Can photoluminescence quenching be a predictor for perovskite solar cell efficiencies?

Geng, Xinjian; Liu, Yawen; Zou, Xianshao; Johansson, Erik M. J.; Sá, Jacinto

doi:10.1039/d3cp02190d

Cited by 8 publications

(2 citation statements)

References 57 publications

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“…(2) The thicker covering layer results in the deterioration of the carrier transport capacity. Cs 2 PbI 2 Cl 2 NSs coated with OA – and OLA + have a relatively moderate charge transfer capacity compared to ligand-exchanged CsPbI 3 PQDs (Ac – and PEA + ). , Insufficient carrier mobility increases the probability of unexpected recombination within interfaces, resulting in the reduced photovoltaic performance, as shown in Table S3 …”

Section: Resultsmentioning

confidence: 99%

Passivation of 2D Cs₂PbI₂Cl₂ Nanosheets for Efficient and Stable CsPbI₃ Quantum Dot Solar Cells

Liu,

Zhang,

Yang

et al. 2024

ACS Appl. Mater. Interfaces

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Inorganic CsPbI 3 perovskite quantum dots (PQDs) possess remarkable optical properties, making them highly promising for photovoltaic applications. However, the inadequate stability resulting from internal structural instability and the complex external surface chemical environment of CsPbI 3 PQDs has hindered the development of CsPbI 3 PQD solar cells (PQDSCs). In this work, the capping layer composed of inorganic two-dimensional (2D) Ruddlesden−Popper (RP) phase Cs 2 PbI 2 Cl 2 nanosheets (NSs) is introduced, which may be effectively treated to improve the surface properties of the CsPbI 3 PQD film. This modification serves to passivate defects by filling cesium and iodine vacancies while optimizing the energy band arrangement and preventing humidity intrusion, leading to the meliorative stability and photovoltaic performance. The optimized CsPbI 3 PQDSCs achieve an enhanced power conversion efficiency (PCE) of 14.73%, with the superb stability of only a 16% efficiency loss after being exposed to ambient conditions (30 ± 5% RH) for 432 h. KEYWORDS: RP Cs 2 PbI 2 Cl 2 nanosheets, CsPbI 3 quantum dot solar cells, passivation, energy band arrangement, stability

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Section: Resultsmentioning

confidence: 99%

Passivation of 2D Cs₂PbI₂Cl₂ Nanosheets for Efficient and Stable CsPbI₃ Quantum Dot Solar Cells

Liu,

Zhang,

Yang

et al. 2024

ACS Appl. Mater. Interfaces

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“…x = n FC /n is the fraction of free charges over the total density of excitations. The theoretical model that describes the relations between x, n, and temperature T for a 3D semiconductor can be expressed as [106]:…”

Section: Excitonic Featuresmentioning

confidence: 99%

The Scale Effects of Organometal Halide Perovskites

Zhang,

Zhao,

Liu

et al. 2023

Nanomaterials

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Organometal halide perovskites have achieved great success in solution-processed photovoltaics. The explorations quickly expanded into other optoelectronic applications, including light-emitting diodes, lasers, and photodetectors. An in-depth analysis of the special scale effects is essential to understand the working mechanisms of devices and optimize the materials towards an enhanced performance. Generally speaking, organometal halide perovskites can be classified in two ways. By controlling the morphological dimensionality, 2D perovskite nanoplatelets, 1D perovskite nanowires, and 0D perovskite quantum dots have been studied. Using appropriate organic and inorganic components, low-dimensional organic–inorganic metal halide hybrids with 2D, quasi-2D, 1D, and 0D structures at the molecular level have been developed and studied. This provides opportunities to investigate the scale-dependent properties. Here, we present the progress on the characteristics of scale effects in organometal halide perovskites in these two classifications, with a focus on carrier diffusion, excitonic features, and defect properties.

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Nanostructure and Photovoltaic Potential of Plasmonic Nanofibrous Active Layers

Schofield,

Maciejewska,

Elmestekawy

et al. 2024

Small

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Nanofibrous active layers offer hierarchical control over molecular structure, and the size and distribution of electron donor:acceptor domains, beyond conventional organic photovoltaic architectures. This structure is created by forming donor pathways via electrospinning nanofibers of semiconducting polymer, then infiltrating with an electron acceptor. Electrospinning induces chain and crystallite alignment, resulting in enhanced light‐harvesting and charge transport. Here, the charge transport capabilities are predicted, and charge separation and dynamics are evaluated in these active layers, to assess their photovoltaic potential. Through X‐ray and electron diffraction, the fiber nanostructure is elucidated, with uniaxial elongation of the electrospinning jet aligning the polymer backbones within crystallites orthogonal to the fiber axis, and amorphous chains parallel. It is revealed that this structure forms when anisotropic crystallites, pre‐assembled in solution, become oriented along the fiber– a configuration with high charge transport potential. Competitive dissociation of excitons formed in the photoactive nanofibers is recorded, with 95%+ photoluminescence quenching upon electron acceptor introduction. Transient absorption studies reveal that silver nanoparticle addition to the fibers improves charge generation and/or lifetimes. 1 ns post‐excitation, the plasmonic architecture contains 45% more polarons, per exciton formed, than the bulk heterojunction. Therefore, enhanced exciton populations may be successfully translated into additional charge carriers.

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Can photoluminescence quenching be a predictor for perovskite solar cell efficiencies?

Abstract: Bromide-based perovskites have large bandgaps, making them attractive for tandem solar cells developed to overcome the Shockley-Queisser limit. Perovskite solar cell architecture employs transporting layers to improve charge extraction and...

Cited by 8 publications

References 57 publications

Passivation of 2D Cs₂PbI₂Cl₂ Nanosheets for Efficient and Stable CsPbI₃ Quantum Dot Solar Cells

Passivation of 2D Cs₂PbI₂Cl₂ Nanosheets for Efficient and Stable CsPbI₃ Quantum Dot Solar Cells

The Scale Effects of Organometal Halide Perovskites

Nanostructure and Photovoltaic Potential of Plasmonic Nanofibrous Active Layers

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Can photoluminescence quenching be a predictor for perovskite solar cell efficiencies?

Abstract: Bromide-based perovskites have large bandgaps, making them attractive for tandem solar cells developed to overcome the Shockley-Queisser limit. Perovskite solar cell architecture employs transporting layers to improve charge extraction and...

Cited by 8 publications

References 57 publications

Passivation of 2D Cs2PbI2Cl2 Nanosheets for Efficient and Stable CsPbI3 Quantum Dot Solar Cells

Passivation of 2D Cs2PbI2Cl2 Nanosheets for Efficient and Stable CsPbI3 Quantum Dot Solar Cells

The Scale Effects of Organometal Halide Perovskites

Nanostructure and Photovoltaic Potential of Plasmonic Nanofibrous Active Layers

Contact Info

Product

Resources

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Passivation of 2D Cs₂PbI₂Cl₂ Nanosheets for Efficient and Stable CsPbI₃ Quantum Dot Solar Cells

Passivation of 2D Cs₂PbI₂Cl₂ Nanosheets for Efficient and Stable CsPbI₃ Quantum Dot Solar Cells