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Open AccessJournal ArticleDOI

A mixed-cation lead mixed-halide perovskite absorber for tandem solar cells

TLDR
It is shown that using cesium ions along with formamidinium cations in lead bromide–iodide cells improved thermal and photostability and lead to high efficiency in single and tandem cells.
Abstract
Metal halide perovskite photovoltaic cells could potentially boost the efficiency of commercial silicon photovoltaic modules from ∼20 toward 30% when used in tandem architectures. An optimum perovskite cell optical band gap of ~1.75 electron volts (eV) can be achieved by varying halide composition, but to date, such materials have had poor photostability and thermal stability. Here we present a highly crystalline and compositionally photostable material, [HC(NH2)2](0.83)Cs(0.17)Pb(I(0.6)Br(0.4))3, with an optical band gap of ~1.74 eV, and we fabricated perovskite cells that reached open-circuit voltages of 1.2 volts and power conversion efficiency of over 17% on small areas and 14.7% on 0.715 cm(2) cells. By combining these perovskite cells with a 19%-efficient silicon cell, we demonstrated the feasibility of achieving >25%-efficient four-terminal tandem cells.

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Citations
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Journal ArticleDOI

The Dominant Energy Transport Pathway in Halide Perovskites: Photon Recycling or Carrier Diffusion?

TL;DR: In this article, a comparison of 3D bulk CH3NH3PbBr3 single crystal to 2D perovskite by depth-resolved two-photon PL spectra reveals the contribution of carrier diffusion on energy transport at a distance beyond diffusion length is constantly negligible, though the carrier diffusion indeed exists in the 3D crystal.
Journal ArticleDOI

Evolution of Iodoplumbate Complexes in Methylammonium Lead Iodide Perovskite Precursor Solutions

TL;DR: In this article, the local structure present in single-step precursor solutions of methylammonium lead iodide (MAPbI3) perovskite as a function of organic and inorganic precursor ratio, as well as with hydriodic acid (HI).
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Glutathione Modified Gold Nanoparticles for Sensitive Colorimetric Detection of Pb2+ Ions in Rainwater Polluted by Leaking Perovskite Solar Cells.

TL;DR: Evaluated Pb2+ concentration from the rainwater samples polluted by three types of markets promising PSCs with inductively coupled plasma mass spectrometry measurements (ICP-MS) and an optimized glutathione functionalized gold nanoparticles (GSH-AuNPs) colorimetric sensing assay, which indicates that the content of P b2+ from three P SCs are in the same order of magnitude under various conditions.
Journal ArticleDOI

All-inorganic Cs2CuX4 (X = Cl, Br, and Br/I) perovskite quantum dots with blue-green luminescence.

TL;DR: These perovskite QDs exhibited high quantum yield for blue-green light and excellent stability, while the particle size and photoluminescence wavelength could be tuned via the molar ratio of the raw materials.
References
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Journal ArticleDOI

Efficient Hybrid Solar Cells Based on Meso-Superstructured Organometal Halide Perovskites

TL;DR: A low-cost, solution-processable solar cell, based on a highly crystalline perovskite absorber with intense visible to near-infrared absorptivity, that has a power conversion efficiency of 10.9% in a single-junction device under simulated full sunlight is reported.
Journal ArticleDOI

Sequential deposition as a route to high-performance perovskite-sensitized solar cells

TL;DR: A sequential deposition method for the formation of the perovskite pigment within the porous metal oxide film that greatly increases the reproducibility of their performance and allows the fabrication of solid-state mesoscopic solar cells with unprecedented power conversion efficiencies and high stability.
Journal ArticleDOI

Efficient planar heterojunction perovskite solar cells by vapour deposition

TL;DR: It is shown that perovskite absorbers can function at the highest efficiencies in simplified device architectures, without the need for complex nanostructures.
Journal ArticleDOI

Solvent engineering for high-performance inorganic–organic hybrid perovskite solar cells

TL;DR: A bilayer architecture comprising the key features of mesoscopic and planar structures obtained by a fully solution-based process is reported, providing important progress towards the understanding of the role of solution-processing in the realization of low-cost and highly efficient perovskite solar cells.
Journal ArticleDOI

The emergence of perovskite solar cells

TL;DR: In this article, a review describes the rapid progress that has been made in hybrid organic-inorganic perovskite solar cells and their applications in the photovoltaic sector.
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