Renovating the surface matrix of FAPbl<sub>3</sub> perovskite quantum dots <i>via</i> phase-transfer catalysis for 16.29% efficiency solar cells

Zhang, Mingxu; Gao, Qiyuan; Mei, Xinyi; Qiu, Junming; Zhuang, Rongshan; Hua, Yong; Sun, Zhimei; Zhang, Xiaoliang

doi:10.1039/d3ee03751g

Energy Environ. Sci.

2024

DOI: 10.1039/d3ee03751g

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Renovating the surface matrix of FAPbl₃ perovskite quantum dots via phase-transfer catalysis for 16.29% efficiency solar cells

Mingxu Zhang,

Qiyuan Gao,

Xinyi Mei

et al.

Abstract: A feasible surface matrix renovation strategy is reported, which could not only substantially eliminate surface vacancies but also predominantly ameliorate the stacking orientation of perovskite quantum dots.

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Ligand‐Pinning Induced Size Modulation of CsPbI₃ Perovskite Quantum Dots for Red Light‐Emitting Diodes

Qi,

Mei,

Wang

et al. 2024

Adv Funct Materials

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Perovskite quantum dots (PQDs) show high potential for new‐generation light‐emitting diodes (LEDs) due to their outstanding optoelectronic properties. Even though the red PQD‐LEDs can be realized through mixing halide in the PQDs to tune their spectroscopies, the PQDs may suffer from phase separation under a high electric field, predominantly affecting LED applications. Herein, a ligand‐pinning‐assisted approach is reported to tune the spectroscopies of CsPbI3 PQDs, in which vinyl phosphonic acid (VPA) is applied as function ligands to regulate the nucleation and growth of PQDs during the synthesis. Systematically experimental studies and theoretical calculations are conducted to comprehensively understand the functions of the VPA ligands during the PQD synthesis, which reveals that the VPA ligands with high binding energy with Pb2+ cations could firmly anchor on the surface matrix of PQDs without desorption, regulating the growth of PQDs and thus resulting in tunable spectroscopies being realized. Meanwhile, VPA could also renovate the defective surface matrix of PQDs, substantially diminishing trap‐induced nonradiative recombination. Consequently, red PQD‐LEDs deliver a high external quantum efficiency of 22.83%, which is significantly improved compared with the control devices. This work provides a new avenue to tune the spectroscopies of PQDs toward high‐performing LEDs.

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Ligand‐Pinning Induced Size Modulation of CsPbI₃ Perovskite Quantum Dots for Red Light‐Emitting Diodes

Qi,

Mei,

Wang

et al. 2024

Adv Funct Materials

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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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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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Synergistic effects of the physical modification and chemical passivation enabling efficient perovskite solar cells

Zhang,

Zhou,

Qiu

et al. 2024

Chemical Engineering Journal

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Renovating the surface matrix of FAPbl₃ perovskite quantum dots via phase-transfer catalysis for 16.29% efficiency solar cells

Abstract: A feasible surface matrix renovation strategy is reported, which could not only substantially eliminate surface vacancies but also predominantly ameliorate the stacking orientation of perovskite quantum dots.

Cited by 5 publications

References 59 publications

Ligand‐Pinning Induced Size Modulation of CsPbI₃ Perovskite Quantum Dots for Red Light‐Emitting Diodes

Ligand‐Pinning Induced Size Modulation of CsPbI₃ Perovskite Quantum Dots for Red Light‐Emitting Diodes

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

Synergistic effects of the physical modification and chemical passivation enabling efficient perovskite solar cells

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Renovating the surface matrix of FAPbl3 perovskite quantum dots via phase-transfer catalysis for 16.29% efficiency solar cells

Abstract: A feasible surface matrix renovation strategy is reported, which could not only substantially eliminate surface vacancies but also predominantly ameliorate the stacking orientation of perovskite quantum dots.

Cited by 5 publications

References 59 publications

Ligand‐Pinning Induced Size Modulation of CsPbI3 Perovskite Quantum Dots for Red Light‐Emitting Diodes

Ligand‐Pinning Induced Size Modulation of CsPbI3 Perovskite Quantum Dots for Red Light‐Emitting Diodes

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

Synergistic effects of the physical modification and chemical passivation enabling efficient perovskite solar cells

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Product

Resources

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Renovating the surface matrix of FAPbl₃ perovskite quantum dots via phase-transfer catalysis for 16.29% efficiency solar cells

Ligand‐Pinning Induced Size Modulation of CsPbI₃ Perovskite Quantum Dots for Red Light‐Emitting Diodes

Ligand‐Pinning Induced Size Modulation of CsPbI₃ Perovskite Quantum Dots for Red Light‐Emitting Diodes