Revealing Steric‐Hindrance‐Dependent Buried Interface Defect Passivation Mechanism in Efficient and Stable Perovskite Solar Cells with Mitigated Tensile Stress

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(36)

Published: June 30, 2022

Abstract Interface engineering is one feasible and effective approach to minimize the interfacial nonradiative recombination stemming from defects, residual stress, energy level mismatch. Herein, a novel steric‐hindrance‐dependent buried interface defect passivation stress release strategy reported, which implemented by adopting series of adamantane derivative molecules functionalized with CO (i.e., 2‐adamantanone (AD), 1‐adamantane carboxylic acid (ADCA), 1‐adamantaneacetic (ADAA)) modify SnO 2 /perovskite interface. All modifiers play role in passivating mitigating strain, enhancing device performance. The steric hindrance chemical interaction between these perovskites as well determined distance bulky ring, gradually decreases AD, ADCA, ADAA. experimental theoretical evidences together confirmed effect strength. strength, effect, thus performance are negatively correlated hindrance. Consequently, ADAA‐modified achieves seductive efficiency up 23.18%. unencapsulated devices ADAA maintain 81% its initial after aging at 60 °C for 1000 h.

Language: Английский

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Tailoring multifunctional anion modifiers to modulate interfacial chemical interactions for efficient and stable perovskite solar cells

Nano Energy, Journal Year: 2022, Volume and Issue: 102, P. 107747 - 107747

Published: Aug. 24, 2022

Language: Английский

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Stabilizing Buried Interface via Synergistic Effect of Fluorine and Sulfonyl Functional Groups Toward Efficient and Stable Perovskite Solar Cells

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 15(1)

Published: Dec. 29, 2022

The interfacial defects and energy barrier are main reasons for nonradiative recombination. In addition, poor perovskite crystallization incomplete conversion of PbI2 to restrict further enhancement the photovoltaic performance devices using sequential deposition. Herein, a buried interface stabilization strategy that relies on synergy fluorine (F) sulfonyl (S=O) functional groups is proposed. A series potassium salts containing halide non-halogen anions employed modify SnO2/perovskite interface. Multiple chemical bonds including hydrogen bond, coordination bond ionic realized, which strengthens contact defect passivation effect. interaction between modification molecules along with SnO2 heightens incessantly as number S=O F augments. strength modifiers well gradually increases increase in F. effect positively correlated strength. kinetics regulated through compromise wettability substrates. Compared Cl-, all perform better optimization, band regulation passivation. device bis (fluorosulfonyl) imide achieves tempting efficiency 24.17%.

Language: Английский

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Indigo: A Natural Molecular Passivator for Efficient Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(22)

Published: April 22, 2022

Abstract Organic–inorganic hybrid lead halide perovskite solar cells have made unprecedented progress in improving photovoltaic efficiency during the past decade, while still facing critical stability challenges. Herein, natural organic dye Indigo is explored for first time to be an efficient molecular passivator that assists preparation of high‐quality film with reduced defects and enhanced stability. The molecule both carbonyl amino groups can provide bifunctional chemical passivation defects. In‐depth theoretical experimental studies show molecules firmly binds surfaces, enhancing crystallization films improved morphology. Consequently, Indigo‐passivated exhibits increased grain size better uniformity, boundaries, lowered defect density, retarded ion migration, boosting device up 23.22%, ≈21% large‐area (1 cm 2 ). Furthermore, enhance terms humidity thermal stress. These results not only new insights into multipassivation role dyes but also a simple low‐cost strategy prepare optoelectronic applications based on derivatives.

