Rationalization of passivation strategies toward high-performance perovskite solar cells

Chemical Society Reviews, Год журнала: 2022, Номер 52(1), С. 163 - 195

Опубликована: Дек. 1, 2022

Lead halide perovskite solar cells (PSCs) have shown unprecedented development in efficiency and progressed relentlessly improving stability. All the achievements been accompanied by diverse passivation strategies to circumvent pervasive defects materials, which play crucial roles process of charge recombination, ion migration, component degradation. Among tremendous efforts made solve these issues achieve high-performance PSCs, we classify review both well-established burgeoning provide further guidance for protocols including chemical eliminate formation bonds, physical strain relaxation or treatments, energetic improve stability toward light oxygen, field-effect regulate interfacial carrier behavior. The subtle but non-trivial consequences from various need advanced characterization techniques combining synchrotron-based X-ray analysis, capacitance-based measurements, spatially resolved imaging, fluorescent molecular probe, Kelvin probe force microscope, etc., scrutinize mechanisms. In end, challenges prospective research directions on advancing are proposed. Judicious combinations among chemical, physical, energetic, deserve more attention future high-efficiency stable photovoltaics.

Язык: Английский

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Tailoring passivators for highly efficient and stable perovskite solar cells

Nature Reviews Chemistry, Год журнала: 2023, Номер 7(9), С. 632 - 652

Опубликована: Июль 18, 2023

Язык: Английский

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25.24%‐Efficiency FACsPbI₃ Perovskite Solar Cells Enabled by Intermolecular Esterification Reaction of DL‐Carnitine Hydrochloride

Advanced Materials, Год журнала: 2023, Номер 35(16)

Опубликована: Фев. 2, 2023

Judicious tailoring of the interface between SnO2 electron-transport layer and perovskite buried surface plays a pivotal role in obtaining highly efficient stable solar cells (PSCs). Herein, DL-carnitine hydrochloride (DL) is incorporated into perovskite/SnO2 to suppress defect-states density. A DL-dimer obtained at by an intermolecular esterification reaction. For film, Cl- can passivate oxygen vacancies (VO ) through electrostatic coupling, while N coordinate with Sn4+ Sn-related defects. FA+ defects via hydrogen bonding Pb-related more efficiently than DL monomer. Upon modification, interfacial are effectively passivated quality resultant film improved. As result, DL-treated device achieves gratifying open-circuit voltage (VOC 1.20 V champion power conversion efficiency (PCE) 25.24%, which record value among all reported FACsPbI3 PSCs date. In addition, unencapsulated devices exhibit charming stability, sustaining 99.20% 90.00% their initial PCEs after aging air for 1200 h continuously operating maximum point tracking 500 h, respectively.

Язык: Английский

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Multifunctional Small Molecule as Buried Interface Passivator for Efficient Planar Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2023, Номер 33(22)

Опубликована: Март 2, 2023

Abstract The improvement of power conversion efficiency (PCE) and stability the perovskite solar cell (PSC) is hindered by carrier recombination originating from defects at buried interface PSC. It crucial to suppress nonradiative facilitate transfer in PSC via engineering. Herein, P‐biguanylbenzoic acid hydrochloride (PBGH) developed modify tin oxide (SnO 2 )/perovskite interface. effects PBGH on transportation, growth, defect passivation, performance are systematically investigated. On one hand, can effectively passivate trap states Sn dangling bonds O vacancies SnO surface Lewis acid/base coordination, which conducive improving conductivity film accelerating electron extraction. other modification assists formation high‐quality with low density due its strong interaction PbI . Consequently, PBGH‐modified exhibits a champion 24.79%, highest PCEs among all FACsPbI 3 ‐based PSCs reported date. In addition, stabilities films devices under high temperature/humidity light illumination conditions also studied.

Язык: Английский

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Over 24% Efficient Poly(vinylidene fluoride) (PVDF)‐Coordinated Perovskite Solar Cells with a Photovoltage up to 1.22 V

Advanced Functional Materials, Год журнала: 2022, Номер 33(6)

Опубликована: Дек. 11, 2022

Abstract Recently, organic–inorganic metal halide perovskite solar cells (PSCs) have achieved rapid improvement, however, the efficiencies are still behind Shockley–Queisser theory mainly due to their high energy loss ( E LOSS ) in open‐circuit voltage V OC ). Due polycrystalline nature of solution‐prepared films, defects at grain boundaries as non‐radiative recombination centers greatly affect and limit device efficiency. Herein, poly(vinylidene fluoride) (PVDF) is introduced polymer‐templates film, where fluorine atoms PVDF network can form strong hydrogen‐bonds with organic cations coordinate bonds Pb 2+ . The interaction between perovksite enables slow crystal growth efficient defect passivation, which effectively reduce non‐radiation minimize PVDF‐based PSCs achieve a champion efficiency 24.21% excellent 1.22 V, one highest values reported for FAMAPb(I/Br) 3 ‐based PSCs. Furthermore, hydrophobic endow humidity stability, unencapsulated cell maintain initial >90% 2500 h under air ambient ≈50% humid consistently 1.20 V.

