitance isothermally as well as under varying temperature. In addition, defect states within ...
Welcoming the First Decade of Perovskite Solar Cells
(Wiley, 2019-09-02)
The swift emergence of perovskite solar cells (PSCs) is a “miracle” development in the history of photovoltaics. Since Miyasaka and co‐workers (Toin University of Yokohama, Japan) reported the first use of halide perovskites ...
Photocatalytic and Photoelectrochemical Degradation of Organic Compounds with All-Inorganic Metal Halide Perovskite Quantum Dots
(American Chemical Society, 2019-01)
Inspired by the outstanding optoelectronic properties reported for all-inorganic halide perovskite quantum dots (QDs), we have evaluated the potential of these materials toward the photocatalytic and photoelectrochemical ...
PbS quantum dots as additives in methylammonium halide perovskite solar cells: the effect of quantum dot capping
(Royal Society of Chemistry, 2019-09)
Colloidal PbS quantum dots (QDs) have been successfully employed as additives in halide perovskite solar cells (PSCs) acting as nucleation centers in the perovskite crystallization process. For this strategy, the surface ...
Optical Characterization of Lead-Free Cs2SnI6 Double Perovskite Fabricated from Degraded and Reconstructed CsSnI3 Films
(American Chemical Society, 2019-12-02)
Halide perovskites have experienced a huge development in the past years, but they still have two major challenges for their massive implantation: the long-term stability and the use of lead. One of the most obvious lead-free ...
Ionic Effect Enhances Light Emission and the Photovoltage of Methylammonium Lead Bromide Perovskite Solar Cells by Reduced Surface Recombination
(2019-02-19)
The achievement of optimal power conversion efficiencies (PCEs) in wide-band-gap perovskite solar cells (PSCs) is delayed by photovoltage losses associated with poor understanding of recombination dynamics. In this work, ...
Impedance spectroscopy of perovskite/contact interface: Beneficial chemical reactivity effect
(AIP Publishing, 2019-09-25)
Understanding chemical reactivity of lead halide perovskite materials with contacts is crucial to improve the stability of these optoelectronic devices. The study of the physical and chemical interactions at the interfacial ...
Perovskite Solar Cell Modeling Using Light- and Voltage-Modulated Techniques
(American Chemical Society, 2019-02-27)
The analysis of the impedance spectroscopy (IS) data of perovskite solar cells (PSCs) has been challenging so far, with the low-frequency phenomena in particular yielding ambivalent results and interpretations. We tackle ...
Single-Exciton Amplified Spontaneous Emission in Thin Films of CsPbX3 (X = Br, I) Perovskite Nanocrystals
(American Chemical Society, 2019-09-23)
CsPbX3 perovskite nanocrystals (PNCs) have emerged as an excellent material for stimulated emission purposes, with even more prospective applications than conventional colloidal quantum dots. However, a better understanding ...