Table of Contents
What is ion migration in perovskite solar cells?
Ion migration is a solid-state electrochemical phenomenon widely observed in the family of halide perovskite materials, which is attributed to their intrinsically soft ionic crystal structures and mixed electronic–ionic conduction properties.
What is FTO in perovskite solar cell?
The TCO (transparent conducting oxide) substrate is a critical component for dye-sensitized and perovskite solar cells. It should have high transmission, good conductivity, and promote good adhesion for the deposited layers. Dyenamo offers FTO (fluorine-doped tinoxide) glass especially designed for such applications.
What is the process of perovskite?
In one-step deposition, a perovskite precursor solution that is prepared by mixing lead halide and organic halide together, is directly deposited through various coating methods, such as spin coating, spraying, blade coating, and slot-die coating, to form perovskite film.
What is hysteresis in perovskite solar cell?
The presence of hysteresis in perovskite solar cells (PSCs) complicates the reliable evaluation of cell performance for practical applications. Generally, the hysteric behavior in a PSC arises due to ferroelectric polarization, charge carrier trapping/detrapping, and ion migration in the perovskite materials.
What is ion migration?
Movement of a charged particle through an electrolyte toward an electrode of opposite charge sign. The losses in a neutral salt around two electrodes during the passage of electric current are in ratio to velocities of ions migrating from these electrodes.
Why is TiO2 used in solar cells?
We used TiO2 as an active material that absorbs photons and converts them into electric current. This material has a band gap around 3.2–3.8 eV, allowing the effective absorption of ultraviolet light. Only a few electron–hole pairs are produced when the material is illuminated by the solar spectrum.
What is fluorine doped tin oxide?
Abstract: Fluorine-doped tin oxide (FTO) is one of the most studied and established materials for transparent electrode applications. High-quality SnO2 quantum dots are synthesized with a tuneable fluorine amount up to ~10\% atomic, and their structural, morphological and optical properties are fully characterized.
How does a perovskite cell work?
Perovskite solar cells of certain compositions can convert ultraviolet and visible light into electricity very efficiently, meaning they might be excellent hybrid-tandem partners for absorber materials such as crystalline silicon that efficiently convert infrared light.
What is the function of perovskite material in solar cells?
The properties of perovskite materials such as high ion mobility, long carrier charge lifetime, and long carrier charge diffusion length enable the materials to be utilized as a light-absorbing layer in solar cells.
Why do perovskite solar cells high efficiency show small IV curve hysteresis?
High charge carrier mobilities up to 20 cm2/Vs have been measured [32], [39]. Both of these factors lead to a long diffusion length, which results in an efficient charge extraction. Therefore a high surface recombination is probably the dominant cause for the IV-curve hysteresis in perovskite solar cells.
Which ions will migrate to the cathode during electrolysis?
If you apply an electrical current, the positive ions migrate to the cathode while the negative ions will migrate to the anode. Positive ions are called cations and are all metals. Because of their valency they lost electrons and are able to pick up electrons.