Inverted perovskite solar cells using dimethylacridine-based dopants

Nature, Journal Year: 2023, Volume and Issue: 620(7974), P. 545 - 551

Published: May 24, 2023

Language: Английский

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Improving interface quality for 1-cm2 all-perovskite tandem solar cells

Nature, Journal Year: 2023, Volume and Issue: 618(7963), P. 80 - 86

Published: March 29, 2023

Language: Английский

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Organic Hole‐Transport Layers for Efficient, Stable, and Scalable Inverted Perovskite Solar Cells

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(44)

Published: June 30, 2022

Abstract Hole‐transporting layers (HTLs) are an essential component in inverted, p–i–n perovskite solar cells (PSCs) where they play a decisive role extraction and transport of holes, surface passivation, crystallization, device stability, cost. Currently, the exploration efficient, stable, highly transparent low‐cost HTLs is vital importance for propelling PSCs toward commercialization. Compared to their inorganic counterparts, organic offer multiple advantages such as tunable bandgap energy level, easy synthesis purification, solution processability, overall low Here, recent progress HTLs, including conductive polymers, small molecules, self‐assembled monolayers, utilized inverted systematically reviewed summarized. Their molecular structure, hole‐transport properties, levels, relevant properties resulting performances presented analyzed. A summary design principles future outlook efficient proposed. This review aims inspire further innovative development novel more scalable PSCs.

Language: Английский

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Co-deposition of hole-selective contact and absorber for improving the processability of perovskite solar cells

Nature Energy, Journal Year: 2023, Volume and Issue: 8(5), P. 462 - 472

Published: March 16, 2023

Language: Английский

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π‐Expanded Carbazoles as Hole‐Selective Self‐Assembled Monolayers for High‐Performance Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(51)

Published: Oct. 27, 2022

Carbazole-derived self-assembled monolayers (SAMs) are promising hole-selective materials for inverted perovskite solar cells (PSCs). However, they often possess small dipoles which prohibit them from effectively modulating the workfunction of ITO substrate, limiting PSC photovoltage. Moreover, their properties can be drastically affected by even subtle structural modifications, undermining final performance. Here, we designed two carbazole-derived SAMs, CbzPh and CbzNaph through asymmetric or helical π-expansion improved molecular dipole moment strengthened π-π interaction. The π-expanded has largest dipole, forming densely packed ordered monolayer, facilitated highly assembly observed in its π-scaffold's single crystal. These synergistically modulate crystallization atop tune workfunction. Consequently, champion employing showed an excellent 24.1 % efficiency stability.

Language: Английский

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Self-Assembled Monolayers for Interfacial Engineering in Solution-Processed Thin-Film Electronic Devices: Design, Fabrication, and Applications

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(5), P. 2138 - 2204

Published: Feb. 29, 2024

Interfacial engineering has long been a vital means of improving thin-film device performance, especially for organic electronics, perovskites, and hybrid devices. It greatly facilitates the fabrication performance solution-processed devices, including field effect transistors (OFETs), solar cells (OSCs), perovskite (PVSCs), light-emitting diodes (OLEDs). However, due to limitation traditional interfacial materials, further progress these devices is hampered particularly in terms stability, flexibility, sensitivity. The deadlock gradually broken through development self-assembled monolayers (SAMs), which possess distinct benefits transparency, diversity, sensitivity, selectivity, surface passivation ability. In this review, we first showed evolution SAMs, elucidating their working mechanisms structure–property relationships by assessing wide range SAM materials reported date. A comprehensive comparison various growth, fabrication, characterization methods was presented help readers interested applying works. Moreover, recent design applications mainstream electronic OFETs, OSCs, PVSCs OLEDs, summarized. Finally, an outlook prospects section summarizes major challenges SAMs used

Language: Английский

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Compact Hole‐Selective Self‐Assembled Monolayers Enabled by Disassembling Micelles in Solution for Efficient Perovskite Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(46)

Published: July 24, 2023

Self-assembled monolayers (SAMs) are widely employed as effective hole-selective layers (HSLs) in inverted perovskite solar cells (PSCs). However, most SAM molecules amphiphilic nature and tend to form micelles the commonly used alcoholic processing solvents. This introduces an extra energetic barrier disassemble during binding of on substrate surface, limiting formation a compact SAM. To alleviate this problem for achieving optimal growth, co-solvent strategy carbazole-based solution is developed. effectively increases critical micelle concentration be above enhances reactivity phosphonic acid anchoring group allow densely packed SAMs formed indium tin oxide. Consequently, PSCs derived from using MeO-2PACz, 2PACz, CbzNaph HSLs show universally improved performance, with SAM-derived device champion efficiency 24.98% stability.

