Incorporation of a Polyfluorinated Acrylate Additive for High-Performance Quasi-2D Perovskite Light-Emitting Diodes

Zhang, Tao; Gong, Simin; Chen, Ping; Chen, Qi; Chen, Liwei

doi:10.3866/pku.whxb202301024

Acta Physico Chimica Sinica

2023

DOI: 10.3866/pku.whxb202301024

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Incorporation of a Polyfluorinated Acrylate Additive for High-Performance Quasi-2D Perovskite Light-Emitting Diodes

Tao Zhang¹,

Simin Gong²,

Ping Chen³

et al.

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Cited by 4 publications

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In Situ Formation of Iodide Precursor for Perovskite Quantum Dots with Application in Efficient Solar Cells

Ye,

Chen,

Zhang

et al. 2024

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Perovskite quantum dots (PQDs) become a kind of competitive material for fabricating high‐performance solar cells due to their solution processability and outstanding optoelectronic properties. However, the current synthesis method of PQDs is mostly based on the binary‐precursor method, which results in a large deviation of the I/Pb input ratio in the reaction system from the stoichiometric ratio of PQDs. Herein, a ternary‐precursor method with an iodide source self‐filling ability is reported for the synthesis of the CsPbI3 PQDs with high optoelectronic properties. Systematically experimental characterizations and theoretical calculations are conducted to fundamentally understand the effects of the I/Pb input molar ratio on the crystallographic and optoelectronic properties of PQDs. The results reveal that increasing the I/Pb input molar ratio can obtain ideal cubic structure PQDs with iodine‐rich surfaces, which can significantly reduce the surface defects of PQDs and realize high orientation of PQD solids, facilitating charge carrier transport in the PQD solids with diminished nonradiative recombination. Consequently, the PQD solar cells exhibit an impressive efficiency of 15.16%, which is largely improved compared with that of 12.83% for the control solar cell. This work provides a feasible strategy for synthesizing high‐quality PQDs for high‐performance optoelectronic devices.

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In Situ Formation of Iodide Precursor for Perovskite Quantum Dots with Application in Efficient Solar Cells

Ye,

Chen,

Zhang

et al. 2024

Small

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Insights into the effects of oriented crystallization on the performance of quasi-two-dimensional perovskite solar cells

Jiang,

Tian,

et al. 2023

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Identification of the conductivity type of single-walled carbon nanotubes via dual-modulation dielectric force microscopy

Lai,

Wang,

Liu

et al. 2024

The Journal of Chemical Physics

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The conductivity type is one of the most fundamental transport properties of semiconductors, which is usually identified by fabricating the field-effect transistor, the Hall-effect device, etc. However, it is challenging to obtain an Ohmic contact if the sample is down to nanometer-scale because of the small size and intrinsic heterogeneity. Noncontact dielectric force microscopy (DFM) can identify the conductivity type of the sample by applying a DC gate voltage to the tip, which is effective in tuning the accumulation or depletion of charge carriers. Here, we further developed a dual-modulation DFM, which simplified the conductivity type identification from multiple scan times under different DC gate voltages to a single scan under an AC gate voltage. Taking single-walled carbon nanotubes as testing samples, the semiconducting-type sample exhibits a more significant charge carrier accumulation/depletion under each half-period of the AC gate voltage than the metallic-type sample due to the stronger rectification effect. The charge carrier accumulation or depletion of the p-type sample is opposite to that of the n-type sample at the same half-period of the AC gate voltage because of the reversed charge carrier type.

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Incorporation of a Polyfluorinated Acrylate Additive for High-Performance Quasi-2D Perovskite Light-Emitting Diodes

Cited by 4 publications

References 0 publications

In Situ Formation of Iodide Precursor for Perovskite Quantum Dots with Application in Efficient Solar Cells

In Situ Formation of Iodide Precursor for Perovskite Quantum Dots with Application in Efficient Solar Cells

Insights into the effects of oriented crystallization on the performance of quasi-two-dimensional perovskite solar cells

Identification of the conductivity type of single-walled carbon nanotubes via dual-modulation dielectric force microscopy

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