Perovskite solar cell

About: Perovskite solar cell is a research topic. Over the lifetime, 4701 publications have been published within this topic receiving 216807 citations. The topic is also known as: PSC.

Thermally induced structural evolution and performance of mesoporous block copolymer-directed alumina perovskite solar cells.

Abstract: Structure control in solution-processed hybrid perovskites is crucial to design and fabricate highly efficient solar cells. Here, we utilize in situ grazing incidence wide-angle X-ray scattering and scanning electron microscopy to investigate the structural evolution and film morphologies of methylammonium lead tri-iodide/chloride (CH3NH3PbI3–xClx) in mesoporous block copolymer derived alumina superstructures during thermal annealing. We show the CH3NH3PbI3–xClx material evolution to be characterized by three distinct structures: a crystalline precursor structure not described previously, a 3D perovskite structure, and a mixture of compounds resulting from degradation. Finally, we demonstrate how understanding the processing parameters provides the foundation needed for optimal perovskite film morphology and coverage, leading to enhanced block copolymer-directed perovskite solar cell performance.

Progress in Theoretical Study of Metal Halide Perovskite Solar Cell Materials

Abstract: Lead halide perovskites have recently emerged as promising absorbers for fabricating low-cost and high-efficiency thin-film solar cells. The record power conversion efficiency of lead halide perovskite-based solar cells has rapidly increased from 3.8% in 2009 to 22.1% in early 2016. Such rapid improvement is attributed to the superior and unique photovoltaic properties of lead halide perovskites, such as the extremely high optical absorption coefficients and super-long photogenerated carrier lifetimes and diffusion lengths that are not seen in any other polycrystalline thin-film solar cell materials. In the past a few years, theoretical approaches have been extensively applied to understand the fundamental mechanisms responsible for the superior photovoltaic properties of lead halide perovskites and have gained significant insights. This review article highlights the important theoretical results reported in literature for the understanding of the unique structural, electronic, optical, and defect properties of lead halide perovskite materials. For comparison, we also review the theoretical results reported in literature for some lead-free perovskites, double perovskites, and nonperovskites.

Synergy of ammonium chloride and moisture on perovskite crystallization for efficient printable mesoscopic solar cells.

Abstract: Organometal lead halide perovskites have been widely used as the light harvester for high-performance solar cells. However, typical perovskites of methylammonium lead halides (CH3NH3PbX3, X=Cl, Br, I) are usually sensitive to moisture in ambient air, and thus require an inert atmosphere to process. Here we demonstrate a moisture-induced transformation of perovskite crystals in a triple-layer scaffold of TiO2/ZrO2/Carbon to fabricate printable mesoscopic solar cells. An additive of ammonium chloride (NH4Cl) is employed to assist the crystallization of perovskite, wherein the formation and transition of intermediate CH3NH3X·NH4PbX3(H2O)2 (X=I or Cl) enables high-quality perovskite CH3NH3PbI3 crystals with preferential growth orientation. Correspondingly, the intrinsic perovskite devices based on CH3NH3PbI3 achieve an efficiency of 15.6% and a lifetime of over 130 days in ambient condition with 30% relative humidity. This ambient-processed printable perovskite solar cell provides a promising prospect for mass production, and will promote the development of perovskite-based photovoltaics.

Hysteresis-free low-temperature-processed planar perovskite solar cells with 19.1% efficiency

Abstract: Hysteresis-free, highly efficient and stable perovskite solar cells processed at low temperatures are strongly demanded to realize flexible or perovskite-based tandem solar cells Here, we report a hysteresis-free planar CH3NH3PbI3 perovskite solar cell with a power conversion efficiency of 191% using a room-temperature vacuum-processed C60 electron transport layer (ETL) without the hole blocking layer By optimizing the thickness of the C60 layer, the highly homogeneous, uniform, and dense ETL with a thickness of 35 nm is found to not only passivate the grain boundaries and surfaces of the perovskite layer, but also enhance charge transport properties Thus, the C60 layer deposited on perovskites eliminates the photocurrent hysteresis and improves the cell efficiency Also, compared to the device adopting the C60 and bathocuproine (BCP) combination, the one with the C60 layer without the BCP layer shows better performance due to enhanced electron extraction properties Furthermore, for the first time, we have demonstrated a hysteresis-free flexible perovskite solar cell using the C60 ETL on a polyethylene naphthalate (PEN) substrate with 160% efficiency

Integrating Perovskite Solar Cells into a Flexible Fiber

Abstract: Perovskite solar cells have triggered a rapid devel- opment of new photovoltaic devices because of high energy conversion efficiencies and their all-solid-state structures. To this end, they are particularly useful for various wearable and portable electronic devices. Perovskite solar cells with a flexible fiber structure were now prepared for the first time by continuously winding an aligned multiwalled carbon nanotube sheet electrode onto a fiber electrode; photoactive perovskite materials were incorporated in between them through a solu- tion process. The fiber-shaped perovskite solar cell exhibits an energy conversion efficiency of 3.3 %, which remained stable on bending. The perovskite solar cell fibers may be woven into electronic textiles for large-scale application by well-developed textile technologies. Perovskite materials with the formula CH3NH3PbX3 (X = Cl, Br, I) have been known for several decades and have recently attracted increasing attention because of their promising applicability in photovoltaics. (1-3) A typical perov- skite solar cell is composed of an n-type compact layer that blocks short circuits, a mesoporous TiO2 nanocrystal layer, a light-harvesting perovskite layer, a hole-transport layer, and two electrodes. The perovskite layer absorbs light to generate charges that are driven to be separated and transported by the built-in electric field between the two electrodes; this is followed by injection of the electrons into the conduction band of the TiO2 layer and of the holes into the hole-transport layer; they are then collected by the electrodes. (4, 5) Perovskite solar cells exhibit high energy conversion efficiencies of up to 16 %, which are much higher than those of polymer solar cells. (6-8) Furthermore, an all-solid-state structure is produced with high environmental stability, which is particularly important for high-performance flexible devices. (9, 10) Indeed, flexible perovskite solar cells with high energy conversion efficiencies, for example, 10.2 %, have recently been reported. (11, 12)