Building a Charge Transfer Bridge between g-C₃N₄ and Perovskite with Molecular Engineering to Achieve Efficient Perovskite Solar Cells

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(11), P. 13815 - 13827

Published: March 5, 2024

Effective defect passivation and efficient charge transfer within polycrystalline perovskite grains corresponding boundaries are necessary to achieve highly solar cells (PSCs). Herein, focusing on the boundary location of g-C3N4 during crystallization modulation perovskite, molecular engineering 4-carboxyl-3-fluorophenylboronic acid (BF) was designed obtain a novel additive named BFCN. With help strong bonding ability BF with both favorable intramolecular BFCN, not only has crystal quality films been improved due effective defects passivation, but also greatly accelerated formation additional channels grain boundaries. As result, champion BFCN-based PSCs highest photoelectric conversion efficiency (PCE) 23.71% good stability.

Language: Английский

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Gradient Doping for Stress‐Relief in Vapor‐deposited Perovskite Film to Achieve High‐performance p‐i‐n Perovskite Solar Cells with a 23% Efficiency

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

Abstract Vapor‐deposited p‐i‐n perovskite solar cells (PSCs) present key advantages such as low cost, excellent stability, low‐temperature fabrication, and compatibility with tandem architectures, positioning them strong contenders for industrial‐scale applications. However, their power conversion efficiency (PCE) remains lower than that of n‐i‐p architectures. Herein, a gradient doping strategy to alleviate the stress in vapor‐deposited films is introduced. Gradient chloride precursor film effectively slows crystallization rate at bottom layer, facilitating uniform mitigating residual strain. This method yielded high‐quality films, achieving PCE 23.0% PSCs 21.43% entirely PSCs. Additionally, devices demonstrates outstanding showing negligible performance degradation over 1600 h nitrogen storage maintaining 87.3% initial after 500 maximum point tracking under 1‐sun equivalent illumination 70% relative humidity. The provides valuable insights advancing large‐area perovskite‐textured silicon cells.

Language: Английский

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Fabrication of Large-Grained Perovskite Films Utilizing a Recrystallization Approach Involving Multiple Vapor Annealing Steps

ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(9), P. 3740 - 3749

Published: April 29, 2024

The swift advancement in perovskite solar cell (PSC) technology has garnered considerable interest, necessitating the move toward commercial production. Vapor deposition presents notable benefits for fabricating PSCs on a large scale with high output rates. Nonetheless, films produced via this method are prone to internal imperfections, poor crystallinity, and small grain sizes. Consequently, post-treatment processes vapor-deposited become crucial. In study, we explored impact of methylammonium chloride vapor annealing films. Our research revealed that traditional one-step could indeed enlarge size. However, extended duration treatment often resulted numerous pinholes inconsistent size distribution across film surface. Since presence pinhole-free is critical enhancing efficiency photovoltaic conversion, method, which fails improve may even degrade performance, not ideal. To address these issues fabricate high-quality without pinholes, implemented multiple approach. This rooted treatment-induced recrystallization strategy, involves repeated fine-tuning crystal growth direction controlling rate growth. As result, successfully superior uniformly distributed grains, enhanced all devoid pinholes. was augmented from an initial 800 nm approximately 3 μm. line improvements, PSC devices modules created using refined attained conversion efficiencies 21.29% (0.1475 cm2) 18.53% (10 cm2), respectively.

Language: Английский

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Self‐Assembled Molecule‐Assisted Simplified Processing of High‐Performance Solar Cells and Light‐Emitting Diodes

Solar RRL, Journal Year: 2024, Volume and Issue: 8(11)

Published: May 26, 2024

State‐of‐the‐art, high‐performance solar cells and light‐emitting diodes normally rely on tedious layer‐by‐layer sequential deposition of carrier transport layer light‐absorbing/emitting layers, which is not cost‐effective. Several recent exciting works have demonstrated surprising breakthroughs in terms simplified processing these optoelectronic devices. Upon the incorporation carbazole phosphonic acid molecules their derivatives into precursor ink beforehand, charge‐selective contact could spontaneously self‐assemble at buried interface between conducting substrate photoactive layer, results construction simplified‐structured devices that yield comparable performances to conventionally fabricated with full architectures. Herein, groundbreaking advancement via a convenient codeposition technique summarized, particular emphasis elucidating chemical mechanism self‐assembly mode highlighting unique advantages this strategy crystallization regulation, targeted defect passivation, dynamics modulation, comprehensive device performance improvement. Finally, associated challenges are critically discussed future research directions insightfully proposed, can revolutionize pathway toward constructing highly efficient cost‐effective manner setting forward commercialization.

Language: Английский

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Additive engineering via multiple-anchoring enhances 2D perovskite solar cells performance

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(58), P. 7487 - 7490

Published: Jan. 1, 2024

This work reports that incorporating an additive (TEMPIC) with multi-carbonyl functional groups in 2D perovskite can effectively passivate trap-states and reduce charge carrier recombination the device, thus enhancing device performance.

Language: Английский

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