Enlarging moment and regulating orientation of buried interfacial dipole for efficient inverted perovskite solar cells

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

Опубликована: Фев. 1, 2025

Carrier transport and recombination at the buried interface of perovskite have seriously restricted further development inverted solar cells (PSCs). Herein, an interfacial dipolar chemical bridge strategy to address this issue is presented. 2-(Diphenylphosphino) acetic acid (2DPAA) selected as linker reconstruct dipole, which effectively enlarges dipole moment 5.10 D optimizes a positive orientation, thereby accelerating vertical hole transport, suppressing nonradiative promoting crystallization. The champion device yields high power conversion efficiency (PCE) 26.53% (certified 26.02%). Moreover, extended wide-bandgap large-area devices, delivers PCEs 22.02% 24.11%, respectively. optimized devices without encapsulation also demonstrate great long-term shelf operational stability. Our work highlights importance orientation realize efficient stable PSCs. hindered cells. Here, authors employ achieving maximum 24.11% for small-

Язык: Английский

---

Tailoring Buried Interface and Minimizing Energy Loss Enable Efficient Narrow and Wide Bandgap Inverted Perovskite Solar Cells by Aluminum Glycinate Based Organometallic Molecule

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 3, 2025

Abstract Rational regulation of Me‐4PACz/perovskite interface has emerged as a significant challenge in the pursuit highly efficient and stable perovskite solar cells (PSCs). Herein, an organometallic molecule aluminum glycinate (AG) that contained amine (‐NH 2 ) hydroxyl (Al‐OH) groups is developed to tailor buried minimize interface‐driven energy losses. The Al‐OH selectively bonded with unanchored O═P‐OH bare NiO‐OH optimize surface morphology levels, while ‐NH group interacted specifically Pb 2+ retard crystallization, passivate Pb‐related defects, release residual stress. These interactions facilitate carrier extraction reduce losses, thereby realizing balanced charge transport. Consequently, AG‐modified narrow bandgap (1.55 eV) PSC demonstrates efficiency 26.74% (certified 26.21%) fill factor 86.65%; wide (1.785 realizes 20.71% champion excellent repeatability. PSCs maintain 91.37%, 91.92%, 92.00% their initial after aging air atmosphere, nitrogen‐filled atmosphere at 85 °C, continuously tracking maximum power‐point under one‐sun illumination (100 mW cm −2 for 1200 h, respectively.

Язык: Английский

---

Post‐Assembled Dipole Benzoic Acids Modified Me‐4PACz for Efficient and Stable Inverted Perovskite Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 16, 2025

Abstract Self‐assembled monolayers (SAMs), particularly those molecules composed of carbazole and phosphonic acid, are widely employed as effective hole‐selective layer (HSL) in inverted perovskite solar cells (PSCs). However, the insufficient chemical bond formation with metal oxides (ITO) self‐aggregation solvents acid SAM led to non‐uniform HSL, which turn affect power conversion efficiency (PCE) stability PSCs. Herein, a series benzoic materials (BAs), including p‐fluorobenzoic (FBA) p‐methylbenzoic (MBA), used post‐assembly effectively fill voids between [4‐(3,6‐dimethyl‐9H‐carbazole‐9‐yl)butyl]phosphonic (Me‐4PACz) form denser facilitates passivation buried interface. In addition, post‐assembled BAs different dipole moments can adjust work function Me‐4PACz facilitating transport extraction charge carriers. Consequently, PSCs based on Me‐4PACz/FBA HSL realize champion PCE 25.58%. Moreover, unencapsulated devices maintain 82% 94% after 800 h outdoor storage (RH≈60%) 2000 glove box, respectively. This technique enhances both device, blazing simple pathway for further development

Язык: Английский

---

Contact Potential Homogenization via Buried Interface Engineering Enables High‐Performance Wide‐Bandgap Perovskite Photovoltaics

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 25, 2025

Abstract Microscale imperfections and inhomogeneity at buried interface leads to energy losses insufficient carrier extraction of wide bandgap (WBG) perovskite solar cells (PSCs). Here, we report a collaborative strategy by introducing 3‐aminopropanoic acid (3‐APA) mix with [4‐(3,6‐dimethyl‐9H‐carbazol‐9‐yl)butyl]phosphonic (Me‐4PACz) as hole‐selective self‐assembled monolayer (SAM). With the addition 3‐APA, wettability precursors is increased. Furthermore, film morphology heterogeneity improved. As result, nonradiative recombination interfacial loss are greatly suppressed. This also marginally higher ionization potential monolayers, approximating valence band film. Benefits from suppressed charge transfer loss, mixed SAM present overcome passivation transport trade‐off, delivering V OC × FF 84.5% S–Q limit. The combine benefits enable efficient 1.67 eV WBG PSCs power conversion efficiency 22.4% high open circuit voltage 1.255 fill factor 85.5%. Under strategy, demonstrat all‐perovskite tandem 28.4%.

