Stabilization of photoactive phases for perovskite photovoltaics

Nature Reviews Chemistry, Journal Year: 2023, Volume and Issue: 7(7), P. 462 - 479

Published: April 26, 2023

Language: Английский

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Crystallization manipulation and holistic defect passivation toward stable and efficient inverted perovskite solar cells

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(9), P. 3825 - 3836

Published: Jan. 1, 2023

Synergistic modification of new intermediate phase assisted crystallization and upper interface passivation for enhanced crystallization, reduced defect density, released stress in perovskite films, enabling 24.61% efficient inverted devices.

Language: Английский

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Co‐Self‐Assembled Monolayers Modified NiO_x for Stable Inverted Perovskite Solar Cells

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(16)

Published: Jan. 11, 2024

Abstract [4‐(3,6‐dimethyl‐9H‐carbazol‐9yl)butyl]phosphonic acid (Me‐4PACz) self‐assembled molecules (SAM) are an effective method to solve the problem of buried interface NiO x in inverted perovskite solar cells (PSCs). However, Me‐4PACz end group (carbazole core) cannot forcefully passivate defects at bottom film. Here, a Co‐SAM strategy is employed modify PSCs. doped with phosphorylcholine chloride (PC) form improve monolayer coverage and reduce leakage current. The phosphate ions (Cl − ) PC can inhibit surface defects. Meantime, quaternary ammonium Cl fill organic cations halogen vacancies film enable passivation. Moreover, promote growth crystals, collaboratively defects, suppress nonradiative recombination, accelerate carrier transmission, relieve residual stress Consequently, modified devices show power conversion efficiencies as high 25.09% well excellent device stability 93% initial efficiency after 1000 h operation under one‐sun illumination. This work demonstrates novel approach for enhancing performance PSCs by modifying on .

Language: Английский

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Atomically Dispersed Silver‐Cobalt Dual‐Metal Sites Synergistically Promoting Photocatalytic Hydrogen Evolution

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

Published: April 25, 2023

Abstract Regulating the coordination environment of single‐atom sites is high necessity to promote catalytic performances photocatalysts. Herein, preparation atomically dispersed Co‐Ag dual‐metal anchored on P‐doped carbon nitride (Co 1 Ag ‐PCN) via supramolecular and solvothermal approaches reported, which demonstrates desirable performance for photocatalytic H 2 evolution from water splitting. The optimal Co ‐PCN catalyst achieves a remarkable hydrogen production rate 1190 µmol g −1 h with an apparent quantum yield (AQY) 1.49% at 365 nm, superior most newly reported metal‐N‐coordinated Systematic experimental characterizations density functional theoretic studies attribute enhanced activity synergistic effect dual exclusive configuration Co‐N 6 Ag‐N C , enhances charge promotes oriented electrons transport metal centers reduced free energy barriers by facilitating formation H* intermediates as key step in evolution. This study reveals versatile strategy tailor electronic structures synergies engineering neighboring environment.

Language: Английский

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Constructing molecular bridge for high-efficiency and stable perovskite solar cells based on P3HT

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Nov. 17, 2022

Poly (3-hexylthiophene) (P3HT) is one of the most attractive hole transport materials (HTMs) for pursuit stable, low-cost, and high-efficiency perovskite solar cells (PSCs). However, poor contact severe recombination at P3HT/perovskite interface lead to a low power conversion efficiency (PCE). Thus, we construct molecular bridge, 2-((7-(4-(bis(4-methoxyphenyl)amino)phenyl)-10-(2-(2-ethoxyethoxy)ethyl)-10H-phenoxazin-3-yl)methylene)malononitrile (MDN), whose malononitrile group can anchor surface while triphenylamine form π-π stacking with P3HT, charge channel. In addition, MDN also found effectively passivate defects reduce large extent. Finally, PCE 22.87% has been achieved MDN-doped P3HT (M-P3HT) as HTM, much higher than PSCs pristine P3HT. Furthermore, gives un-encapsulated device enhanced long-term stability that 92% its initial maintain even after two months aging 75% relative humidity (RH) follow by month 85% RH in atmosphere, does not change operating maximum point (MPP) under 1 sun illumination (~45 oC N2) over 500 hours.

