Xudong Lv

State Key Laboratory of Applied Organic Chemistry

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Jing Cao

State Key Laboratory of Applied Organic Chemistry

Xiaoxia Feng

Northwest Normal University

Yu Tang

State Key Laboratory of Applied Organic Chemistry

Yuhong Cui

Shenyang Sport University

Zheng‐Qian Liu

Huazhong University of Science and Technology

Sui-Qin Yang

Huazhong University of Science and Technology

Congping Li

Sun Yat-sen University

Ruiqian Meng

Westlake University

Wei-Jun Xue

Zhejiang Ocean University

Ruihao Chen

Northwestern Polytechnical University

Cooperative Institutions

Lanzhou University

State Key Laboratory of Applied Organic Chemistry

Huazhong University of Science and Technology

Chinese Academy of Sciences

Northwest Normal University

Xiamen University

Peking University

Collaborative Innovation Center of Chemistry for Energy Materials

Xiamen University of Technology

Lanzhou City University

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Tetra‐ammonium Zinc Phthalocyanine to Construct a Graded 2D–3D Perovskite Interface for Efficient and Stable Solar Cells

Chinese Journal of Chemistry (2018)

Congping Li Xudong Lv Jing Cao Yu Tang

Summary of main observation and conclusion The crystallographic defects inevitably incur during the solution processed organic‐inorganic hybrid perovskite film, especially at surface and the grain boundaries (GBs) of perovskite film, which can further result in the reduced cell performance and stability of perovskite solar cells (PSCs). Here, a simple defect passivation method was employed by treating perovskite precursor film with a hydrophobic tetra‐ammonium zinc phthalocyanine (ZnPc). The results demonstrated that a 2D‐3D graded perovskite interface with a capping layer of 2D (ZnPc) 0.5 MA n − 1 Pb n I 3 n + 1 perovskite together with 3D MAPbI 3 perovskite was successfully constructed on the top of 3D perovskite layer. This situation realized the efficient GBs passivation, thus reducing the defects in GBs. As expected, the corresponding PSCs with modified perovskite revealed an improved cell performance. The best efficiency reached 19.6%. Especially, the significantly enhanced long‐term stability of the responding PSCs against humidity and heating was remarkably achieved. Such a strategy in this work affords an efficient method to improve the stability of PSCs and thus probably brings the PSCs closer to practical commercialization.

Passivation

Perovskite solar cell

10.1002/cjoc.201800469

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Citations (18)

One-pot surface and buried interface manipulation of perovskite film for efficient solar cells

Cell Reports Physical Science (2023)

Xudong Lv Xingbang Gao Zefeng Yu Guo‐Bin Xiao Jing Cao

Reducing the defects located at the interfaces between the perovskite layer and charge transport layers is critical to improving the efficiency and stability of perovskite solar cells (PSCs). However, it is difficult to manipulate both interfaces simultaneously with synergistic beneficial effects. Here, we report a strategy of one-pot surface and buried interface manipulation of 3D perovskite films by introducing two diammonium Ni and Cu porphyrins. The Ni porphyrin (NiP) and Cu porphyrin (CuP) act as bulky cations to yield 2D perovskite layers at the top-buried interfaces of 3D perovskites. The porphyrin-based 2D perovskite layer facilitates charge transport significantly suppressing non-radiative recombination. The device based on CuP&NiP manipulation yields an improved efficiency of up to 24.2% along with long-term overall stability. This work provides an approach for one-pot surface and buried interface manipulation of perovskite films by functional porphyrins to improve the efficiency and stability of PSCs.

Interface (matter)

Active layer

10.1016/j.xcrp.2023.101376

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Citations (3)

Solvent-based separation and recycling of waste plastics: A review

Chemosphere (2018)

Yibo Zhao Xudong Lv Hong‐Gang Ni

Plastic Waste

Plastic pollution

Plastics industry

Environmentally Friendly

Supercritical fluid extraction

Environmental Pollution

10.1016/j.chemosphere.2018.06.095

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Citations (244)

Performance of Cu-cathode/Fe3+/peroxymonosulfate process on iohexol degradation

Journal of Hazardous Materials (2018)

Xudong Lv Sui-Qin Yang Wei-Jun Xue Yuhong Cui Zheng‐Qian Liu

Iohexol

Degradation

Inert

10.1016/j.jhazmat.2018.11.091

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Citations (41)

Monoammonium Porphyrin for Blade-Coating Stable Large-Area Perovskite Solar Cells with >18% Efficiency

Journal of the American Chemical Society (2019)

Congping Li Jun Yin Ruihao Chen Xudong Lv Xiaoxia Feng

Efficient control of crystallization and defects of perovskite films are the key factors toward the performance and stability of perovskite solar cells (PSCs), especially for the preparation of large-area PSCs devices. Herein, we directly embedded surfactant-like monoammonium zinc porphyrin (ZnP) compound into the methylammonium (MA+) lead iodide perovskite film to blade-coat large-area uniform perovskite films as large as 16 cm2. Efficiency as high as 18.3% for blade-coating large-area (1.96 cm2) PSCs with ZnP was unprecedentedly achieved, while the best efficiency of fabricated small-area (0.1 cm2) device was up to 20.5%. The detailed analyses demonstrated the functions of ZnP in crystallization control and defects passivation of perovskite surfaces and grain boundaries. As a consequence, the ZnP-encapsulated devices retained over 90% of its initial efficiency after 1000 h with a humidity of about 45% at 85 °C. This research presents a facile way to achieve the synergistic effect of large-area coating, morphology tailoring, and defect suppression based on the molecular encapsulation strategy for perovskite films, further improving the photovoltaic performance and stability of PSCs.

