Polyacrylonitrile‐Coordinated Perovskite Solar Cell with Open‐Circuit Voltage Exceeding 1.23 V

Chen, Chen; Wang, Xiao; Li, Zhipeng; Du, Xiaofan; Shao, Zhipeng; Sun, Xiuhong; Liu, Dachang; Chien, Gao; Hao, Lianzheng; Zhao, Qiangqiang; Zhang, Bingqian; Cui, Guanglei; Pang, Shuping

doi:10.1002/anie.202113932

Cited by 71 publications

(34 citation statements)

References 37 publications

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“…5d to investigate the charge recombination behavior in the PSCs. It is clear that M-P3HT-based devices exhibit higher V OC values than the devices based on P3HT and R-P3HT, indicative of less recombination during the photovoltaic process 48,49 . Moreover, the smaller linear slope of PSC with M-P3HT (1.32 kT q −1 ) than that with R-P3HT (1.61 kT q −1 ) and P3HT (1.73 kT q −1 ) further verified this argument.…”

Section: Defect Passivation and Stabilitymentioning

confidence: 98%

Constructing molecular bridge for high-efficiency and stable perovskite solar cells based on P3HT

Gong

Jiang

et al. 2022

Nat Commun

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Poly (3-hexylthiophene) (P3HT) is one of the most attractive hole transport materials (HTMs) for the pursuit of stable, low-cost, and high-efficiency perovskite solar cells (PSCs). However, the poor contact and the severe recombination at P3HT/perovskite interface lead to a low power conversion efficiency (PCE). Thus, we construct a molecular bridge, 2-((7-(4-(bis(4-methoxyphenyl)amino)phenyl)−10-(2-(2-ethoxyethoxy)ethyl)−10H-phenoxazin-3-yl)methylene)malononitrile (MDN), whose malononitrile group can anchor the perovskite surface while the triphenylamine group can form π−π stacking with P3HT, to form a charge transport channel. In addition, MDN is also found effectively passivate the defects and reduce the recombination to a large extent. Finally, a PCE of 22.87% has been achieved with MDN-doped P3HT (M-P3HT) as HTM, much higher than the efficiency of PSCs with pristine P3HT. Furthermore, MDN gives the un-encapsulated device enhanced long-term stability that 92% of its initial efficiency maintain even after two months of aging at 75% relative humidity (RH) follow by one month of aging at 85% RH in the atmosphere, and the PCE does not change after operating at the maximum power point (MPP) under 1 sun illumination (~45 oC in N2) over 500 hours.

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Section: Defect Passivation and Stabilitymentioning

confidence: 98%

Constructing molecular bridge for high-efficiency and stable perovskite solar cells based on P3HT

Gong

Jiang

et al. 2022

Nat Commun

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“…24 Its strong electronwithdrawing ability is beneficial for charge delocalization, and the -CN group can efficiently passivate perovskite. 26 The conjugated SAMs exhibited considerably enhanced intrinsic stabilities, which have been comprehensively verified by UV− vis absorption, cyclic voltammetry (CV), and proton based nuclear magnetic resonance measurements ( 1 H NMR). We also studied the structure−performance relationship and found that the methoxy-substituted triphenylamine group showed superior hole-extracting ability, along with improved selfassembly behavior of SAMs through extension of conjugation.…”

mentioning

confidence: 83%

“…Specifically, we choose cyanoacetic acid (CA) as the anchoring group, which has been widely used in dye-sensitized solar cells and successfully applied in PSCs . Its strong electron-withdrawing ability is beneficial for charge delocalization, and the -CN group can efficiently passivate perovskite . The conjugated SAMs exhibited considerably enhanced intrinsic stabilities, which have been comprehensively verified by UV–vis absorption, cyclic voltammetry (CV), and proton based nuclear magnetic resonance measurements ( 1 H NMR).…”

mentioning

confidence: 99%

Conjugated Self-Assembled Monolayer as Stable Hole-Selective Contact for Inverted Perovskite Solar Cells

Zhang

et al. 2022

ACS Materials Lett.

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The alkyl linker-based self-assembled monolayer (SAM) has emerged as an efficient hole-selective contact (HSC) for inverted perovskite solar cells (PSCs). Despite being effective in hole-extraction and interfacial passivation, its hole-transporting capability is limited by the insulating alkyl linker, along with poor stability due to the isolated and nonconjugated electron-rich moiety. Here, we report a series of conjugated SAMs that exhibit excellent photo-and electrical stabilities. The conjugated molecular structure not only enhances charge transport but also stabilizes the electron-rich arylamines through electron/charge delocalization. Moreover, it enables convenient modulation of frontier orbital energy levels for interfacial band alignment. By scrutinization of the conjugation-linker and hole-transporting head, an optimal conjugated SAM (MPA-Ph-CA) in combination with the standard triple cation perovskite Cs 0.05 (FA 0.92 MA 0.08 ) 0.95 Pb(I 0.92 Br 0.08 ) 3 achieved an efficient inverted PSC with a power conversion efficiency (PCE) of 22.53% (certified 22.12%). Moreover, the MPA-Ph-CA based devices showed excellent stability, retaining over 95% of their initial PCEs under one sun constant irradiation for 800 h. The synchronously enhanced efficiency and stability suggest that conjugated SAM-based HSCs are promising for further advancing inverted PSCs.

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“…5d to investigate the charge recombination behavior in the PSCs. It is clear that M-P3HT based devices exhibit higher V OC values than the devices based on P3HT and R-P3HT, indicative of the less recombination during the photovoltaic process 41,42 .…”

Section: Defect Passivation and Stabilitymentioning

confidence: 98%

Constructing Molecular Bridge for High-Efficiency and Stable Perovskite Solar Cells based on P3HT Hole Transport Material

Gong

Jiang

et al. 2022

Preprint

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Poly (3-hexylthiophene) (P3HT) is one of the most attracting hole transport materials (HTMs) for the pursuing of stable, low-cost and high-efficiency perovskite solar cells (PSCs). However, the poor contact and the severe recombination at P3HT/perovskite interface lead to a low power conversion efficiency (PCE). Thus, we have constructed a molecular bridge, MDN, whose malononitrile group can anchor the perovskite surface while triphenylamine group can form π − π stacking with P3HT, to form a charge transport channel. In addition, MDN was also found effectively passivate the defects and reduce the recombination to a large extent. Finally, a PCE of 22.87% has been achieved with MDN doped P3HT (M-P3HT) as HTM, much higher than the efficiency of PSCs with pristine P3HT. Furthermore, MDN gave the un-encapsulated device an enhanced long-term stability that 92% of its initial efficiency has been maintained even after two months of aging at 75% relative humidity (RH) followed by one month of aging at 85% RH in the atmosphere, and the PCE has not been changed after operating at the maximum power point (MPP) under 1 sun illumination (~ 45 oC in N2) over 500 hours.

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Polyacrylonitrile‐Coordinated Perovskite Solar Cell with Open‐Circuit Voltage Exceeding 1.23 V

Cited by 71 publications

References 37 publications

Constructing molecular bridge for high-efficiency and stable perovskite solar cells based on P3HT

Constructing molecular bridge for high-efficiency and stable perovskite solar cells based on P3HT

Conjugated Self-Assembled Monolayer as Stable Hole-Selective Contact for Inverted Perovskite Solar Cells

Constructing Molecular Bridge for High-Efficiency and Stable Perovskite Solar Cells based on P3HT Hole Transport Material

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