scispace - formally typeset
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.

read more

Citations
More filters
Journal ArticleDOI

Green Perovskite Distributed Feedback Lasers.

TL;DR: The visible perovskite distributed feedback lasers fabricated for the first time were able to support multiple polarisations, and could be switched between transverse magnetic and transverse electric mode operation through simple tuning of the distributed feedback grating period.
Journal ArticleDOI

Microstructural Characterisations of Perovskite Solar Cells - From Grains to Interfaces: Techniques, Features, and Challenges

TL;DR: In this paper, an overview of some of the more commonly used characterization methods is given, their possible impact on the materials analyses is evaluated, and the latest developments in the understanding of the microstructure of perovskite solar cells are summarized.
Journal ArticleDOI

Fluoroalkyl-substituted fullerene/perovskite heterojunction for efficient and ambient stable perovskite solar cells

TL;DR: In this article, the authors investigated the feasibility of using a fluoroalkyl-substituted fullerene/perovskite heterojunction (f-FPHJ) to realize efficient and ambient stable perovskitic solar cells (PVSCs).
Journal ArticleDOI

Cu(II) Complexes as p‑Type Dopants in Efficient Perovskite Solar Cells

TL;DR: In this article, two Cu(II) pyridine compounds were designed and synthesized for applications as p-type dopants in solid-state perovskite solar cells (PSCs).
Journal ArticleDOI

In situ induced core/shell stabilized hybrid perovskites via gallium(III) acetylacetonate intermediate towards highly efficient and stable solar cells

TL;DR: In this article, the gallium(III) acetylacetonate (GaAA3) was introduced as a precursor additive to in situ induce a metal-organic-complex monomolecular intermediate (MOCM) to realize CsxFA1−xPbI3−[GaAA 3]4 (0 < x < 1) hybrid perovskite materials.
References
More filters
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.
Related Papers (5)