Self‐Induced Bi‐interfacial Modification via Fluoropyridinic Acid For High‐Performance Inverted Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 31, 2024

Abstract The uncontrolled crystallization of perovskite generates a significant number internal and interfacial defects, posing major challenge to the performance solar cells (PSCs). In this paper, novel bi‐interfacial modification strategy utilizing 5‐fluoropyridinic acid (FPA) is proposed modulate crystal growth provide defect passivation. It demonstrated that FPA self‐deposited at both top bottom interfaces films during thermal annealing. CO N functional groups in serve as chelating agents, binding closely uncoordinated Pb 2+ /Pb clusters, thereby passivating defects reducing charge recombination interfaces. strong chemical interactions between further stabilize Pb‐I framework, promoting formation high‐quality films, confirmed by situ photoluminescence measurements. Consequently, modified inverted PSCs achieved an exceptional power conversion efficiency (PCE) 25.37%. Moreover, devices retained over 93.17% initial after 3000 h continuous illumination under one‐sun equivalent conditions nitrogen atmosphere. This paper presents promising pathway for enhancing stability through self‐induced approach.

Язык: Английский

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Self-assembled hole-selective contact for efficient Sn-Pb perovskite solar cells and all-perovskite tandems

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 2, 2025

Self-assembled monolayers (SAMs) have displayed unpredictable potential in efficient perovskite solar cells (PSCs). Yet most of SAMs are largely suitable for pure Pb-based devices, precisely developing promising hole-selective contacts (HSCs) Sn-based PSCs and exploring the underlying general mechanism fundamentally desired. Here, based on prototypical donor-acceptor SAM MPA-BT-BA (BT), oligoether side chains with different length (i.e., methoxy, 2-methoxyethoxy, 2-(2-methoxyethoxy)ethoxy group) were custom-introduced benzothiadiazole unit to produce target acronyms MPA-MBT-BA (MBT), MPA-EBT-BA (EBT), MPA-MEBT-BA (MEBT), respectively, acting as HSCs Sn-Pb all-perovskite tandems. The introduction enables effectively accelerate hole extraction, regulate crystal growth passivate surface defects perovskites. In particular, benefiting from enhanced film quality suppressed interfacial non-radiative recombination losses, EBT-tailored LBG devices yield a champion efficiency 23.54%, enabling 28.61% monolithic tandems an impressive VOC 2.155 V excellent operational stability well 28.22%-efficiency 4-T development is highly desirable. authors report self-assembled achieve operationally stable

Язык: Английский

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Enhancing Interfacial Contact for Efficient and Stable Inverted Perovskite Solar Cells and Modules

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

Abstract Defective perovskite surfaces severely limit the development of inverted solar cells (PSCs). Here, impacts surface treatment are systematically investigated with organic ammonium salts, namely piperidinium iodide (PpI) and piperazinedihydroiodide (PDI), on performance formamidinium‐cesium (FACs)‐based PSCs. These results indicate that PpI, its high dipole moment, tends to form 1D structures surface, which hinders electron transport. By contrast, PDI post‐treatment does not lead formation such structures; instead, it forms a thin passivation layer homogenizes electric potential across surface. This merit in favorable alignment energy levels significant reduction non‐radiative recombination at perovskite/electron transport interface. As result, module (PSM) achieved power conversion efficiency (PCE) 22.08% an aperture area 11.1 cm 2 (certified 21.58%), showing low‐efficiency discrepancy versus small‐area counterpart 25.09%. Notably, PSM can maintain 92.5% initial PCE after continuous 1000 h 1‐sun operation 65 °C ambient air.

Язык: Английский

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Perfluorinated Anionic Surfactant Assisted Homogeneous Crystallization for Efficient and Stable Formamidinium‐Based Sn‐Pb Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Abstract Formamidinium (FA)‐based Sn‐Pb perovskite demonstrates superior thermal stability, making it well‐suited for all‐perovskite tandem solar cells. However, the uncontrolled crystallization process remains a significant challenge. In this study, an effective strategy is presented to regulate of FA‐based by incorporating perfluoroanionic surfactant (perfluorohexanesulfonic acid potassium salt, F 13 C 6 SO 3 K) into precursor. The multifunctional sites K, including atoms and − groups, interact with components stabilize colloidal distribution precursor modulate kinetics. This results in high‐quality films fewer defects. Consequently, cell (PSC) achieves champion efficiency 24.33%, open‐circuit voltage 0.895 V fill factor 83.2%. After continuous heating at 65 °C 1008 h, still maintain 91% its initial efficiency, which shows enhanced stability. When coupled wide‐bandgap subcell, reaches power conversion (PCE) 27.57%.

