Synergistic effect of amide and fluorine of polymers assist stable inverted perovskite solar cells with fill factor &gt; 83%

Luo, Ming; Zong, Xueping; Zhao, Mei; Sun, Zhe; Chen, Yu; Liang, Mao; Wu, Yongzhen; Xue, Song

doi:10.1016/j.cej.2022.136136

Cited by 32 publications

(33 citation statements)

References 41 publications

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“…This structure favored good solubility in conventional solvents such as chlorobenzene and toluene for HTMs. And an improved film forming property was achieved for the corresponding polymers . In addition, the introduced binaphthylamine core presented a reported C 2 -symmetric unit .…”

Section: Introductionmentioning

confidence: 94%

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A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI₃-Based Inverted Perovskite Solar Cells

Luo

Zong

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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Exploring polymeric hole-transporting materials (HTMs) with passivation functions represents a simplified and effective approach to minimize the perovskite defect density. To date, most of reported polymeric HTMs were applied to fabricate n-i-p regular perovskite solar cells (PSCs). The polymers compatible for p-i-n inverted PSCs were very limited. Moreover, the passivation polymers were devoted to passivate the uncoordinated Pb2+. However, the MA+ cation defect has profound unwanted effect on device efficiency and long-term stability. In order to synchronously passivate the Pb2+ and MA+ defects in p-i-n inverted PSCs, a new nonfused polymer was intentionally explored via mild polymerization. The aromatic bridge instead of long alkyl chains enabled polymer BN-12 to achieve excellent thermal stability and good wettability of perovskite precursor. Furthermore, the incorporation of chemical anchor sites (“CO” and “F”) strongly controlled the crystallization of perovskite and restrained the MA+ ion migration. As a result, a significant fill factor (FF) of 82.9% and an enhanced power conversion efficiency (PCE) of 20.28% were achieved for MAPbI3-based devices with the dopant-free BN-12, exceeding those with the commercial HTM PTAA (FF = 81.7%, PCE = 19.51%). More importantly, the unencapsulated devices based on BN-12 realized outstanding long-term stability, maintaining approximately 95% of its initial efficiency after stored for 85 days. By contrast, the PTAA-based device showed rapid decrease which retained only 50% of its initial value after 45 days.

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Section: Introductionmentioning

confidence: 94%

“…And an improved film forming property was achieved for the corresponding polymers. 41 In addition, the introduced binaphthylamine core presented a reported C 2 -symmetric unit. 42 Combining with the nonfully backbone of polymers, it helps to decrease the tendency to crystallize and bring out an improved stable amorphous film state.…”

Section: Introductionmentioning

confidence: 99%

A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI₃-Based Inverted Perovskite Solar Cells

Luo

Zong

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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“…For example, the uncoordinated Pb 2+ existing on the surface of the perovskite and grain boundaries (GBs) serve as nonradiative recombination centers, 6 which could trap the free-moving electrons and holes during the charge transporting process. 7,8 As a result, the short-circuit current density (J sc ), fill factor (FF), and/or open-circuit voltage (V oc ) could be decreased. 9,10 In addition, the GBs are able to evolve into a channel for water or oxygen to invade the perovskite layer and accelerate the decomposition of the perovskite film.…”

Section: ■ Introductionmentioning

confidence: 99%

Novel Two-Dimensional Graphdiyne-Derived Additive for Stable Inverted Perovskite Solar Cells

Luo

Lan

Zong

et al. 2023

ACS Sustainable Chem. Eng.

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The defects in perovskite films hinder the improvement of efficiency and long-term device stability of perovskite solar cells (PSCs). Antisolvent additive engineering has been widely applied to effectively reduce perovskite defects and improve the perovskite crystal quality. However, most of the traditional antisolvent-assisted organic additives endure the disadvantages of high volatility, instability, inflammability, high diffusion coefficient, and even toxicity, which hinder the device's stability for PSCs and raise serious environmental concerns. Herein, in this work, a novel two-dimensional tripolyindene hydrogen-substituted graphdiyne, denoted as DES-O-PHsGY, was synthesized through an easily accessible and biocompatible deep eutectic solvent. XPS measurement demonstrated that DES-O-PHsGY can passivate the lead defects in the perovskite layer. XRD and SEM results verified that DES-O-PHsGY can improve perovskite crystallization. After DES-O-PHsGY was applied as an antisolvent additive for MAPbI3based PSCs, the maximum open-circuit voltage of devices was increased from 1.079 V to 1.106 V, accompanied by a maximum power conversion efficiency of 20.51% surpassing that without the additive (19.51%). More importantly, the perovskite film with DES-O-PHsGY modification showed satisfactory thermal stability under an 80 °C continuous heating process. This work provides a novel method to prepare effective additives for perovskite defect passivation.

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“…Notably, defects can exist at the perovskite surface, grain boundaries and perovskite/ETL and HTL/perovskite interfaces, which cause severe non-radiative recombination (NRR) losses, affecting the open circuit voltage (V OC ) and fill factor (FF) and acting as a bottleneck for the PCE of inverted (p-i-n) PSCs. [16][17][18][19][20] The NRR sites are generated due to atomic restructuring, the perovskite thin-film surface, and interface deviations, i.e., ETL/ perovskite and perovskite/HTL. The V OC of inverted (p-i-n) PSCs compared to the Shockley-Queisser (S-Q) limit for single-junction solar cells 21 is considerably lower than that of the regular (n-i-p) PSCs.…”

Section: Introductionmentioning

confidence: 99%

High efficiency (>20%) and stable inverted perovskite solar cells: current progress and future challenges

et al. 2022

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Synergistic effect of amide and fluorine of polymers assist stable inverted perovskite solar cells with fill factor > 83%

Cited by 32 publications

References 41 publications

A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI₃-Based Inverted Perovskite Solar Cells

A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI₃-Based Inverted Perovskite Solar Cells

Novel Two-Dimensional Graphdiyne-Derived Additive for Stable Inverted Perovskite Solar Cells

High efficiency (>20%) and stable inverted perovskite solar cells: current progress and future challenges

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Synergistic effect of amide and fluorine of polymers assist stable inverted perovskite solar cells with fill factor > 83%

Cited by 32 publications

References 41 publications

A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI3-Based Inverted Perovskite Solar Cells

A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI3-Based Inverted Perovskite Solar Cells

Novel Two-Dimensional Graphdiyne-Derived Additive for Stable Inverted Perovskite Solar Cells

High efficiency (>20%) and stable inverted perovskite solar cells: current progress and future challenges

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A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI₃-Based Inverted Perovskite Solar Cells

A Multifunctional Fluorinated Polymer Enabling Efficient MAPbI₃-Based Inverted Perovskite Solar Cells