Carbon Quantum Dot-Passivated Perovskite/Carbon Electrodes for Stable Solar Cells

Tang, He-Bin; Xu, Tingting; Qin, Xiulan; Zhang, Kai; Lv, Shaoshen; Fan, J. C. C.; Huang, Tao; Chen, Lixin; Huang, Wei

doi:10.1021/acsanm.1c02850

Cited by 21 publications

(13 citation statements)

References 60 publications

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“…In addition, PSCs are suffering from significant non-radiative recombination losses originated from defect states of perovskites. Until now, numerous passivating strategies including solvent, composition, and interfacial engineering have been developed to enhance both efficiency and long-term stability. − Specially, the buried interface between the perovskite layer and the underlying transport layer has been vastly investigated to minimize trap states and recombination losses as well as facilitate carrier extraction. − For example, Dong et al and Gao et al have employed chlorobenzenesulfonic potassium salts and porous organic cages to passivate the buried tin oxide (SnO 2 )/perovskite interface, which results in better energy alignment, reduced trap states, and improved stability. , Similarly, Xu et al reported the successful use of daminozide as an interlayer to modify interface energetics and passivate defects at the interface as well as in perovskite bulk . Although high performance of PSCs has been achieved through the trap-state passivation, the mechanism is still complicated and excellent trap-state passivators are insufficient, which require further exploration and study.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Study of Group VA Monolayer Passivators for Perovskite Solar Cells

Allen

Kang

Wang

2023

ACS Appl. Nano Mater.

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With the increasing energy demands, the production of high-performance perovskite solar cells at economic cost is favorable. However, there are limitations to their commercial applications due to defect formation and instability. Passivation technologies help support their desirable traits. Recently, experiments have proven nanoscale group VA monolayers to be good passivator candidates. Simulated by these recent results, we applied density functional theory to systematically investigate the structural, electronic, optical, and mechanical properties of α and β phases of group VA monolayers, including phosphorene, arsenene, antimonene, and bismuthene in this project. The theoretical results reveal the following: (1) α-phosphorene and β-arsenene have ideal valence band maximum locations, while all monolayers have ideal conduction band minimum locations for enhancing open-circuit potential; (2) most monolayers have light effective masses for improving short-circuit current densities; (3) the location of passivators is important due to their high absorption coefficients; and (4) α-arsenene, α-bismuthene, and α-antimonene are ductile, which can potentially be used in flexible solar cells. Overall, theoretical insights suggest that α-phosphorene and both α- and β-arsenene are promising passivators with the consideration of all the electronic, optical, and mechanical properties.

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Section: Introductionmentioning

confidence: 99%

First-Principles Study of Group VA Monolayer Passivators for Perovskite Solar Cells

Allen

Kang

Wang

2023

ACS Appl. Nano Mater.

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“…Yang et al found that passivation with strong interaction energy promotes effective defect passivation, and inhibits defect migration as well . A surface passivation agent not only can passivate surface defects of perovskite, it can also be applied as an interfacial modifier to reduce energy level mismatching between perovskite and the carbon electrode. , Our group previously reported a 2-amino-5-(trifluoromethyl)pyridine (5-TFMAP) passivation agent with bidentate groups to passivate the perovskite CH 3 NH 3 PbI 3 films . The two anchoring sites of a NH 2 group and a pyridine ring provided strong interaction with the undercoordinated Pb 2+ , efficiently reducing the defect states of perovskite films, promoting better carrier transport and inhibiting nonradiative recombination.…”

mentioning

confidence: 99%

Pyridine Derivatives’ Surface Passivation Enables Efficient and Stable Carbon-Based Perovskite Solar Cells

Zhang

Fan

et al. 2022

ACS Materials Lett.

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Surface passivation has been demonstrated to be an effective strategy to reduce defects of hybrid halide perovskite films for making efficient and stable perovskite solar cells (PSCs). Especially the strong interaction between the passivation agents and the perovskite films is favorable for achieving a durable passivation effect. Pyridine derivatives with bidentate anchoring groups can interact with the uncoordinated Pb 2+ and minimize perovskite defects. Herein, in order to rationally design bidentate passivation agents, the passivation effects of pyridine (Py) and its derivatives (Py-X) with different functional groups of amino, carboxyl acid, and aldehyde are compared in carbon-based perovskite solar cells (C-PSCs) for the first time. Py-NH 2 is found to passivate the perovskite CH 3 NH 3 PbI 3 film the best among all the passivation agents. The N atoms on both the pyridine ring and the amino group with lone pair electrons can combine with the uncoordinated Pb 2+ , effectively reducing the defect density in the Py-NH 2 -treated perovskite film. First-principles density functional theory (DFT) calculations reveal that the strong interaction between Py-NH 2 and CH 3 NH 3 PbI 3 strengthens Pb−I bond and hinders the formation of I vacancies. Carbon-based perovskite solar cells (C-PSCs) passivated by Py-NH 2 achieve a champion power conversion efficiency (PCE) of 14.75%, compared to 11.55% of the control device. The Py-NH 2 passivated C-PSCs also exhibit good long-term stability, retaining more than 90% of the initial efficiency after 30 days of storage in air with 35−45% relative humidity.

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“…Furthermore, CQD‐based C–PSCs retain more than 80% of their initial PCE under testing conditions of 35% humidity and 840 h of storage. [ 181 ] Figure 10 summarizes the fabrication procedure and shows transmission electron microscopy (TEM) and high‐resolution transmission electron microscopy images of A‐CQDs and the J–V characteristics.…”

Section: Carbonaceous Materials Applied To C–pscsmentioning

confidence: 99%

Advances in Carbon Materials Applied to Carbon‐Based Perovskite Solar Cells

et al. 2023

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Perovskite‐based solar cells (PSCs) are some of the most promising devices for capturing photovoltaic energy. Efficiency has increased from single digits to a certified 25.7%, an unprecedented improvement for any solar cell technology. Incorporating carbon materials into perovskite solar cells promises to be revolutionary in the solar cell field by increasing stability, decreasing manufacturing costs, and making them attractive for commercialization. Here, an overview of the advances in carbon‐based perovskite solar cells (C–PSCs) that incorporate different carbon materials as back contact on different device architectures is presented. An overview of PSC architectures and high‐ and low‐temperature C–PSCs is provided. Additionally, recent advances in the main carbon materials applied in the field, such as graphene, carbon nanotubes, carbon dots, and biocarbon, are presented. Finally, a summary of carbon materials applied to C–PSCs is provided.

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Carbon Quantum Dot-Passivated Perovskite/Carbon Electrodes for Stable Solar Cells

Cited by 21 publications

References 60 publications

First-Principles Study of Group VA Monolayer Passivators for Perovskite Solar Cells

First-Principles Study of Group VA Monolayer Passivators for Perovskite Solar Cells

Pyridine Derivatives’ Surface Passivation Enables Efficient and Stable Carbon-Based Perovskite Solar Cells

Advances in Carbon Materials Applied to Carbon‐Based Perovskite Solar Cells

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