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Open AccessJournal ArticleDOI

Efficient luminescent solar cells based on tailored mixed-cation perovskites

TLDR
A new metal halide perovskite photovoltaic cell that exhibits both very high solar-to-electric power-conversion efficiency and intense electroluminescence is reported on.
Abstract
We report on a new metal halide perovskite photovoltaic cell that exhibits both very high solar-to-electric power-conversion efficiency and intense electroluminescence. We produce the perovskite films in a single step from a solution containing a mixture of FAI, PbI2, MABr, and PbBr2 (where FA stands for formamidinium cations and MA stands for methylammonium cations). Using mesoporous TiO2 and Spiro-OMeTAD as electron- and hole-specific contacts, respectively, we fabricate perovskite solar cells that achieve a maximum power-conversion efficiency of 20.8% for a PbI2/FAI molar ratio of 1.05 in the precursor solution. Rietveld analysis of x-ray diffraction data reveals that the excess PbI2 content incorporated into such a film is about 3 weight percent. Time-resolved photoluminescence decay measurements show that the small excess of PbI2 suppresses nonradiative charge carrier recombination. This in turn augments the external electroluminescence quantum efficiency to values of about 0.5%, a record for perovskite photovoltaics approaching that of the best silicon solar cells. Correspondingly, the open-circuit photovoltage reaches 1.18 V under AM 1.5 sunlight.

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Citations
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Journal ArticleDOI

Cd2SnO4 transparent conductive oxide: a promising alternative candidate for highly efficient hybrid halide perovskite solar cells

TL;DR: In this article, a transparent conductive oxide (Cd2SnO4) film was used for constructing a perovskite device with a novel structure, which showed higher optical transmission in the visible region compared to the FTO substrate.
Journal ArticleDOI

Development of hermetic glass frit encapsulation for perovskite solar cells

TL;DR: In this article, a laser-assisted glass frit encapsulation, at a process temperature of 120 °C, was developed for perovskite solar cell application, and the hermeticity and long-term stability of the sealing was examined based on standard tests for photovoltaic (PV) applications.
Journal ArticleDOI

3D hole-transporting materials based on coplanar quinolizino acridine for highly efficient perovskite solar cells

TL;DR: A new concept of HTMs for PSCs: a 3D structure with a core of coplanar quinolizino is firstly put forward and demonstrated to be highly effective, and it is derived from the conventional concept of 2D triphenylamine HTM.
Journal ArticleDOI

Efficient electron transfer layer based on Al2O3 passivated TiO2 nanorod arrays for high performance evaporation-route deposited FAPbI3 perovskite solar cells

TL;DR: In this paper, the authors reported Al 2 O 3 layer passivated TiO 2 nanorods (NRs) array as an electron transfer layer (ETL) for thermal evaporation-route synthesized formamidine lead iodine (FAPbI 3 ) PSCs.
Journal ArticleDOI

Viscosity effect of ionic liquid-assisted controlled growth of CH3NH3PbI3 nanoparticle-based planar perovskite solar cells

TL;DR: In this article, the authors tried to control the nanostructural growth of CH3NH3PbI3 thin films by adding Ionic liquids (ILs) to the perovskite spin-coating solution and investigate the effect of IL viscosity on the resulting NPs.
References
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Journal ArticleDOI

Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells

TL;DR: Two organolead halide perovskite nanocrystals were found to efficiently sensitize TiO(2) for visible-light conversion in photoelectrochemical cells, which exhibit strong band-gap absorptions as semiconductors.
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

High-performance photovoltaic perovskite layers fabricated through intramolecular exchange

TL;DR: An approach for depositing high-quality FAPbI3 films, involving FAP bI3 crystallization by the direct intramolecular exchange of dimethylsulfoxide (DMSO) molecules intercalated in PbI2 with formamidinium iodide is reported.
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