Toward high-efficiency and thermally-stable perovskite solar cells: A novel metal-organic framework with active pyridyl sites replacing 4-tert-butylpyridine

Zhou, Xuesong; Qiu, Lele; Fan, Rongwei; Ye, Haoxin; Tian, Changhao; Hao, Sue

doi:10.1016/j.jpowsour.2020.228556

Cited by 17 publications

(16 citation statements)

References 48 publications

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“…[ 10,18 ] Surprisingly, by adding an optimal amount of Er@C 82 (0.09 mg mL −1 ) into the control Spiro‐Li film, the pinholes in the resultant Spiro‐Li‐Er film are obviously reduced (Figure 2b) and the root‐mean‐square (RMS) roughness of the corresponding film is also decreased to 3.358 nm from 4.926 nm for the Spiro‐Li film. These observations imply that the addition of Er@C 82 has effectively suppressed the aggregation of Li‐TFSI, [ 16,30 ] leading to a uniform distribution of Li‐TFSI in the Spiro‐Li‐Er film. Since the Li‐TFSI dopant is responsible for facilitating the oxidation reaction between Spiro‐OMeTAD and O 2 , according to the following equation [ 12 ]

S {piro‐OMeTAD + O}_{2} + Li‐TFSI \to {Spiro‐OMeTAD}^{+} {TFSI}^{-} + {Li}_{x} {normalO}_{y}

the more uniformly dispersed Li‐TFSI in the Spiro‐Li‐Er film is believed to come in contact with both Spiro‐OMeTAD and O 2 more easily than that in the Spiro‐Li film, consequently accelerating the oxidation reaction.…”

Section: Resultsmentioning

confidence: 97%

Er@C₈₂ as a Bifunctional Additive to the Spiro‐OMeTAD Hole Transport Layer for Improving Performance and Stability of Perovskite Solar Cells

Shen

et al. 2021

Solar RRL

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Perovskite solar cells (PSCs) based on 2,2′,7,7′‐tetrakis‐(N,N‐di‐p‐methoxyphenylamino)‐9,9′‐spirobifluorene Spiro‐OMeTAD hole transport layer (HTL) have achieved a huge success in power conversion efficiency (PCE), but the required lithium bis(trifluoromethanesulfonyl)imide (Li‐TFSI) dopant in Spiro‐OMeTAD HTL is hygroscopic, not only impairing the charge transport but also inducing the instability of PSCs. Herein, Er@C82, which consists of a hydrophobic fullerene cage encapsulating an Er3+ ion, is first introduced as a novel additive to modify the Li‐TFSI‐based Spiro‐OMeTAD HTL. By adding a tiny amount of Er@C82 (0.09 mg mL−1) in the Spiro‐OMeTAD HTL, the PSC exhibits an efficiency promotion from 17.53% to 19.22%. The PCE enhancement is mainly attributed to the improved film quality of HTL after adding Er@C82, which promotes the oxidation of Spiro‐OMeTAD, resulting in faster hole transport and less charge recombination. Simultaneously, the hydrophobic Er@C82 and the improved film quality of HTL lead to a dramatically enhanced stability of PSCs. Accordingly, the Er@C82‐modified devices can maintain over 70% and 80% of the initial efficiencies after exposure in air for 400 h and in an Ar atmosphere for 2000 h, respectively. Therefore, this bifunctional Er@C82 additive provides a promising pathway for fabricating highly efficient and stable PSCs.

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S {piro‐OMeTAD + O}_{2} + Li‐TFSI \to {Spiro‐OMeTAD}^{+} {TFSI}^{-} + {Li}_{x} {normalO}_{y}

Section: Resultsmentioning

confidence: 97%

Er@C₈₂ as a Bifunctional Additive to the Spiro‐OMeTAD Hole Transport Layer for Improving Performance and Stability of Perovskite Solar Cells

Shen

et al. 2021

Solar RRL

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“…[ 124 ] Zhou et al . [ 125 ] improved the thermal stability of PSCs by replacing the 4‐ tert ‐butylpyridine ( t ‐BP) with the [In(HPyia)Cl 2 ]CH 3 CN (In‐Pyia) in Figure 11g. Due to their strong coordination effect and robust framework, the In‐Pyia effectively restrained the aggregation, hydration, and ion penetration behaviors of lithium salts.…”

Section: Main Applications Of Mofsmentioning

confidence: 99%

“…Schematic illustration of (a) Li‐TFSI@NH 2 ‐MIL‐101, [ 122 ] (c) POM@MOF‐545, [ 123 ] (e) Zn‐CBOB, [ 124 ] and (g)In‐Pyia. [ 125 ] Long‐term stability for PSCs with (b) Li‐TFSI@NH 2 ‐MIL‐101, (d) POM@MOF‐545, (f) Zn‐CBOB, and (h) In‐Pyia.…”

Section: Main Applications Of Mofsmentioning

confidence: 99%

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MOFs in Emerging Solar Cells

Dou

Chen

2023

Chin. J. Chem.

