Themed collection Halide Perovskite Optoelectronics

Lakshminarayana Polavarapu, Maria Antonietta Loi, Haibo Zeng, and Joseph M. Luther introduce this Nanoscale themed collection on halide perovskite optoelectronics.

This minireview discloses the underlying challenges of perovskite indoor photovoltaics and summarizes the advanced strategies for indoor efficiency improvement.

This review summarizes the strategies on minimizing the open-circuit voltage (V_oc) loss in perovskite quantum dot solar cells (PQDSCs) and proposed feasible methods to further improve the V_oc of PQDSCs toward the radiative limit.

In this minireview, we highlight the current status of triplet generation at the perovskite/organic semiconductor interface. We provide a discussion of current roadblocks and possible future directions based on additional promising annihilators.

We discuss the lifetimes of perovskite devices from the perspective of corrosion science. Benefiting from a series of anti-corrosion strategies (passivation, surface coating etc.) used in corrosion science, the stability of the devices is remarkably enhanced.

Metal halide perovskite materials demonstrate immense potential for photovoltaic and electronic applications.

We reviewed recent findings regarding the synthesis of perovskite nanocrystals, their application in solar cells, the impact of surface chemistry and device interfaces on efficiency, and a perspective on the up-scaling of this technology.

Our study that correlates the optical emission dynamics with structural and vibrational properties of the two-dimensional layered perovskites. This provides novel insights on electron–phonon coupling in these materials.

Electron donor-acceptor systems between halide perovskites and molecular acceptors form promising p-n junctions for solar cells.

Pictorial representation of high-bandwidth WLEDs by utilizing combinations of perovskite quantum dots (PQDs) and organic materials as color converters under the excitation of a semipolar blue micro-LED.

Heterostructures of metal halide perovskites and TiO_x are efficient photocatalytic materials owing to the combination of the high absorption coefficients and long charge-carrier lifetimes of perovskites, and efficient photocatalytic activity of TiO_x.

A novel strategy to fabricate highly stable, substrate-free, flexible, and paper-like halide perovskite photodetectors using Zn-doped MA_0.6FA_0.4PbI₃ and cellulose nanocrystals.

Large area metal halide perovskite LEDs were fabricated by inkjet printing. Homogeneous drying and crystallization was facilitated by a guided and optimized gas flow.

In this work, we demonstrate a novel nanoarchitectonic approach to tailor perovskite crystal growth leading to the enhancement of the opto-electronic properties and power conversion efficiency of perovskite solar cells.

We determine the complex refractive index of perovskite QDs, for which we take advantage of a ligand-free synthetic approach that facilitates discriminating the contribution of the nanocrystals to the effective optical constant of the ensemble.

A new interfacial polymer material named povidone-iodine was reported. Due to the reduced defect density and improved interface contact, ultimately, we achieved attractive efficiency and considerable long-term stability.

Vacuum lamination is currently the best encapsulation for perovskite/silicon tandems. Here, we study the lamination process with two different thermoplastic encapsulants, comparing tandem performance and stability, according to IEC standards of certification.

Perovskite surface energetics upon functionalization with atomic scale insight and validity assessment of the empirical expression derived from the Helmholtz equation.

Photoluminescence microscopy and in situ spectroscopy reveal the mechanism of degradation of stable mixed cation perovskite films.

Efficient inter-particle coupling interactions in solution-phase CsPbBr₃ superlattices give rise to enhanced optoelectronic properties.

Cs₂AgInCl₆ double perovskite (DP) nanocrystals (NCs) are an emerging class of materials with promising application potential in photonics/optoelectronics owing to their nontoxicity, direct bandgap, and high thermal and moisture stability.

A two-dimensional Ruddlesden–Popper perovskite BA₂PbI₄ was systematically studied, including its crystal structure, microstructure, electronic structure, phonon dispersion, vibrational characteristics, etc.

A corrugated Dion–Jacobson 2D perovskite has been integrated with a 3D MAPbBr₃ perovskite by using a blend and bilayer approach for application in light emitting diodes.

The digital-to-analog conversion of the memristor is realized by adjusting the embedding concentration of Cs₂AgSbBr₆ nanoparticles.

This work elaborates on the decoration of metal oxides (ZnO and Fe₃O₄) between MXene sheets for use as the supporting geometry of PCBM electron transport layers (ETLs) in perovskite solar cells and X-ray detectors.

Record-long operational lifetime (T₅₀) of 10.3 h at 100 mA cm⁻² is achieved for FASnI₃-based perovskite LEDs through the inclusion of PEAI, which is found to improve crystallinity and suppress oxidation of the lead-free perovskites.

The effect of substitutional cation doping in the A-site of the nanoscale APbI₃ perovskite layer has been systematically investigated to achieve improvements in the charge-carrier dynamics and endurance of non-volatile bipolar (NVB) memory devices.

Exciton dynamics of perovskite nanocrystal transformed through Mn doping.

An ethylene glycol based solvent engineering strategy to prepare high-quality MAPbI₃ thick films for direct X-ray detectors.