Language: Английский

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Self-assembled monolayer enabling improved buried interfaces in blade-coated perovskite solar cells for high efficiency and stability

Deleted Journal, Journal Year: 2022, Volume and Issue: 1, P. e9120004 - e9120004

Published: March 21, 2022

Despite the rapidly increased power conversion efficiency (PCE) of perovskite solar cells (PVSCs), it is still quite challenging to bring such promising photovoltaic technology commercialization. One challenges upscaling from small-sized lab devices large-scale modules or panels for production. Currently, most efficient inverted PVSCs are fabricated on top poly[bis(4-phenyl)(2, 4, 6-trimethylphenyl)amine] (PTAA), which a commonly used hole-transporting material, using spin-coating method be incompatible with film deposition. Therefore, important develop proper coating methods as blade-coating slot-die that can compatible producing large-area, high-quality thin films. It found due poor wettability PTAA, blade-coated films PTAA surface often inhomogeneous large number voids at buried interface layer. To solve this problem, self-assembled monolayer (SAM)-based hole-extraction layer (HEL) tunable headgroups SAM modified provide better and facilitate interactions coated passivate interfacial defects. The more hydrophilic also nucleation growth by methods, forming compact uniform interface. In addition, molecules so their highest occupied molecular orbital (HOMO) levels have energy alignment valence band maxima (VBM) perovskite. Benefitted SAM-based substrate, champion device shows PCE 18.47% 14.64% active areas 0.105 cm² 1.008 cm², respectively. exhibits decent stability, maintain 90% its initial after continuous operation over 500 h 40 ℃ in inert atmosphere. Moreover, mini-module 14.13% an aperture area 18.0 cm². This work demonstrates great potential SAMs HELs large-area

Language: Английский

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Conjugated Self-Assembled Monolayer as Stable Hole-Selective Contact for Inverted Perovskite Solar Cells

ACS Materials Letters, Journal Year: 2022, Volume and Issue: 4(10), P. 1976 - 1983

Published: Sept. 9, 2022

The alkyl linker-based self-assembled monolayer (SAM) has emerged as an efficient hole-selective contact (HSC) for inverted perovskite solar cells (PSCs). Despite being effective in hole-extraction and interfacial passivation, its hole-transporting capability is limited by the insulating linker, along with poor stability due to isolated nonconjugated electron-rich moiety. Here, we report a series of conjugated SAMs that exhibit excellent photo- electrical stabilities. molecular structure not only enhances charge transport but also stabilizes arylamines through electron/charge delocalization. Moreover, it enables convenient modulation frontier orbital energy levels band alignment. By scrutinization conjugation-linker head, optimal SAM (MPA-Ph-CA) combination standard triple cation Cs0.05(FA0.92MA0.08)0.95Pb(I0.92Br0.08)3 achieved PSC power conversion efficiency (PCE) 22.53% (certified 22.12%). MPA-Ph-CA based devices showed stability, retaining over 95% their initial PCEs under one sun constant irradiation 800 h. synchronously enhanced suggest SAM-based HSCs are promising further advancing PSCs.

Language: Английский

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Versatile Hole Selective Molecules Containing a Series of Heteroatoms as Self‐Assembled Monolayers for Efficient p‐i‐n Perovskite and Organic Solar Cells

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(49)

Published: Sept. 16, 2022

Abstract Inverted type perovskite solar cells (PSCs) have recently emerged as a major focus in academic and industrial photovoltaic research. Their multiple advantages over conventional PSCs include easy processing, hysteresis‐free behavior, high stability, compatibility for tandem applications. However, the maximum power conversion efficiency (PCE) of inverted still lags behind those because suitable charge‐selective materials are limited. In this study, excellent hole‐selective introduced. A series tricyclic aromatic rings containing O, S, or Se, respectively, core heteroatom, along with phosphonic acid anchor, form self‐assembled monolayer (SAM) that directly contacts absorber. The influence heteroatoms structure on molecular energetics operating characteristics corresponding is investigated using complementary experimental techniques well density functional theory (DFT) calculations. It found all SAMs formed an energetically well‐aligned interface interaction energy between Se‐containing SAM absorber strongest among it reduces interfacial defect density, turn leading to extended charge carrier lifetime. As result, incorporating achieves PCE 22.73% retains ≈96% their initial after point tracking test 500 h without encapsulation under ambient conditions. All then employed organic (OSCs). Again, SAM‐based OSCs demonstrates highest 17.9% three OSCs. This study great potential precisely engineered use high‐performance cells.

Language: Английский

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