Stabilized hole-selective layer for high-performance inverted p-i-n perovskite solar cells

Science, Journal Year: 2023, Volume and Issue: 382(6668), P. 284 - 289

Published: Oct. 19, 2023

P-i-n geometry perovskite solar cells (PSCs) offer simplified fabrication, greater amenability to charge extraction layers, and low-temperature processing over n-i-p counterparts. Self-assembled monolayers (SAMs) can enhance the performance of p-i-n PSCs but ultrathin SAMs be thermally unstable. We report a robust hole-selective layer comprised nickel oxide (NiOx) nanoparticle film with surface-anchored (4-(3,11-dimethoxy-7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (MeO-4PADBC) SAM that improve stabilize NiOx/perovskite interface. The energetic alignment favorable contact binding between NiOx/MeO-4PADBC reduced voltage deficit various compositions led strong interface toughening effects under thermal stress. resulting 1.53-electron-volt devices achieved 25.6% certified power conversion efficiency maintained >90% their initial after continuously operating at 65 degrees Celsius for 1200 hours 1-sun illumination.

Language: Английский

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Molecular dipole engineering-assisted strain release for mechanically robust flexible perovskite solar cells

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(11), P. 5423 - 5433

Published: Jan. 1, 2023

–CN additives are used to sew defects at perovskite grain boundaries and release GB stresses, resulting in low Young's modulus & high mechanical flexibility. Furthermore, 2F-2CN with a stronger molecular dipole enhances the efficiency stability of inverted f-PSCs, yielding exceptional efficiency.

Language: Английский

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Molecular Bridge on Buried Interface for Efficient and Stable Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(34)

Published: June 26, 2023

Abstract The interface of perovskite solar cells (PSCs) is significantly important for charge transfer and device stability, while the buried with impact on film growth has been paid less attention. Herein, we use a molecular modifier, glycocyamine (GDA) to build bridge SnO 2 /perovskite, resulting in superior interfacial contact. This achieved through strongly interaction between GDA , which also appreciably modulates energy level. Moreover, can regulate crystal growth, yielding enlarged grain size absence pinholes, exhibiting substantially reduced defect density. Consequently, PSCs modification demonstrate significant improvement open circuit voltage (close 1.2 V) fill factor, leading an improved power conversion efficiency from 22.60 % 24.70 %. Additionally, stabilities devices under maximum point 85 °C heat both perform better than control devices.

Language: Английский

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Perovskite Films Regulation via Hydrogen‐Bonded Polymer Network for Efficient and Stable Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(33)

Published: June 20, 2023

Perovskite solar cells (PSCs) are considered as a promising photovoltaic technology due to their high efficiency and low cost. However, long-term stability, mechanical durability, environmental risks still unable meet practical needs. To overcome these issues, we designed multifunctional elastomer with abundant hydrogen bonds carbonyl groups. The chemical bonding between polymer perovskite could increase the growth activation energy of film promote preferential high-quality film. Owing defect density gradient energy-level alignment, corresponding device exhibited champion 23.10 %. Furthermore, formation hydrogen-bonded network in film, target devices demonstrated excellent air stability enhanced flexibility for flexible PSCs. More importantly, coordinate Pb2+ ions, immobilizing lead atoms reduce release into environment. This strategy paves way industrialization high-performance

Language: Английский

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A Deformable Additive on Defects Passivation and Phase Segregation Inhibition Enables the Efficiency of Inverted Perovskite Solar Cells over 24%

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(38)

Published: June 13, 2023

The defects and phase segregation in perovskite will significantly reduce the performance stability of solar cells (PSCs). In this work, a deformable coumarin is employed as multifunctional additive for formamidinium-cesium (FA-Cs) perovskite. During annealing process perovskite, partial decomposition passivates Pb2+ , iodine, organic cation defects. Additionally, can affect colloidal size distributions, resulting relatively large grain good crystallinity target film. Hence, carrier extraction/transport be promoted, trap-assisted recombination reduced, energy levels are optimized films. Furthermore, treatment release residual stress. As result, champion power conversion efficiencies (PCEs) 23.18% 24.14% obtained Br-rich (FA0.88 Cs0.12 PbI2.64 Br0.36 ) Br-poor (FA0.96 Cs0.04 PbI2.8 Br0.12 based devices, respectively. flexible PSCs on exhibit an excellent PCE 23.13%, one highest values reported to date. Due inhibition segregation, devices thermal light stability. This work provides new insights into engineering passivating defects, stress relief, films, offering reliable method develop state-of-the-art cells.