Язык: Английский

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Molecular Dipole Engineering of Carbonyl Additives for Efficient and Stable Perovskite Solar Cells

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(22)

Опубликована: Март 28, 2023

Carbonyl functional materials as additives are extensively applied to reduce the defects density of perovskite film. However, there is still a lack comprehensive understanding for effect carbonyl improve device performance. In this work, we systematically study additive molecules on passivation in films. After investigation, results confirm importance molecular dipole amplifying molecules. The with strong possesses advantages enhancing efficiency and stability solar cells (PSCs). optimization, companion PSCs 23.20 %, it can maintain long-term under harsh conditions. Additionally, large-area cell module-modified DLBA was 20.18 % (14 cm2 ). This work provides an important reference selection designing efficient additives.

Язык: Английский

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Revealing superoxide-induced degradation in lead-free tin perovskite solar cells

Energy & Environmental Science, Год журнала: 2022, Номер 15(12), С. 5274 - 5283

Опубликована: Янв. 1, 2022

Sn-based perovskite FASnI 3 suffers more severe degradation under light/O 2 than only O exposure, which is caused by the large amount of superoxide formation at numerous iodine vacancies through reaction between and photoexcited electrons.

Язык: Английский

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24.96%‐Efficiency FACsPbI₃ Perovskite Solar Cells Enabled by an Asymmetric 1,3‐Thiazole‐2,4‐Diammonium

Advanced Energy Materials, Год журнала: 2023, Номер 13(15)

Опубликована: Март 1, 2023

Abstract Surmounting complicated defects at the electron transport layer (ETL) and perovskite interface plays a non‐trivial role in improving efficiency stability of solar cells (PSCs). Herein, an asymmetric modification strategy (AIMS) is developed to passivate from both SnO 2 ETL buried surface via incorporating 1,3‐thiazole‐2,4‐diammonium (TDA) into /perovskite interface. Detailed experimental calculated results demonstrate that N3 (the nitrogen atom bonding imine) TDA preferentially cures free hydroxyl (OH), oxygen vacancy ( V O ), Sn‐related on surface, while N1 vinyl) more inclined Pb 2+ I − related surface. As result, TDA‐modified FACsPbI 3 PSC yields champion power conversion (PCE) 24.96% with gratifying open‐circuit voltage oc ) 1.20 V. In addition, optimized PSCs exhibit charming air‐operational unencapsulated device sustaining 97.04% its initial PCE after storage air conditions for 1400 h. The encapsulated maintains 90.21% maximum point tracking 500

Язык: Английский

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Mitigating Surface Deficiencies of Perovskite Single Crystals Enables Efficient Solar Cells with Enhanced Moisture and Reverse‐Bias Stability

Advanced Functional Materials, Год журнала: 2023, Номер 33(22)

Опубликована: Фев. 22, 2023

Abstract Metal halide perovskite single crystals are promising for diverse optoelectronic applications due to their outstanding properties. In comparison the bulk, crystal surface suffers from high defect density and is moisture sensitive; however, modification strategies of relatively deficient. Herein, solar cells based on methylammonium lead triiodide (MAPbI 3 ) thin selected as a prototype improve single‐crystal devices by modification. The trap passivation protection against MAPbI achieved one bifunctional molecule 3‐mercaptopropyl(dimethoxy)methylsilane (MDMS). sulfur atom MDMS can coordinate with bare Pb 2+ reduce nonradiative recombination. As result, modified show remarkable efficiency 22.2%, which highest value cells. Moreover, mitigates ion migration, leading enhanced reverse‐bias stability. Finally, cross‐link silane molecules forms protective layer surface, results in stability both materials devices. This work provides an effective way crystals, important improving performance cells, photodetectors, X‐ray detectors, etc.

Язык: Английский

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Highly‐Stable CsPbI₃ Perovskite Solar Cells with an Efficiency of 21.11% via Fluorinated 4‐Amino‐Benzoate Cesium Bifacial Passivation

Advanced Functional Materials, Год журнала: 2023, Номер 33(44)

Опубликована: Июль 7, 2023

Abstract The poor interface quality between cesium lead triiodide (CsPbI 3 ) perovskite and the electron transport layer limits stability efficiency of CsPbI solar cells (PSCs). Herein, a 4‐amino‐2,3,5,6‐tetrafluorobenzoate (ATFC) is designed as bifacial defect passivator to tailor perovskite/TiO 2 interface. comprehensive experiments demonstrate that ATFC can not only optimize conductivity, mobility, energy band structure TiO by passivation undercoordinated Ti 4+ , oxygen vacancy ( V O ), free OH defects but also promote yield high‐quality film synergistic Pb 2+ with CO group F atom, limiting I − migration via F···I interaction. Benefiting from above interactions, ATFC‐modified device yields champion power conversion (PCE) 21.11% an excellent open‐circuit voltage OC 1.24 V. Meanwhile, optimized PSC maintains 92.74% its initial after aging 800 h in air atmosphere, has almost no attenuation tracking at maximum point for 350 h.

Язык: Английский

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