Dipole Moments Regulation of Biphosphonic Acid Molecules for Self-assembled Monolayers Boosts the Efficiency of Organic Solar Cells Exceeding 19.7%

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(20), С. 14287 - 14296

Опубликована: Май 8, 2024

PEDOT:PSS has been widely used as a hole extraction layer (HEL) in organic solar cells (OSCs). However, their acidic nature can potentially corrode the indium tin oxide (ITO) electrode over time, leading to adverse effects on longevity of OSCs. Herein, we have developed class biphosphonic acid molecules with tunable dipole moments for self-assembled monolayers (SAMs), namely, 3-BPIC(i), 3-BPIC, and 3-BPIC-F, which exhibit an increasing moment sequence. Compared centrosymmetric axisymmetric 3-BPIC 3-BPIC-F higher adsorption energies (Eads) ITO, shorter interface spacing, more uniform coverage ITO surface, better interfacial compatibility active layer. Thanks incorporation fluorine atoms, exhibits deeper highest occupied molecular orbital (HOMO) energy level larger compared resulting enlarged work function (WF) ITO/3-BPIC-F substrate. These advantages could not only improve within device but also lower impedance reduce nonradiative recombination at interface. As result, OSCs using SAM based obtained record high efficiency 19.71%, is than that achieved from 3-BPIC(i) (13.54%) (19.34%). Importantly, 3-BPIC-F-based significantly enhanced stability utilizing HEL. Our offers guidance future design functional SAMs realize even performance cells.

Язык: Английский

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A Comprehensive Review of Organic Hole‐Transporting Materials for Highly Efficient and Stable Inverted Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер 34(25)

Опубликована: Фев. 7, 2024

Abstract Inverted perovskite solar cells (IPSCs) have attracted unprecedented attention due to their negligible hysteresis, long‐term operational stability, low temperature, and cost‐effective fabrication process, as well wide applications. The power conversion efficiency (PCE) of IPSCs has skyrocketed from 3.9% in 2013 certified 26.1% 2023, which is over the 25.8% regular counterpart, benefiting emergence a great number organic hole‐transporting materials (HTM). This review provides an overview recent development stability IPSCs, including small molecules conjugated conductive polymers. effective strategies for charge‐transport layer films are also discussed. Finally, prospective further outlined, developing novel fabricating techniques meet requirements commercial application.

Язык: Английский

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Bisphosphonate‐Anchored Self‐Assembled Molecules with Larger Dipole Moments for Efficient Inverted Perovskite Solar Cells with Excellent Stability

Advanced Materials, Год журнала: 2024, Номер 36(28)

Опубликована: Май 20, 2024

Abstract In the fabrication of inverted perovskite solar cells (PSCs), wettability, adsorbability, and compactness self‐assembled monolayers (SAMs) on conductive substrates have critical impacts quality films defects at buried perovskite‐substrate interface, which control efficiency stability devices. Herein, three bisphosphonate‐anchored indolocarbazole (IDCz)‐derived SAMs, IDCz‐1, IDCz‐2, IDCz‐3, are designed synthesized by modulating position two nitrogen atoms IDCz unit to improve molecular dipole moments strengthen π–π interactions. Regulating work functions (WF) FTO electrodes through energy levels, band bends upwards with a small offset for ITO/IDCz‐3/perovskite, thereby promoting hole extraction blocking electrons. As result, PSC employing IDCz‐3 as hole‐collecting layer exhibits champion PCE 25.15%, is record multipodal SAMs‐based PSCs. Moreover, unencapsulated device can be stored least 1800 h little degradation in performance.

Язык: Английский

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Glycol Monomethyl Ether‐Substituted Carbazolyl Hole‐Transporting Material for Stable Inverted Perovskite Solar Cells with Efficiency of 25.52%

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(33)

Опубликована: Апрель 30, 2024

Abstract Organic self‐assembled molecules (OSAMs) based hole‐transporting materials play a pivotal role in achieving highly efficient and stable inverted perovskite solar cells (IPSCs). However, the reported carbazol‐based OSAMs have serious drawbacks, such as poor wettability for solution spreading due to nonpolar surface, worse matched energy arrangement with perovskite, limited molecular species, which greatly limit device performance. To address above problems, novel OSAM [4‐(3,6‐glycol monomethyl ether‐9H‐carbazol‐9‐yl) butyl]phosphonic acid (GM‐4PACz) was synthesized material by introducing glycol ether (GM) side chains at carbazolyl unit. GM groups enhance surface of Indium Tin Oxide (ITO)/SAM substrate facilitate nucleation growth up film, suppress cation defects, release residual stress SAM/perovskite interface, evaluate level matching perovskite. Consequently, GM‐4PACz IPSC achieves champion PCE 25.52 %, respectable open‐circuit voltage ( V OC ) 1.21 V, high stability, possessing 93.29 % 91.75 their initial efficiency after aging air 2000 h or tracking maximum power point 1000 h, respectively.