Language: Английский

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Functional Layers of Inverted Flexible Perovskite Solar Cells and Effective Technologies for Device Commercialization

Small Structures, Journal Year: 2023, Volume and Issue: 4(5)

Published: Feb. 7, 2023

Perovskite solar cells (PSCs) are now one of the most promising due to advantages such as high‐power conversion efficiency (PCE), low cost, and ease fabrication. Among PSCs, flexible perovskite (FPSCs) lightweight bendable, making them easier transport install than rigid hence can be used in wearable portable electronics, space energy systems, multifunctional integrated buildings, unmanned other applications. Compared with regular n–i–p FPSCs, inverted p–i–n FPSCs possess reliable operational stability, reduced hysteresis effect, low‐temperature fabrication process, strong potential for tandem devices. At present, PCEs single‐junction tandem‐inverted have reached 21.76% 24.7%, respectively, indicating commercial In this review, first, developments device functional layers including substrates, conductive electrodes, charge layers, active elucidated discussed thoroughly. Then, technologies accelerating commercialization summarized detail. Finally, perspectives on development provided.

Language: Английский

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Managing Interfacial Defects and Carriers by Synergistic Modulation of Functional Groups and Spatial Conformation for High‐Performance Perovskite Photovoltaics Based on Vacuum Flash Method

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(23)

Published: April 7, 2023

Interfacial nonradiative recombination loss is a huge barrier to advance the photovoltaic performance. Here, one effective interfacial defect and carrier dynamics management strategy by synergistic modulation of functional groups spatial conformation ammonium salt molecules proposed. The surface treatment with 3-ammonium propionic acid iodide (3-APAI) does not form 2D perovskite passivation layer while propylammonium ions 5-aminopentanoic hydroiodide post-treatment lead formation layers. Due appropriate alkyl chain length, theoretical experimental results manifest that COOH NH3+ in 3-APAI can coordination bonding undercoordinated Pb2+ ionic hydrogen octahedron PbI64- , respectively, which makes both be simultaneously firmly anchored on films. This will strengthen effect improve transport transfer. confers better than 3-APAI-modified device based vacuum flash technology achieves an alluring peak efficiency 24.72% (certified 23.68%), among highly efficient devices fabricated without antisolvents. Furthermore, encapsulated degrades less 4% after 1400 h continuous sun illumination.

Language: Английский

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Beyond two-dimension: One- and zero-dimensional halide perovskites as new-generation passivators for high-performance perovskite solar cells

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 83, P. 189 - 208

Published: May 3, 2023

Language: Английский

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Flexible Indoor Perovskite Solar Cells by In Situ Bottom‐Up Crystallization Modulation and Interfacial Passivation

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(24)

Published: March 20, 2024

A robust perovskite-buried interface is pivotal for achieving high-performance flexible indoor photovoltaics as it significantly influences charge transport and extraction efficiency. Herein, a molecular bridge strategy introduced utilizing sodium 2-cyanoacetate (SZC) additive at the to simultaneously achieve in situ passivation of interfacial defects bottom-up crystallization modulation, resulting photovoltaic applications. Supported by both theoretical calculations experimental evidences, illustrates how SZCs serve bridges, establishing bonds between SnO

Language: Английский

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Multifunctional Aminoglycoside Antibiotics Modified SnO₂ Enabling High Efficiency and Mechanical Stability Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(28)

Published: May 25, 2023

Abstract SnO 2 as an electron transport layer (ETL) has been widely used in regular planar perovskite solar cells (PSCs) owing to its high optical transmittance, less photocatalytic activity, and low‐temperature processing. However, ‐based PSCs still face many challenges which greatly impair their efficiency stability of PSCs. Herein, a novel effective multifunctional modification strategy is proposed by incorporating streptomycin sulfate (STRS) molecules with multiple functional groups into ETL. STRS can significantly suppress nanoparticle agglomeration, improve the electronic property , well reduce nonradiative recombination. At same time, interfacial residual tensile stress released energy level alignment becomes more matched. As result, STRS‐modified achieve higher 22.89% compared 20.61% control device exhibit hysteresis‐free feature. The humidity thermal based on STRS‐SnO are improved. Furthermore, flexible devices increased from 19.74% 20.79%, maintain >80% initial PCE after 4500 bending cycles bend radius 5 mm. This study provides low‐cost, facile, efficient for achieving

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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