Язык: Английский

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Modulating competitive adsorption of hybrid self-assembled molecules for efficient wide-bandgap perovskite solar cells and tandems

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Март 28, 2025

The employment of self-assembled molecular hybrid could improve buried interface in perovskite solar cells (PSCs). However, the interplay among monolayers (SAMs) during deposition process has not been well-studied. Herein, we study interaction between co-adsorbents and commonly used SAM material, [4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) for wide-bandgap (WBG) PSCs. It is found that co-adsorbent, 6-aminohexane-1-sulfonic (SA) tends to fill uncovered sites without interference with Me-4PACz, ensuring formation a dense hole selective layer. Moreover, use SA/Me-4PACz mixed SAMs effectively reduce interfacial non-radiative recombination loss, optimize energy alignment at regulate crystallization WBG perovskite. As result, 1.77 eV PSCs deliver power conversion efficiency (PCE) 20.67% (20.21% certified) an impressive open-circuit voltage (VOC) 1.332 V (1.313 certified). By combining 1.26 narrow-bandgap (NBG) PSC, further fabricate 2-terminal all-perovskite tandem (TSCs) PCE 28.94% (28.78% 0.087 cm2 23.92% mini-module aperture area 11.3 cm2.

Язык: Английский

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Synergistic immobilization of ions in mixed tin-lead and all-perovskite tandem solar cells

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Апрель 11, 2025

Low-bandgap (LBG) mixed tin-lead (Sn-Pb) perovskite solar cells (PSCs) suffer from inferior performance due to their high defect density. Conventionally, ethylenediammonium diiodide (EDADI) is used as a surface passivator reduce defects and improve device photovoltaic performance, but it introduces severe hysteresis caused by excessive mobilized ions at the top interface. Here, we report mobile ion suppressing strategy of using hydrazine monohydrochloride (HM) bulk anchor free in LBG perovskites. The protonated (N2H5+) HM formed hydrogen bonds with iodine (I-) ions, while chloride (Cl-) occupied I- vacancies, collectively impeding migration thus mitigating movement-induced that arose EDADI usage. synergistic doping post-treatment significantly suppresses oxidation Sn2+, decreases trap density, inhibits rapid crystallization perovskite. Consequently, achieved champion efficiency 23.21% for PSCs. Integrating these wide-bandgap PSCs into all-perovskite tandem yields 28.55% (certified 28.31%) negligible hysteresis.

Язык: Английский

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Inhibition oxidation of Sn(II) and regulation crystallization of Sn-Pb perovskite film through interaction engineering for high-performance photovoltaic

Chemical Engineering Journal, Год журнала: 2024, Номер 500, С. 157236 - 157236

Опубликована: Окт. 30, 2024

Язык: Английский

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Multifunctional Action Site Strategy of a Buried Interface for High-Performance Perovskite Solar Cells

ACS Photonics, Год журнала: 2024, Номер 11(11), С. 4916 - 4922

Опубликована: Окт. 25, 2024

The buried interface is pivotal for enhancing both the efficiency and stability of p-i-n perovskite solar cells (PSCs). This because carrier extraction recombination processes can be significantly affected by defects that tend to form on bottom side. Herein, a dual-reaction site molecule homopiperazine-1,4-bis (2-ethanesulfonic acid) (HEA) employed as an effective multifunctional passivator self-assembled monolayer (SAM)/perovskite inverted PSCs. HEA has two sulfonic acid groups with double action sites, which effectively fill ITO vacancies unanchored SAM simultaneously passivate uncoordinated Pb2+ molecular bridge, achieving full coverage substrate orderly crystallization perovskites. resultant device presented satisfactory efficiencies 25.71% (0.0982 cm2) 24.26% (1 cm2). Our retained 91.8% its initial power conversion (PCE) after 1000 h operation under 1-sun illumination in nitrogen atmosphere. research offers important insights into further refinement enhancement interfaces

Язык: Английский

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Thermally Induced Neodymium‐Doped Strategy toward Wide Band Gap Perovskite Solar Cells with a Fill Factor over 86%

Small, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Abstract To approach the Shockley‐Queisser (S‐Q) limit in perovskite solar cells (PSCs), enhancing fill factor (FF), a crucial parameter associated with carrier transport and nonradiative recombination, is of paramount importance. In this paper, rare earths (RE), neodymium salt used as dopant 4‐(3‐,6‐dimethoxy‐9h‐carbazol‐9‐butyl) phosphonic acid (MeO‐4PACz) to obtain MeO‐4PACz:Nd 3+ , Nd migration induced during annealing. It worth noting that uniform diffusion layer significantly increases defect‐formation energy perovskite, thus reducing density defect states, greatly improving rate inhibited non‐radiative recombination. The experimental results show wide‐band gap (WBG) PSCs based on has an excellent power conversion efficiency (PCE) 22.82% FF 86.35%. proposed method provides direct for RE promote perovskites.

Язык: Английский

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MA-Free Lead–Tin Perovskites for All-Perovskite Tandem Solar Cells: Challenges, Strategies, and Perspectives

Nano Energy, Год журнала: 2025, Номер unknown, С. 110926 - 110926

Опубликована: Март 1, 2025

Язык: Английский

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