Adding isopropylamonium cation in quasi-2D perovskite films leads to a change in phase distribution and orientation of crystalline domains, with efficient sky blue emission. This allows the fabrication of LEDs with high luminescence and color purity.

Lead halide perovskite nanocrystals possess incredible potential as next generation emitters due to their stellar set of optoelectronic properties.

Inverted perovskite nanocrystal light-emitting diodes with average 61% transmittance have been achieved with PFN as electron transport layer.

Functional nanocomposites fabricated by growing CsPbBr₃ perovskite QDs within Fe-doped zeolite X with improved stability for sensitive NH₃ detection.

By studying the temperature and pressure response of CsPbI₃ nanocrystals, we demonstrated that the lattice deformation mechanism strongly affects the material's bandgap and recombination dynamics in nanocrystals with different sizes.

We report an Al³⁺ bonding-doping synergistic strategy by anion exchange for stable deep-blue perovskite QD and QLED. The QD exhibits superior stability against moisture and electric field, the spectrum-stable QLED achieves an EQE of 1.38% at 463 nm.

MACl post-treatment of MAPbI₃ nanoparticles in a mixed solvent successfully suppresses surface traps, associated with an improved PL intensity and lifetime, brighter and longer ON-states in PL blinking, and a more stable, enhanced photocurrent.

The introduction of Zn²⁺ and Mn²⁺ to (Bmpip)₂[PbBr₄] effectively alters the polyhedral configuration from a PbBr₄²⁻ tetrahedron to a Pb₃Br₁₁⁵⁻ trimer. As a result, the self-trapped exciton emission properties are significantly enhanced.

A flexible electrode consisting of a thin percolation network of AgNWs inlaid on the surface of a flexible PUA substrate and a conductive layer is proposed, and the resulting devices exhibited desired flexibility and mechanical stability.

We report here two new semiconducting two-dimensional lead-free organic–inorganic compounds with an obvious photocurrent response.

Cs₂Sn_1−xTe_xCl₆ crystals are synthesized and can be used for post-processing fibers for LED and anti-counterfeiting materials.

Perovskite solar cell with a H₂O₂-derived SnO₂ film formed by atomic layer deposition (ALD) shows better stability than that with the H₂O-derived one due to the reduced surface hydroxyl defect.

We demonstrate that a material exhibiting a negative photoconductivity and resistive switching can manifest in-memory OR logic gate operations. We have considered devices based on silver-bismuth-iodide rudorffites for this function.

Iodide/triiodide redox shuttles as new additives are introduced to simultaneously passivate the cation and anion defects of methylammonium lead iodide-based perovskite solar cells.

Thermal degradation of perovskite photovoltaics is investigated in terms of the energetic and spatial distributions of the traps.

The PEAI additive helps in the crystal growth regulation of CsPbI₂Br perovskite, which contributes to indoor/outdoor photovoltaic implementation with exceptional conversion efficiency.

An exploration of the spin-photogalvanic effect for chiral lead halide perovskites. The effect originates from the coexistence of the Rashba spin orbit coupling and chiral-induced spin selectivity.

Here, we report a novel route to construct efficient thin-film perovskite solar cells from sintering of nanocrystals and a facile two-step sintering process is proposed to achieve precise control over the microstructure development.

To improve operational stability of perovskite (PSK) LEDs, we used red-emitting hydrophobic carbon dots to impart structural stability to 2D PSK and reduce band offset, improving the operational stability of device to 8 hours from less than 2 hours.

An in situ XPS measurement is proposed by employing a built-in charge neutralization system to simulate the practical operation of light-emitting diodes for unraveling the degraded electron durability of reduced-dimensional perovskite emitters.

A correlation between band alignment at an electron transport layer/perovskite interface and the locus of hysteresis in perovskite solar cells is proposed.

The chiro-optical properties of CsPbBr₃ nanoparticles (NP) capped by chiral organic ligands are strongly dependent on their size, with the CD response of the first exciton band decreasing 100-fold upon tripling the NP edge length.

All-inorganic perovskite nanocrystals are formulated for inkjet deposition and utilised as photosensitive layers in single layer graphene and inkjet-printed graphene detectors with high photoresponse in UV-vis range.

A second-step nucleation strategy was developed to control the monomer concentration of lead–iodine octahedra to induce the formation of a Pb(SO₃⁻)_x-rich surface, from which diverse CsPbI₃ assembly structures were realized.

The rare earth La cation is strategically introduced to fundamentally improve CsPbI₃ phase stability and emission efficiency (near-unity PLQY of 99.3%), prompting great enhancements in the perovskite light-emitting diodes.

Self-trapped exciton-derived energy transfer is a possible strategy to enhance the emission of Er at 1540 nm in lead-free double perovskite structures.

The Bi³⁺ and Te⁴⁺ co-doping strategy and in situ growth regulation via external oxygen vacancies were applied to Cs₂AgInCl₆ nanocrystals, resulting in a high photoluminescence quantum yield of 34%, as a consequence of restrained Ag/In vacancies.