Passivation

10.1021/jacs.9b01305

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Citations (174)

Efficient Grain Boundary Suture by Low-Cost Tetra-ammonium Zinc Phthalocyanine for Stable Perovskite Solar Cells with Expanded Photoresponse

Journal of the American Chemical Society (2018)

Jing Cao Congping Li Xudong Lv Xiaoxia Feng Ruiqian Meng

Defects within the grain boundaries (GBs) of halide perovskite films make fabrication of efficient and stable perovskite solar cells (PSCs) highly challenging. Here, a low-cost tetra-ammonium zinc phthalocyanine (ZnPc) was used to post-treat the MAPbI3 (MA = CH3NH3) film. Two-dimensional (ZnPc)0.5MA n-1Pb nI3 n+1 was successfully constructed within the GBs of MAPbI3 film achieving a GBs suture for passivating the defects in GBs. Time-resolved photoluminescence showed that the modification increased the decay time from 44 to 57 ns indicating the passivation of GBs reduces trap-assisted recombination. The PSCs with modified perovskite exhibited increased photovoltage, and the best efficiency was improved up to 20.3%. More importantly, the long-term stability of the responding PSCs against humidity and heating was further improved unprecedentedly. Moreover, the modified MAPbI3 films revealed a self-repairing capability under mild heating. This work provided a novel insight into ongoing fabrication of efficient and stable PSCs by the efficient GBs suture with low-cost phthalocyanine.

Passivation

10.1021/jacs.8b07025

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Citations (112)

Synergistic Effect of Cathode/peroxymonosulfate/Fe3+ on Phenol Degradation

Electrochimica Acta (2017)

Yuhong Cui Xudong Lv Jing-Xia Lei Zheng‐Qian Liu

Degradation

10.1016/j.electacta.2017.05.067

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Citations (34)

Continuous Modification of Perovskite Film by a Eu Complex to Fabricate the Thermal and UV-Light-Stable Solar Cells

ACS Applied Materials & Interfaces (2022)

Xiaoxia Feng Xudong Lv Jing Cao Yu Tang

Perovskite solar cells (PSCs) with simple and low-cost processability have shown promising photovoltaic performances. However, internal defects, external UV light, and heat sensitivity are principal obstacles on their way toward commercialization. Herein, we prepare an Eu complex and directly dope it into the perovskite precursor as a UV filter to decrease the photodegradation of PSCs. The formation of hydrogen bonds between the organic cation of perovskite and the -CF3 in the Eu complex could restrain the escape of organic cations under heating. The Eu complex acts as a redox shuttle to reduce metallic lead (Pb0) and iodine (I0) defects when the PSCs have a long-time operation. Additionally, the ligand-containing aromatic rings could reduce the trace amount of I0 existing as electronic defects in perovskites and together with the long alkyl chain retard the moisture immersion into the PSCs. The best efficiency of PSCs modified by the Eu complex improves up to 20.9%. The excellent thermal stability and UV-light resistance are also realized. This strategy provides a method to design a passivator which continuously modifies the imperfections and inhibits the chemical chain reactions in perovskite film, thereby enhancing the performance and stability of PSCs.

UV filter

Thermal Stability

Photodegradation

10.1021/acsami.2c15880

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Citations (6)

Diammonium Porphyrin-Induced CsPbBr₃ Nanocrystals to Stabilize Perovskite Films for Efficient and Stable Solar Cells

ACS Applied Materials & Interfaces (2020)

Xiaoxia Feng Xudong Lv Qing Liang Jing Cao Yu Tang

Employing all-inorganic perovskite quantum dots (QDs) to treat organic-inorganic perovskite films has been well documented as a serviceable tactic to improve the performance of perovskite solar cells (PSCs). However, the inert molecule-coated QDs with zero-dimensional (0D) structure would limit further enhancement of the efficiency and stability of PSCs. Here, we employ a conductive diammonium porphyrin (ZnPy-NH3Br) to treat CsPbBr3 QDs coated on a three-dimensional perovskite film, thus constructing a stable 0D-two-dimensional perovskite capping layer. The generation of large-scale nanocube crystals by treating CsPbBr3 nanocrystallites with ZnPy-NH3Br in solution demonstrates such an assembly strategy. The formed capping layer can achieve efficient charge transport and separation. As a consequence, the best efficiency of an optimized device is up to 20.0%, which is superior to the control PSCs fabricated without modification (19.1%) and with pure CsPbBr3 QD modification (19.5%). More importantly, the porphyrin-treated CsPbBr3 QD-based devices retain over 65 or 85% of their initial efficiency when placed at 85 °C or 45% humidity tracking for 1000 h, respectively. Also, with the incorporation of QD-Por, the device retained 85% of the original efficiency when illuminated at AM 1.5 G for 450 h. Therefore, this work offered a facile avenue to modify perovskite films for fabricating highly efficient and stable PSCs.

10.1021/acsami.9b21348

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Citations (35)

Comparison of inert and non-inert cathode in cathode/Fe3+/Peroxymonosulfate processes on iohexol degradation

Chemosphere (2019)

Xudong Lv Yuhong Cui Wei-Jun Xue Sui-Qin Yang Jiaying Li

Inert

Hot cathode

10.1016/j.chemosphere.2019.02.079

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Citations (16)