An ammonium-pseudohalide ion pair for synergistic passivating surfaces in FAPbI3 perovskite solar cells

Wang, Jungan; Ma, Hongzhuang; Wang, Aifei; Li, Zihao; Dong, Jingjin; Li, You; Gao, Song; Yan, Suhao; Chen, Xianglin; Li, Ya; Wu, Zichao; Xu, Wenxin; Liu, Fang; Wang, Fangfang; Huang, Wei; Qin, Tianshi

doi:10.1016/j.matt.2022.04.006

Cited by 32 publications

(22 citation statements)

References 42 publications

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“…1e), which shifted to 9.60 ppm when blended with PbI 2 , suggesting the strong NH⋯I hydrogen-bonding or NH 2 + ⋯I − ionic bonding interactions. 31 There was also a shift for the protons of –CH– in the pyrimidine ring, confirming the existence of coordination interaction between Pb 2+ and pyrimidine N in APC. A similar conclusion was obtained from UV-vis absorption spectra.…”

Section: Resultsmentioning

confidence: 68%

Stable perovskite solar cells with 25.17% efficiency enabled by improving crystallization and passivating defects synergistically

Wang

Chen

et al. 2022

Energy Environ. Sci.

100

102

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Section: Resultsmentioning

confidence: 68%

Stable perovskite solar cells with 25.17% efficiency enabled by improving crystallization and passivating defects synergistically

Wang

Chen

et al. 2022

Energy Environ. Sci.

100

102

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“…The signal of –CH– nearby pyridine N + in SPHI also exhibited a similar shift, suggesting electrostatic interaction between pyridine N + and I − . 39 UV-vis absorption spectra were collected to study the interaction between SPHI and the perovskite precursor. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Over 25% efficiency and stable bromine-free RbCsFAMA-based quadruple cation perovskite solar cells enabled by an aromatic zwitterion

et al. 2023

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“…To pinpoint the presence and interfacial distribution of SPA molecules throughout the whole device, time‐of‐flight secondary‐ion mass spectrometry (TOF‐SIMS) characterization was conducted to track the depth profiles of the atomic species. [ 22,23 ] As shown in Figure S2, Supporting Information, TOF‐SIMS in the positive ion model was employed to figure out different layers by distinguishing feature elements. The signal corresponding to CsAu+ originates from the metal electrode, the Cs2C2+ signal represents the HTL, the signal for CsPb+ is attributed to the perovskite layer, the signal for CsTi+ is derived from ETL, and the CsSn+ signal belongs to the FTO substrate.…”

Section: Resultsmentioning

confidence: 99%

Pushing the Limit of Open‐Circuit Voltage Deficit via Modifying Buried Interface in CsPbI₃ Perovskite Solar Cells

Zhang

Fan

et al. 2022

Advanced Materials

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harmful phase separation behavior, which makes it the most prominent candidate for high-efficiency single-junction cells or sub-cell absorbers in tandem cells. [1,2] It has witnessed tremendous progress in inorganic CsPbI 3 -based perovskite solar cells (PSCs) under unremitting efforts over the past few years, especially on stabilizing photo-active black phase and improving perovskite crystal quality. [3][4][5] However, the power conversion efficiency (PCE) of CsPbI 3 -based PSCs still remains inferior to that of organic-inorganic hybrid PSCs, primarily due to the serious photovoltage loss triggered by nonradiative charge carrier recombination. [5][6][7] Suffering from severe photovoltage loss, the open-circuit voltage (V OC ) reaches only 80% of the Shockley-Queisser (S-Q) theoretical limit, critically impeding further advancements in performance. [8][9][10] In this regard, reducing the V OC deficit is of great significance for promoting the efficiency of CsPbI 3 -based photovoltaics.Several approaches including additivesassisted crystallization techniques, post-treatment strategies, and antisolvent engineering methods have been developed to suppress the V OC deficit in CsPbI 3 -based solar cells. [11] Thereinto, additives engineering such as introducing inorganic ammonium halides, alien elements, and molten salts into the precursor solution has been proven to be an effective means through manipulating crystallization growth and enhancing perovskite crystallinity. [1,3,12] Alternatively, post-treatment on perovskite surfaces with 2D materials or methylammonium chloride has seen aroused interest to demonstrate some advantages in reducing V OC loss. [8,13] Moreover, employing solvent molecular sieves in the antisolvent induced rapid nucleation and slow crystal growth of CsPbI 3 films, thereby diminishing energy loss in photovoltaic devices. [5] Nevertheless, most strategies concentrated on the bulk or the top surfaces of CsPbI 3 perovskite. Little attention has been paid to tackling the bottleneck issues of the buried interface under CsPbI 3 perovskite thin films, resulting in a huge room to restrain the V OC deficit.Generally, the perovskite layer is clamped by the atop hole electron layer (HTL) and the bottom titanium oxide (TiO 2 ) electron transport layer (ETL) in a typical regular CsPbI 3 -based PSCs structure. The buried interface between TiO 2 ETL and perovskite possesses higher concentrations of imperfections than that of Although CsPbI 3 perovskites have shown tremendous potential in the photovoltaic field owing to their excellent thermal stability, the device performance is seriously restricted by severe photovoltage loss. The buried titanium oxide/perovskite interface plays a critical role in interfacial charge transport and perovskite crystallization, which is closely related to open-circuit voltage deficit stemming from nonradiative recombination. Herein, target molecules named 3-sulphonatopropyl acrylate potassium salts are deliberately employed with special functional groups for modifying the buried...

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An ammonium-pseudohalide ion pair for synergistic passivating surfaces in FAPbI3 perovskite solar cells

Cited by 32 publications

References 42 publications

Stable perovskite solar cells with 25.17% efficiency enabled by improving crystallization and passivating defects synergistically

Stable perovskite solar cells with 25.17% efficiency enabled by improving crystallization and passivating defects synergistically

Over 25% efficiency and stable bromine-free RbCsFAMA-based quadruple cation perovskite solar cells enabled by an aromatic zwitterion

Pushing the Limit of Open‐Circuit Voltage Deficit via Modifying Buried Interface in CsPbI₃ Perovskite Solar Cells

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An ammonium-pseudohalide ion pair for synergistic passivating surfaces in FAPbI3 perovskite solar cells

Cited by 32 publications

References 42 publications

Stable perovskite solar cells with 25.17% efficiency enabled by improving crystallization and passivating defects synergistically

Stable perovskite solar cells with 25.17% efficiency enabled by improving crystallization and passivating defects synergistically

Over 25% efficiency and stable bromine-free RbCsFAMA-based quadruple cation perovskite solar cells enabled by an aromatic zwitterion

Pushing the Limit of Open‐Circuit Voltage Deficit via Modifying Buried Interface in CsPbI3 Perovskite Solar Cells

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Pushing the Limit of Open‐Circuit Voltage Deficit via Modifying Buried Interface in CsPbI₃ Perovskite Solar Cells