Tuning Isomerism Effect in Organic Bulk Additives Enables Efficient and Stable Perovskite Solar Cells

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Jan. 10, 2025

Abstract Organic additives with multiple functional groups have shown great promise in improving the performance and stability of perovskite solar cells. The can passivate undercoordinated ions to reduce nonradiative recombination losses. However, how these synergistically affect enhancement beyond passivation is still unclear. Specifically, isomeric molecules different substitution patterns or molecular shapes remain elusive designing new organic additives. Here, we report two carbazolyl bisphosphonate additives, 2,7-CzBP 3,6-CzBP. isomerism effect on charge transport process was studied. similar effects through interactions, e.g., P = O···Pb, O···H–N N–H···I. further bridge crystallites facilitates transport. Power conversion efficiencies (PCEs) 25.88% 21.04% were achieved for 0.09 cm 2 devices 14 modules after treatment, respectively. exhibited enhanced operational maintaining 95% initial PCE 1000 h continuous maximum power point tracking. This study hints at importance tuning positions which paves way innovation next-generation multifunctional aromatic

Language: Английский

---

A Chain Entanglement Gelled SnO₂ Electron Transport Layer for Enhanced Perovskite Solar Cell Performance and Effective Lead Capture

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

Published: Jan. 8, 2025

Abstract SnO₂ is a widely used electron transport layer (ETL) material in perovskite solar cells (PSCs), and its design optimization are essential for achieving efficient stable PSCs. In this study, the situ formation of chain entanglement gel polymer electrolyte reported an aqueous phase, integrated with as ETL. Based on self‐polymerization 3‐[[2‐(methacryloyloxy)ethyl]dimethylammonium]propane‐1‐sulfonic acid (DAES) environment, combining catalytic effect LiCl (as Lewis acid) salting‐out effect, introduction polyvinylpyrrolidone (PVP) other chain, gelled SnO 2 (G‐SnO ) structure successfully constructed wide range functions. The PDEAS‐PVP achieves passivation Pb ⁺ capture through chemical chelation mechanisms explored. results demonstrated that all‐in‐air prepared PSC based G‐SnO exhibited excellent power conversion efficiency (PCE) 24.77% retained 83.3% their initial after 2100 h air exposure. Additionally, exposes more C═O S═O active sites, significantly enhanced lead absorption capability

Language: Английский

---

Directional Management Self‐Additive Spacer Cations for Stable 2D Ruddlesden–Popper Perovskite Solar Cells with Efficiency over 21%

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(32)

Published: March 14, 2024

Abstract 2D Ruddlesden–Popper perovskites are highly regarded materials for improving the stability of perovskite solar cells (PSCs). Wherein, self‐additive have recently been proposed to provide substantial strategies managing crystallization kinetics and bulk defects. For a profound understanding formation mechanisms, herein, with selecting three as demonstrations, comprehensive analysis behavior combing experimental theoretical calculations is conducted. Self‐additive exhibit more suitable energies strong interaction, which conducive realize effect form stable structure. As demonstrated, glycine (Gly)‐based spacer cations played pivotal role in nucleation growth by adjusting aggregation state colloids precursor, resulting excellent‐quality films large average grain size (≈3 µm). Meanwhile, electronic distribution binding ( E b ) revealed that ethyl ester (Gly‐E) possesses robust internal interactions, will effectively mitigate defect enhance device stability. Endowing above outstanding feature, Gly‐E devices exhibited an optimized PCE 21.60%, one highest PCEs among all RP PSCs (n ≤ 6). The findings basis rational design achieving highly‐performance PSCs.

Language: Английский

---

Side Chain Functional Molecule Additives for Efficient and Stable Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: May 7, 2024

Abstract In the commercial development of perovskite solar cells, main challenge lies in achieving efficient devices with high stability. Additive engineering polycrystalline perovskites is considered as an effective approach to address this by passivating surface defects and reducing carrier losses associated these defects. work, passivation effect molecules different side chain groups on role binding energy mitigating loss are studied. The findings reveal that thiophene group particularly enhancing hole transport. Consequently, treated 2‐thienylmethylamine hydrochloride (TMAC) demonstrate a champion power conversion efficiency (PCE) 24.63%. Furthermore, TMAC‐treated exhibit remarkable stability, maintaining over 93.13% their initial efficiencies after 1200 h continuous illumination under maximum point tracking (MPPT). This research presents pathway enhance optoelectronic performance stability cells.

Language: Английский

---

Bipolar Pseudohalide Ammonium Salts Bridged Perovskite Buried Interface toward Efficient Indoor Photovoltaics

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 4, 2024

Abstract Due to the higher photon energy under indoor photovoltaic conditions, using perovskite materials with wider bandgaps has become a consensus. However, updating absorbers requires additional adaptations involving at least two layers of transport and interfaces, increasing development complexity. This study acknowledges that buried interface is primary location for generation photoinduced carriers, achieving efficient carrier separation this will solve most open circuit voltage ( V OC ) loss issues encountered in transitioning from solar photovoltaics photovoltaics. Therefore, class bipolar pseudohalide ammonium salts proposed use as bridging agents effectively resolve lattice misalignment insufficient driving force when broadening bandgap, thereby reducing The optimized device exhibits an excellent photoelectric conversion efficiency (PCE) 41.04%, record‐high 1.08 V. It also demonstrates impressive long‐term operational stability T 80 lifetime 1000 h. Substituting various non‐buried different categories wide‐bandgap does not alter effectiveness, proving its universality.