Language: Английский

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A crystal capping layer for formation of black-phase FAPbI ₃ perovskite in humid air

Science, Journal Year: 2024, Volume and Issue: 385(6705), P. 161 - 167

Published: July 11, 2024

Black-phase formamidinium lead iodide (α-FAPbI 3 ) perovskites are the desired phase for photovoltaic applications, but water can trigger formation of photoinactive impurity phases such as δ-FAPbI . We show that classic solvent system perovskite fabrication exacerbates this reproducibility challenge. The conventional coordinative dimethyl sulfoxide (DMSO) promoted under high relative humidity (RH) conditions because its hygroscopic nature. introduced chlorine-containing organic molecules to form a capping layer blocked moisture penetration while preserving DMSO-based complexes regulate crystal growth. report power conversion efficiencies >24.5% solar cells fabricated across an RH range 20 60%, and 23.4% at 80% RH. unencapsulated device retained 96% initial performance in air (with 40 60% RH) after 500-hour maximum point operation.

Language: Английский

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Highly Efficient Perovskite/Organic Tandem Solar Cells Enabled by Mixed‐Cation Surface Modulation

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(49)

Published: Aug. 7, 2023

Perovskite/organic tandem solar cells (POTSCs) are gaining attention due to their easy fabrication, potential surpass the S-Q limit, and superior flexibility. However, low power conversion efficiencies (PCEs) of wide bandgap (Eg) perovskite (PVSCs) have hindered development. This work presents a novel effective mixed-cation passivation strategy (CE) passivate various types traps in wide-Eg perovskite. The complementary effect 4-trifluoro phenethylammonium (CF3 -PEA+ , denoted as CA+ ) ethylenediammonium (EDA2+ EA2+ reduces both electron/hole defect densities non-radiative recombination rate, resulting record open-circuit voltage (Voc PVSCs (1.35 V) high fill factor (FF) 83.29%. These improvements lead PCE 24.47% when applied fabricated POTSCs, highest date. Furthermore, unencapsulated POTSCs exhibit excellent photo thermal stability, retaining over 90% initial after maximum point (MPP) tracking or exposure 60 °C for 500 h. findings imply that synergic surface passivators is promising achieve high-efficiency stable corresponding POTSCs.

Language: Английский

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Interfacial Modification of NiO_x for Highly Efficient and Stable Inverted Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(25)

Published: April 12, 2024

Abstract Nickel oxide is one of the most promising hole‐transporting materials in inverted perovskite solar cells (PSCs) but suffers from undesired reactions with which leads to limited device performance and stability. Self‐assembled monolayers (SAMs) are demonstrated effectively optimize NiO x /perovskite interface, significance compactness SAM at interface less investigated. Here, a series methoxy‐substituted triphenylamine functionalized benzothiadiazole (TBT) based molecules, TBT‐BA, TBT‐FBA, TBT‐DBA, benzoic acid, 2‐fluorobenzoic acid isophthalic acids as anchoring groups used modify . TBT‐BA simplest structure form densest on , thus optimized /SAM/perovskite achieved enhanced charge collection suppressed interfacial reaction recombination. can also passivate due highest binding energy toward perovskite, corresponding PSCs show PCE 24.8% maintain 88.7% initial after storage 60 °C for 2635 h glovebox. The work provides important insights into designing molecules modification transporting layers efficient stable PSCs.

Language: Английский

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Multifunctional Trifluoroborate Additive for Simultaneous Carrier Dynamics Governance and Defects Passivation to Boost Efficiency and Stability of Inverted Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(14)

Published: Feb. 10, 2024

Abstract The main obstacles to promoting the commercialization of perovskite solar cells (PSCs) include their record power conversion efficiency (PCE), which still remains below Shockley–Queisser limit, and poor long‐term stability, attributable crystallographic defects in films open‐circuit voltage ( V oc ) loss devices. In this study, potassium (4‐tert‐butoxycarbonylpiperazin‐1‐yl) methyl trifluoroborate (PTFBK) was employed as a multifunctional additive target modulate bulk carrier dynamics PSCs. Apart from simultaneously passivating anionic cationic defects, PTFBK could also optimize energy‐level alignment devices weaken interaction between carriers longitudinal optical phonons, resulting lifetime greater than 3 μs. Furthermore, it inhibited non‐radiative recombination improved crystallization capacity film. Hence, rigid flexible p‐i‐n PSCs yielded champion PCEs 24.99 % 23.48 %, respectively. More importantly, due hydrogen bonding formamidinium fluorine, exhibited remarkable thermal, humidity, operational tracking at maximum point stabilities. reduced Young's modulus residual stress layer provided excellent bending stability for

Language: Английский

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Crystallization Kinetics of Hybrid Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 17, 2024

Abstract Metal halide perovskites (MHPs) are considered ideal photovoltaic materials due to their variable crystal material composition and excellent photoelectric properties. However, this variability in leads complex crystallization processes the manufacturing of perovskite (MHP) thin films, resulting reduced crystallinity subsequent performance loss final device. Thus, understanding controlling dynamics essential for improving stability PSCs (Perovskite Solar Cells). To investigate impact characteristics on properties MHP films identify corresponding modulation strategies, we primarily discuss relevant aspects kinetics, systematically summarize theoretical methods, outline techniques crystallization, including solution engineering, additive component which helps highlight prospects current challenges kinetics

Language: Английский

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