Язык: Английский

---

Suppressing the Bottom Small n Phases of Quasi-2D Perovskites for High-Performance Photovoltaic Applications

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Март 5, 2025

The bottom small n phases in quasi-two-dimensional (Q-2D) perovskite films significantly hinder their photovoltaic performance development due to severely low conductivity and nonideal band alignment the corresponding solar cells. In this study, we successfully suppressed growth of Q-2D Ruddlesden-Popper (RP) (BA2MA4Pb5I16, ⟨n⟩ = 5) by introducing 2,7-bis(diphenylphosphoryl)-9,9'-spirobifluorene (SPPO13) as an additive into precursor solution. It is interesting find that hole transport layer poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) our p-i-n device can attract SPPO13 π-π stacking effect. As a result, concentrates at bottom, coordination between PbI2 leads more [PbI6]4- octahedra gathering downside film. Thereby, large remain unwanted are suppressed. optimized achieves remarkable power conversion efficiency 18.41%, which, according knowledge, highest value for BA-MA-based perovskite. Moreover, also demonstrates outstanding stability, maintaining 99.5% 95.3% initial after being stored over 3500 h under maximum point tracking operation 400 h, respectively. Unlike conventional methods primarily address bulk or interface properties, approach uniquely combines effects defect passivation through phosphine oxide groups, leading enhanced crystallinity, vertical orientation, nonradiative recombination. This work provides new regulate n-phase promote behavior

Язык: Английский

---

Defects Mitigation and Charge Transport Promotion via a Multifunctional Lewis Base for Efficient 2D/3D Tin Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

Abstract Tin perovskite solar cells (PSCs) have garnered considerable attention as promising alternatives to lead PSCs due their lower toxicity and outstanding optoelectronic properties. However, efficiency stability, particularly in 2D/3D tin PSCs, are usually hindered by high defect densities inefficient carrier transport. In this study, a small‐molecule Lewis base with multiple functional groups‐cyanoacetohydrazide (CAH) is employed mitigate defects enhance charge transport PSCs. It revealed that the carbonyl, amine, cyano groups CAH form strong chemical bonds Sn 2+ ions, resulting synergetic coordination effects. Moreover, interaction between effectively regulates crystallization process of film, high‐quality film enhanced crystallinity, reduced density, modulated phase distribution. As result, optimized achieve remarkable power conversion 15.06%, marking one highest values for Furthermore, devices exhibit retaining 95% initial performance after 2000 h storage nitrogen atmosphere.

Язык: Английский

---

Efficient White Electroluminescence from Cu‐based Perovskite Achieved by High Hole Injection Core/Shell Structures

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Abstract The copper‐based (Cu‐based) halide perovskite possesses eco‐friendly features, bright self‐trapped‐exciton (broadband) emission, and a high color‐rendering index (CRI) for achieving white emission. However, the limited hole injection (HI) of Cu‐based perovskites has been bottle‐necking efficiency electroluminescence thus their application in light‐emitting diodes (W‐PeLEDs). In this study, we demonstrate p‐type cuprous sulfide (Cu 2 S) lattice‐connectedly capping over Cs 3 Cu I 5 to form lattice‐matched core/shell nanocrystals (NCs) by controlling reactivity sulfur (S) precursor synthesis. Interestingly, resultant /Cu S NCs significantly enhance mobility compared NCs. Besides, photoluminescence quantum yield increases from 26.8% 70.6% after lattice‐connected capping. Consequently, establishing structure CsCu /Cs W‐PeLEDs, an external 3.45% CRI 91 is realized, representing highest reported electroluminescent performance lead‐free W‐PeLEDs. These findings contribute guidelines effective strategies designing broadband materials device structures PeLEDs.

Язык: Английский

---

In Situ Formation of High-pK_a Cations for Perovskite Solar Cells

ACS Energy Letters, Год журнала: 2024, Номер 9(9), С. 4526 - 4533

Опубликована: Авг. 23, 2024

Surface passivation is one of the most promising strategies for improving illumination stability at high temperatures perovskite solar cells. However, commonly used surface agents should be presynthesized and were usually located or interfaces, making it challenging to suppress bulk defects simultaneously. Here, we present an approach in situ formation high-pKa cations ([N(Z)]-N-(Aminomethylene)guanidinium) eliminate charge interfacial sites Consequently, performance enhanced both n-i-p p-i-n structures, with highest reaching ∼25.4% 20.1% (64 cm2 aperture area). Additionally, treatment can applied extensive compositions, including triple cations, double single cation-based perovskites. The devices retain 94% their initial efficiency after 2000 h continuous light under maximum power point tracking (ISOS-L-1), representing best photostability among structured devices(>25%)reported date.

Язык: Английский

---

CuS Nanosheets as Additives in the Hole Transport Layers for Stable p-i-n Perovskite Solar Cells

Nano Energy, Год журнала: 2025, Номер unknown, С. 110652 - 110652

Опубликована: Янв. 1, 2025

Язык: Английский

---

Targeted Anchoring of All Cations with 5-Bromopyridine-3-sulfonic Acid for High-Performance Perovskite Solar Cells

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер 17(9), С. 14129 - 14137

Опубликована: Фев. 24, 2025

The quality of organic-inorganic hybrid perovskite films directly affects the application prospect solar cells (PSCs), where organic and inorganic cations are core elements that affect perovskite. additive strategy has been widely used to passivate cation-related defects in films. Here, precursor solution introduced 5-bromopyridine-3-sulfonic acid (BOH) with a potential all-cation passivation function. experimental results verified N atom on pyridine BOH molecular structure passivated by binding undercoordination Pb2+, sulfonic group inhibited nonradiative recombination through their interactions FA+ improving grain size crystallinity, enhancing film quality. Thanks all-cationic targeted anchoring effect BOH, efficiency BOH-treated device upgraded from 22.32 24.33%. Importantly, PSCs showed excellent stability after exposure 25% humidity for 1200 h at room temperature.

Язык: Английский

---