Record‐Efficiency Flexible Perovskite Solar Cells Enabled by Multifunctional Organic Ions Interface Passivation

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(24)

Published: April 18, 2022

Flexible perovskite solar cells (f-PSCs) have attracted great attention because of their unique advantages in lightweight and portable electronics applications. However, efficiencies are far inferior to those rigid counterparts. Herein, a novel histamine diiodate (HADI) is designed based on theoretical study modify the SnO2 /perovskite interface. Systematic experimental results reveal that HADI serves effectively as multifunctional agent mainly three aspects: 1) surface modification realign conduction band upward improve interfacial charge extraction; 2) passivating buried surface, 3) bridging between layers for effective transfer. Consequently, MA-free PSCs HADI-SnO2 electron transport layer (ETL) display not only high champion power conversion efficiency (PCE) 24.79% open-circuit voltage (VOC ) 1.20 V but also outstanding stability demonstrated by preserving 91% initial after being exposed ambient atmosphere 1200 h without any encapsulation. Furthermore, solution-processed ETL formed at low temperature (100 °C) utilized f-PSCs achieve PCE 22.44%, highest reported date.

Language: Английский

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Rubidium Fluoride Modified SnO₂ for Planar n‐i‐p Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(17)

Published: Feb. 17, 2021

Abstract Regulating the electron transport layer (ETL) has been an effective way to promote power conversion efficiency (PCE) of perovskite solar cells (PSCs) as well suppress their hysteresis. Herein, SnO 2 ETL using a cost‐effective modification material rubidium fluoride (RbF) is modified in two methods: 1) adding RbF into colloidal dispersion, F and Sn have strong interaction, confirmed via X‐ray photoelectron spectra density functional theory results, contributing improved mobility ; 2) depositing at /perovskite interface, Rb + cations actively escape interstitial sites lattice inhibit ions migration reduce non‐radiative recombination, which dedicates open‐circuit voltage ( V oc ) for PSCs with suppressed In addition, double‐sided passivated PSCs, on surface, p‐methoxyphenethylammonium iodide produces outstanding PCE 23.38% 1.213 V, corresponding extremely small deficit 0.347 V.

Language: Английский

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Interfacial Defect Passivation and Stress Release via Multi-Active-Site Ligand Anchoring Enables Efficient and Stable Methylammonium-Free Perovskite Solar Cells

ACS Energy Letters, Journal Year: 2021, Volume and Issue: 6(7), P. 2526 - 2538

Published: June 18, 2021

Interfacial trap-assisted non-radiative recombination and residual stress impede the further increase of power conversion efficiency (PCE) stability methylammonium-free (MA-free) perovskite solar cells (PSCs). Here, we report an interfacial defect passivation release strategy through employing multi-active-site Lewis base ligand (i.e., (5-mercapto-1,3,4-thiadiazol-2-ylthio)acetic acid (MTDAA)) to modify surface grain boundaries (GBs) MA-free films. Both experimental theoretical results confirm strong chemical interactions between multiple active sites in MTDAA molecule undercoordinated Pb2+ at or GBs It is demonstrated theoretically that adsorption more favorable thermodynamically as compared single-active-site adsorption, regardless PbI2 termination formamidinium iodide (FAI) types. modification much reduced density, increased carrier lifetime, almost thoroughly released stress. Upon passivation, PCE boosted from 20.26% 21.92%. The unencapsulated device modified by maintains 99% its initial after aging under relative humidity range 10–20% for 1776 h, 91% 60 °C 1032 h.

Language: Английский

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Chlorobenzenesulfonic Potassium Salts as the Efficient Multifunctional Passivator for the Buried Interface in Regular Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(20)

Published: March 28, 2022

Abstract The interfacial properties for the buried junctions of perovskite solar cells (PSCs) play a crucial role further enhancement power conversion efficiency (PCE) and stability devices. Delicate manipulation interface such as defect density, energy alignment, film quality, etc., guarantees efficient extraction transport photogenerated carriers. Herein, chlorobenzenesulfonic potassium salts are presented novel multifunctional agent to modify tin oxide (SnO 2 )/perovskite regular PSCs. increasing number carbon‐chlorine bonds (CCl) in 2,4,5‐trichlorobenzenesulfonic (3Cl‐BSAK) exhibit interaction with uncoordinated Sn, effectively filling oxygen vacancies SnO surface. Importantly, synergistic effects functional group‐rich organic anions ion achieved reduced carrier recombination, hysteresis. A champion PCE 24.27% open‐circuit voltage ( V OC ) up 1.191 modified devices obtained. unencapsulated maintain 80% their initial after aging at 80 °C 800 h atmosphere 95% 100 d. With 3Cl‐BSAK decoration, high semitransparent PSC 12.83% an average visible light transmittance (AVT) over 27% is also