Language: Английский

---

Ligand‐Pinning Induced Size Modulation of CsPbI₃ Perovskite Quantum Dots for Red Light‐Emitting Diodes

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(44)

Published: July 16, 2024

Abstract Perovskite quantum dots (PQDs) show high potential for new‐generation light‐emitting diodes (LEDs) due to their outstanding optoelectronic properties. Even though the red PQD‐LEDs can be realized through mixing halide in PQDs tune spectroscopies, may suffer from phase separation under a electric field, predominantly affecting LED applications. Herein, ligand‐pinning‐assisted approach is reported spectroscopies of CsPbI 3 PQDs, which vinyl phosphonic acid (VPA) applied as function ligands regulate nucleation and growth during synthesis. Systematically experimental studies theoretical calculations are conducted comprehensively understand functions VPA PQD synthesis, reveals that with binding energy Pb 2+ cations could firmly anchor on surface matrix without desorption, regulating thus resulting tunable being realized. Meanwhile, also renovate defective substantially diminishing trap‐induced nonradiative recombination. Consequently, deliver external efficiency 22.83%, significantly improved compared control devices. This work provides new avenue toward high‐performing LEDs.

Language: Английский

---

In situ Crosslinked Robust Molecular Zipper at the Buried Interface for Perovskite Photovoltaics

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

Published: Feb. 16, 2025

Abstract The brittle buried interface, characterized by weak adhesion to the substrate, numerous imperfections, and unfavorable strain, poses a significant challenge that impairs overall performance long‐term stability of perovskite solar cells (PSCs). Herein, robust molecular zipper is constructed through in situ polymerization self‐assembly monomer 4‐vinylbenzoic acid (VA), tightly link interface substrate n‐i‐p PSCs with an adhesive strength as high 10.77 MPa. modified exhibits improved morphology, suppressed defects, released matched energy level alignment. resulting deliver absolute gain ≥1.67% champion power conversion efficiency based on both one‐step deposition protocol two‐step one, demonstrating universality this strategy across different film‐processing scenarios. unencapsulated can retain 94.2% their initial after 550 h linear extrapolated T 90 value 1230 h, per ISOS‐L‐2 protocol. This work provides facile reinforce PSCs.

Language: Английский

---

Triisocyanate Derived Interlayer and High‐Melting‐Point Doping Promoter Boost Operational Stability of Perovskite Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(17)

Published: Feb. 28, 2024

Abstract Formamidinium lead triiodide serves as the optimal light‐absorbing layer in single‐junction perovskite solar cells. However, achieving operational stability of high‐efficiency n‐i‐p type devices at elevated temperatures remains challenging. In this work, we implemented effective surface modifications on microcrystalline films. This involved nucleophilic addition formamidinium cations and coordination residual PbI 2 with triphenylmethane triisocyanate well subsequent polymerization. The situ growth a cross‐linking network chemically anchored film approach effectively reduced trap densities, favorably altered work function, suppressing interface charge recombination thus enhancing cell efficiency. Coupled high‐melting‐point air‐doping promoter, fabricated cells surpassing 25 % efficiency, demonstrating excellent 65 °C.

Language: Английский

---

Dual-Site Passivation Coupling Internal Encapsulation via 3,5-Bis(trifluoromethyl)benzenethiol for Efficient and Stable Perovskite Solar Cells

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

Perovskite solar cells (PSCs) have made significant progress in efficiency, but their long-term operational stability remains an important yet challenging issue. Here, a dual-site passivation coupling internal encapsulation strategy is developed by introducing 3,5-bis(trifluoromethyl)-benzenethiol (35BBT) at the perovskite (PVK)/hole transport layer (HTL) interface. 35BBT provides dual active sites containing sulfur (S) atoms and fluorine (F) atoms, where S sulfhydryl group F trifluoromethyl coordinate with unpaired Pb2+ to form bonds, meanwhile hydrogen bonds organic cations. This mitigates deep shallow defects PVK/HTL Notably, 35BBT, hydrophobic benzene rings covering layer, enables protect films from water oxygen invasion. Consequently, Ag-based device treatment achieves efficiency enhancement 22.03% 23.86%, retaining 89.1% of its initial even after 2000 h air exposure. fabricated also exhibits thermal 60 °C. study offers avenue for simultaneously passivating interface inhibiting water/oxygen erosion, thereby enabling fabrication efficient stable PSCs future commercial applications.

Language: Английский

---

Templating the Buried Interface of a Perovskite Film by a 2D Metal–Organic Framework for Efficient and Stable Solar Cells

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(14), P. 5685 - 5694

Published: March 28, 2024

The surface microstructure of the electron transport layer (ETL) is crucial for performance and stability n–i–p perovskite solar cells (PSCs) as it affects crystallization. However, improving ETL to simultaneously eliminate interface defects enhance crystalline quality a key challenge date. To address this issue, we have developed 2D metal–organic framework (MOF), Zn-TCPP, using multifunctional template modulate ETL/perovskite interface. Zn-TCPP features periodic pore structure that promotes ordered nucleation perovskite, resulting in an improvement film crystallinity. Furthermore, its organic linker can interact with Pb2+ I–, reducing density defects. Moreover, immersed within pores forms radial junctions, leading increased charge extraction efficiency. Consequently, PSCs based on nanosheets exhibit enhanced power conversion efficiency (23.54%) they demonstrate significantly improved environmental resistance, retaining 88% their original after 550 h period. This study underscores tremendous potential low-dimensional MOF materials optimizing PSC performance.

Language: Английский

---