Язык: Английский

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Self‐Assembled Monolayer Hole‐Selective Contact for Up‐Scalable and Cost‐Effective Inverted Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер 34(32)

Опубликована: Апрель 8, 2024

Abstract Inverted positive‐intrinsic‐negative ( p ‐i‐ n ) perovskite solar cells (IPSCs) have attracted widespread attention due to their low fabrication temperature, good stability in ambient air, and the potential for use flexible tandem devices. In recent years, self‐assembled monolayers (SAMs) been investigated as a promising hole‐selective contact IPSCs, leading an impressive record efficiency of about 26%, which is comparable that regular counterparts. This review focuses on progress SAM‐based IPSCs from perspective energy level matching, defect passivation, interface carrier extraction, SAMs’ improvement, well advances up‐scalable SAMs layers efficient modules A cost analysis other commonly used materials conducted evaluate cost‐effectiveness photovoltaic applications. Finally, future challenges are pointed out perspectives how up‐scale improve long‐term operational provided.

Язык: Английский

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Pros and cons of hole-selective self-assembled monolayers in inverted PSCs and TSCs: extensive case studies and data analysis

Energy & Environmental Science, Год журнала: 2024, Номер 17(17), С. 6157 - 6203

Опубликована: Янв. 1, 2024

HSSAMs with diverse structures, encompassing various anchoring and functional groups, were systematically categorized their multifaceted roles in inverted PSCs TSCs correlation device performance investigated.

Язык: Английский

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Materials chemistry for metal halide perovskite photovoltaics

Bulletin of the Chemical Society of Japan, Год журнала: 2024, Номер 97(3)

Опубликована: Янв. 7, 2024

Abstract Metal halide perovskite semiconductors are excellent materials for next-generation solar cells. As a result of research and development all over the world, photoelectric conversion efficiency single-cell devices has rapidly improved to 26% (as July 2023), while record silicon-on-perovskite tandem currently stands at 33.7% (reported in May 2023). Materials chemistry made many important contributions toward these remarkable results. In this account, we will introduce our achievements areas material improving performance photovoltaics, including high-purity precursor materials, inks tailored large-area printed films. Studies nucleation crystallization process, simulations, have led reliable fabrication high-quality Diverse new charge collection as well compounds effectively modify surfaces, cell performance.

Язык: Английский

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Achieving over 42 % indoor efficiency in wide-bandgap perovskite solar cells through optimized interfacial passivation and carrier transport

Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155512 - 155512

Опубликована: Сен. 6, 2024

Язык: Английский

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Tailored Lattice-Matched Carbazole Self-Assembled Molecule for Efficient and Stable Perovskite Solar Cells

Journal of the American Chemical Society, Год журнала: 2025, Номер 147(9), С. 8004 - 8011

Опубликована: Фев. 18, 2025

Self-assembled monolayer molecules have been widely employed as interfacial transport materials in inverted perovskite solar cells (PSCs), demonstrating high efficiency and improved device stability. However, self-assembling (SAM) often suffer from aggregation weak interactions with the layer, resulting inefficient charge transfer significant energy losses, ultimately limiting power conversion long-term stability of cells. In this work, we developed a series novel skeleton-matching carbazole isomer SAMs based on following key design principles: (1) introducing benzene ring structure to distort molecular skeleton SAM, thereby preventing achieving uniform distribution fluorine-doped tin oxide (FTO) substrates; (2) strategically incorporating methoxy groups onto at different positions (ortho, meta, para). These functional not only increase anchoring points layer but also fine-tune dipole moment. Among SAMs, m-PhPACz exhibits most favorable properties, maximum moment 2.4 D an O-O distance that aligns excellently diagonal lead ions adjacent lattice, enhancing SAM-perovskite interactions, facilitating efficient extraction, improving As result, new SAM-based PSCs achieved impressive 26.2%, 12.9% improvement. Moreover, devices demonstrated outstanding photothermal stability, retaining 96% their initial PCE after 1000 h 85 °C maintaining 90% 300 UV-light exposure.

Язык: Английский

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Challenges in the design and synthesis of self-assembling molecules as selective contacts in perovskite solar cells

Chemical Science, Год журнала: 2023, Номер 15(5), С. 1534 - 1556

Опубликована: Ноя. 10, 2023

We summarize the challenges to design and synthesize self-assembled molecules, discussing their synthetic routes structural features in relationship efficiency of perovskite-based solar cells where they are applied as selective contacts.

Язык: Английский

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