Language: Английский

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Orientation Engineering via 2D Seeding for Stable 24.83% Efficiency Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(14)

Published: Feb. 17, 2023

Abstract Organic‐inorganic hybrid perovskite solar cells (PSCs) have been extensively researched as a promising photovoltaic technology, wherein the orientation of film plays crucial role in power conversion efficiency (PCE) and stability. Here, seed‐mediated method is developed to situ grow layer 2D seed for epitaxial growth 3D atop it construct high‐quality 2D/3D heterojunction. It found that exhibits preferred [112] direction, which different from traditional perovskites with [001] orientation. The oriented consists large‐sized grains low defect density, long charge‐carrier lifetime, good stability, resulting efficient PSCs champion 24.83%. In addition, devices exhibit high stability under ambient, thermal, continuous light‐soaking conditions. This work provides an effective strategy achieving films tunable simultaneously boost PSCs.

Language: Английский

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Self‐Driven Prenucleation‐Induced Perovskite Crystallization Enables Efficient Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(22)

Published: March 31, 2023

Abstract Perovskite film with high crystal quality is fundamental to achieving high‐performance solar cells. A fast nucleation process crucial improving the crystallization quality. Here, we propose a self‐driven prenucleation strategy achieve nucleation. This realized through rational solvent design. The key characteristics of different solvents are systematically evaluated. Among them, formamide, ultra‐high dielectric constant, low Gutman donor number, and boiling point, selected as co‐solvent. These unique render formamide double‐face that good for formamidinium iodide (FAI) CsI while poor PbI 2 . As result, induces ‐DMSO seeding crystals accelerates nucleation, crystalline perovskite film. efficiency hole transport layer‐free carbon‐based cells boosted beyond 19 % first time.

Language: Английский

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Facile construction of CuO/g-C3N4 heterojunctions with promoted photocatalytic hydrogen generation behaviors

Fuel, Journal Year: 2023, Volume and Issue: 353, P. 129224 - 129224

Published: July 19, 2023

Language: Английский

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Phosphonate Diacid Molecule Induced Crystallization Manipulation and Defect Passivation for High‐Performance Inverted MA‐Free Perovskite Solar Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 18, 2024

Abstract Inverted perovskite solar cells (PSCs) comprising formamidinium‐cesium (FA‐Cs) lead triiodide have garnered considerable attention due to their impressive efficiency and remarkable stability. Nevertheless, synthesizing high‐quality FA‐Cs alloyed films presents challenges, primarily attributable the intricate interphase process involved absence of methylammonium (MA + ) mixed halogens. Here, additive 3‐phosphonopropanoic acid (3‐PPA) is introduced, with bifunctional phosphonic groups, into precursor modulate crystal growth provide passivation at grain boundaries. In situ characterization reveals that 3‐PPA can form a “rapid nucleation, slow growth” mechanism, resulting in enlarged grains enhanced crystallinity. addition, serves passivate boundary defects release residual strain by forming molecular bridging, leading passivated achieving fluorescence lifetime 5.79 microseconds favorable n‐type contact interface. As result, devices incorporating achieve champion power conversion (PCE) 24.05% an ultra‐high fill factor (FF) 84.22%. More importantly, optimized exhibit satisfactory stability under various testing conditions. The findings underscore pivotal role multifunctional additives crystallization control defect for high‐performance MA‐free pure iodine PSCs.

Language: Английский

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Crystallization and Orientation Modulation Enable Highly Efficient Doctor-Bladed Perovskite Solar Cells

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: June 29, 2023

With the rapid rise in perovskite solar cells (PSCs) performance, it is imperative to develop scalable fabrication techniques accelerate potential commercialization. However, power conversion efficiencies (PCEs) of PSCs fabricated via two-step sequential deposition lag far behind state-of-the-art spin-coated ones. Herein, additive methylammonium chloride (MACl) introduced modulate crystallization and orientation a doctor-bladed film ambient conditions. MACl can significantly improve quality increase grain size crystallinity, thus decreasing trap density suppressing nonradiative recombination. Meanwhile, also promotes preferred face-up (100) plane film, which more conducive transport collection carriers, thereby improving fill factor. As result, champion PCE 23.14% excellent long-term stability are achieved for based on structure ITO/SnO2/FA1-xMAxPb(I1-yBry)3/Spiro-OMeTAD/Ag. The superior PCEs 21.20% 17.54% 1.03 cm2 PSC 10.93 mini-module, respectively. These results represent substantial progress large-scale high-performance practical applications.

Language: Английский

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