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Comprehensive Summary Metal‐organic framework (MOF) materials have attracted intense scientific interest in the solar cell research community owing to their unique physiochemical properties and various preparation methods. The photovoltaic performance and stability of resultant optoelectronic devices can also be improved by adopting MOF materials. This review pays close attention to the summary and generalization of recent representative achievements in solar cells by utilizing MOFs, including dye‐sensitized solar cells, perovskite solar cells, organic solar cells, and so on. This mini‐review is expected to improve understanding of material properties and broaden the scope of future material applications.

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“…This result can be promising in terms of highly efficient and long-term stable PSC devices. A further step toward more stable PSCs was made by the same group through the replacement of TBP with a different In-based MOF, namely In(HPyia)Cl 2 ]•CH 3 CN (In-Pyia) [233]. As a matter of fact, TBP, which is highly volatile liquid phase component, caused the aggregation, hydration, and ion penetration of lithium salts into the PSK layer.…”

Section: Rolementioning

confidence: 99%

Application of Metal-Organic Frameworks and Covalent Organic Frameworks as (Photo)Active Material in Hybrid Photovoltaic Technologies

et al. 2020

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Metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) are two innovative classes of porous coordination polymers. MOFs are three-dimensional materials made up of secondary building blocks comprised of metal ions/clusters and organic ligands whereas COFs are 2D or 3D highly porous organic solids made up by light elements (i.e., H, B, C, N, O). Both MOFs and COFs, being highly conjugated scaffolds, are very promising as photoactive materials for applications in photocatalysis and artificial photosynthesis because of their tunable electronic properties, high surface area, remarkable light and thermal stability, easy and relative low-cost synthesis, and structural versatility. These properties make them perfectly suitable for photovoltaic application: throughout this review, we summarize recent advances in the employment of both MOFs and COFs in emerging photovoltaics, namely dye-sensitized solar cells (DSSCs) organic photovoltaic (OPV) and perovskite solar cells (PSCs). MOFs are successfully implemented in DSSCs as photoanodic material or solid-state sensitizers and in PSCs mainly as hole or electron transporting materials. An innovative paradigm, in which the porous conductive polymer acts as standing-alone sensitized photoanode, is exploited too. Conversely, COFs are mostly implemented as photoactive material or as hole transporting material in PSCs.

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Toward high-efficiency and thermally-stable perovskite solar cells: A novel metal-organic framework with active pyridyl sites replacing 4-tert-butylpyridine

Cited by 17 publications

References 48 publications

Er@C₈₂ as a Bifunctional Additive to the Spiro‐OMeTAD Hole Transport Layer for Improving Performance and Stability of Perovskite Solar Cells

Er@C₈₂ as a Bifunctional Additive to the Spiro‐OMeTAD Hole Transport Layer for Improving Performance and Stability of Perovskite Solar Cells

MOFs in Emerging Solar Cells

Application of Metal-Organic Frameworks and Covalent Organic Frameworks as (Photo)Active Material in Hybrid Photovoltaic Technologies

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Toward high-efficiency and thermally-stable perovskite solar cells: A novel metal-organic framework with active pyridyl sites replacing 4-tert-butylpyridine

Cited by 17 publications

References 48 publications

Er@C82 as a Bifunctional Additive to the Spiro‐OMeTAD Hole Transport Layer for Improving Performance and Stability of Perovskite Solar Cells

Er@C82 as a Bifunctional Additive to the Spiro‐OMeTAD Hole Transport Layer for Improving Performance and Stability of Perovskite Solar Cells

MOFs in Emerging Solar Cells

Application of Metal-Organic Frameworks and Covalent Organic Frameworks as (Photo)Active Material in Hybrid Photovoltaic Technologies

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Er@C₈₂ as a Bifunctional Additive to the Spiro‐OMeTAD Hole Transport Layer for Improving Performance and Stability of Perovskite Solar Cells

Er@C₈₂ as a Bifunctional Additive to the Spiro‐OMeTAD Hole Transport Layer for Improving Performance and Stability of Perovskite Solar Cells