Language: Английский

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Interfacial defect passivation and stress release by multifunctional KPF6 modification for planar perovskite solar cells with enhanced efficiency and stability

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 418, P. 129375 - 129375

Published: March 18, 2021

Language: Английский

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Multifunctional organic ammonium salt-modified SnO₂nanoparticles toward efficient and stable planar perovskite solar cells

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(7), P. 3940 - 3951

Published: Jan. 1, 2021

A novel and effective multifunctional modification strategy through the incorporation of Girard's Reagent T molecules to modify SnO₂nanoparticles, which simultaneously enhances efficiency stability is reported.

Language: Английский

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Bifunctional hole-shuttle molecule for improved interfacial energy level alignment and defect passivation in perovskite solar cells

Nature Energy, Journal Year: 2023, Volume and Issue: 8(5), P. 515 - 525

Published: April 17, 2023

Abstract Perovskite solar cells have reached a power conversion efficiency over 25%, and the engineering of interface between perovskite hole transport layer (HTL) has been crucial to achieve high performance. Here we design bifunctional molecule CBz-PAI with carbazole-triphenylamine phenylammonium iodide units passivate defects at perovskite/HTL interface. Owing favourable energy level alignment perovskite, acts as shuttle HTL. This minimizes difference quasi-Fermi splitting or ‘internal’ V oc , external device thus reducing voltage losses. As result, incorporating reach stabilized 24.7% maintain 92.3% initial after 1,000 h under damp heat test (85 °C 85% relative humidity) 94.6% 1,100 maximum point-tracking conditions.

Language: Английский

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Buried Interface Modification in Perovskite Solar Cells: A Materials Perspective

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(20)

Published: April 10, 2022

Abstract Organic–inorganic hybrid perovskite solar cells (PSCs) are promising third‐generation cells. They exhibit high power conversion efficiency (PCE) and, in theory, can be manufactured with less energy than several more established photovoltaic technologies, particularly solution‐processed PSCs. Various materials have been widely utilized to modify the buried bottom interface improve performance and long‐term stability of Here, latest progress modifying enhance PSCs is examined from a standpoint, which classified into inorganic salts, organic molecular polymer, carbon materials, perovskite‐related 2D materials. This material perspective useful determining tactics for achieving theoretical PCE value It also serves as solid reference adjustment other layered structure heterojunction devices.

Language: Английский

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Radical polymeric p-doping and grain modulation for stable, efficient perovskite solar modules

Science, Journal Year: 2023, Volume and Issue: 379(6629), P. 288 - 294

Published: Jan. 19, 2023

High-quality perovskite light harvesters and robust organic hole extraction layers are essential for achieving high-performing solar cells (PSCs). We introduce a phosphonic acid-functionalized fullerene derivative in mixed-cation perovskites as grain boundary modulator to consolidate the crystal structure, which enhances tolerance of film against illumination, heat, moisture. also developed redox-active radical polymer, poly(oxoammonium salt), that can effectively p-dope hole-transporting material by injection mitigates lithium ion diffusion. Power conversion efficiencies 23.5% 1-square-centimeter mixed-cation-anion PSCs 21.4% 17.1-square-centimeter minimodules were achieved. The retained 95.5% their initial after 3265 hours at maximum power point tracking under continuous 1-sun illumination 70° ± 5°C.

Language: Английский

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Cobalt Chloride Hexahydrate Assisted in Reducing Energy Loss in Perovskite Solar Cells with Record Open-Circuit Voltage of 1.20 V

ACS Energy Letters, Journal Year: 2021, Volume and Issue: 6(6), P. 2121 - 2128

Published: May 13, 2021

SnO2 is widely used and one of the most efficient electron transport layers in perovskite solar cells (PSCs). However, films often contain detrimental defects may also have mismatches energy level alignment with films, thus limiting open-circuit voltage (VOC). Managing band structure are critical to reduce loss PSCs. Herein, cobalt chloride hexahydrate (CoCl2·6H2O) introduced into a film, which shows favorable better charge extraction. Correspondingly, an enhanced VOC up 1.20 V was achieved along efficiency 23.82%, record at optical gap 1.54 eV planar Moreover, target devices show stability, retains 83.5% their initial efficiencies after 200 h under continuous irradiation. The doping method provides effective strategy for reducing further enhance

Language: Английский

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