Centimeter-scale fullerene-free tin-based perovskite solar cells achieving over 14% efficiency DOI Creative Commons
Jia Liang, Tianpeng Li,

Feifei He

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Abstract Fullerene-based materials have traditionally served as the primary electron transport layers (ETLs) in environmentally friendly tin-based perovskite solar cells (TPSCs) due to their suitable band structures. However, they suffer from limitations such high cost, complex synthetic process, low mobilities, limited interactions with Sn-based perovskites, and challenges tuning chemical electrical structures, which hindered further improvements power conversion efficiency (PCE) of TPSCs. To tackle these issues, we propose a fullerene-free TPSC architecture introduce series low-cost non-fullerene materials, i.e. fluorinated triple-acceptor polymers (named P1, P2, P3), alternative ETLs. Compared fullerene-based ETL, indene-C60 bisadduct (ICBA), ETLs exhibit facile three orders magnitude higher structural flexibility. Additionally, form continuous conformal interfaces layers, enabling stronger more uniform over large-area layers. In 1-cm2 TPSCs, particularly those using P3 achieve remarkable PCE 14.39%, surpassing 10.61% observed TPSCs ICBA ETL. Notably, ETL achieved record 16.06% for small area 0.04-cm2 (certified at 15.90%). Furthermore, demonstrates exceptional stability, showing no significant degradation 1200 hours shelf storage maintaining nearly 86% its initial after 550 h maximum point tracking under 1-sun illumination. This enhanced stability is attributed robust hydrophobicity conferred by long alkyl side chains. Overall, this study substantiates substantial potential advancing both photovoltaic performance

Language: Английский

Enlarging moment and regulating orientation of buried interfacial dipole for efficient inverted perovskite solar cells DOI Creative Commons
Peng Yang, Yu Chen,

Jing Zhou

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 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-

Language: Английский

Citations

6
Spatially Isomeric Fulleropyrrolidines Enable Controlled Stacking of Perovskite Colloids for High‐Performance Tin‐Based Perovskite Solar Cells DOI Open Access
Jingfu Chen,

Jiefeng Luo,

Yuqing Li

et al.

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Abstract The advancement of tin‐based perovskite solar cells (TPSCs) has been severely hindered by the poor controllability crystal growth and energy level mismatch between fullerene‐based electron transport layer (ETL). Here, we synthesized three cis‐configured pyridyl‐substituted fulleropyrrolidines (PPF), specifically 2‐pyridyl (PPF2), 3‐pyridyl (PPF3), 4‐pyridyl (PPF4), utilized them as precursor additives to regulate crystallization kinetics during film formation. spatial distance two pyridine groups in PPF2, PPF3, PPF4 increases sequentially, enabling interact with more colloidal particles. These interactions effectively enlarge colloid size decelerate rate perovskite, resulting high‐quality PPF4‐based films reduced defect density lower exciton binding energy. Additionally, incorporated a well‐defined fullerene bis‐adduct, C 60 BB, an interlayer PCBM layers optimize alignment. Through synergistic effects our champion device achieved efficiency 16.05 % (certified: 15.86 %), surpassing 16 bottleneck setting new benchmark for TPSCs. Moreover, devices exhibited outstanding stability, retaining 99 their initial after 600 hours maximum power point tracking under 1 sun condition.

Language: Английский

Citations

4
Spatially Isomeric Fulleropyrrolidines Enable Controlled Stacking of Perovskite Colloids for High‐Performance Tin‐Based Perovskite Solar Cells DOI Open Access
Jingfu Chen,

Jiefeng Luo,

Yuqing Li

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 3, 2025

Abstract The advancement of tin‐based perovskite solar cells (TPSCs) has been severely hindered by the poor controllability crystal growth and energy level mismatch between fullerene‐based electron transport layer (ETL). Here, we synthesized three cis‐configured pyridyl‐substituted fulleropyrrolidines (PPF), specifically 2‐pyridyl (PPF2), 3‐pyridyl (PPF3), 4‐pyridyl (PPF4), utilized them as precursor additives to regulate crystallization kinetics during film formation. spatial distance two pyridine groups in PPF2, PPF3, PPF4 increases sequentially, enabling interact with more colloidal particles. These interactions effectively enlarge colloid size decelerate rate perovskite, resulting high‐quality PPF4‐based films reduced defect density lower exciton binding energy. Additionally, incorporated a well‐defined fullerene bis‐adduct, C 60 BB, an interlayer PCBM layers optimize alignment. Through synergistic effects our champion device achieved efficiency 16.05 % (certified: 15.86 %), surpassing 16 bottleneck setting new benchmark for TPSCs. Moreover, devices exhibited outstanding stability, retaining 99 their initial after 600 hours maximum power point tracking under 1 sun condition.

Language: Английский

Citations

1
Enhanced Interlayer Interactions in Tin Halide Perovskite Solar Cells with a Fluorinated Fullerene Derivative DOI
Cheng Wu, Miao Zhang,

Mingyu Yin

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1261 - 1266

Published: Jan. 26, 2025

Lead-free tin halide perovskite solar cells (TPSCs) have recently made significant progress in power conversion efficiency (PCE). However, the presence of mismatched energy levels and weak interlayer interactions between electron transport materials (ETMs) perovskites has limited achievable PCE. Here, a new fluorinated fullerene derivative, C60-FTPA (F12), was designed synthesized to construct binary ETM with C60-ETPA (F6) reported our group, resulting reduction defects improved molecular structure ordering. Furthermore, exhibited stronger interaction delivered PCE up 11.93%.

Language: Английский

Citations

1
Boosting Tin Perovskite Solar Cell Performance via Light-Induced Interface Doping DOI
Mulin Sun, Zhenzhu Zhao, Hao Xu

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Continuous breakthroughs have been achieved in the photoelectric conversion efficiency (PCE) of tin-based perovskite solar cells (TPSCs) recent years. Inspired by performance improvements observed during device storage, we identified beneficial light-induced interface doping (LIID) TPSCs. In situ analyses using X-ray photoelectron spectroscopy and ultraviolet reveal that ion migration oxidation at induce effects, enhancing carrier transport significantly boosting performance. By implementing specific illumination techniques or maximum power point tracking (MPPT) methods to achieve LIID, increased open-circuit voltage while maintaining a high short-circuit current, reaching PCE up 14.91%. Furthermore, this was sustained 70% its value after nearly 900 h continuous operation. Our study introduces novel approach addressing energy band mismatch, paving way for improved cells.

Language: Английский

Citations

1
Toward Maximizing Hole Selection with Self-Assembled Monolayers in Sn-Based Perovskite Solar Cells DOI Creative Commons
Donghoon Song, S.W. Shin,

Hui‐Ping Wu

et al.

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1292 - 1312

Published: Feb. 17, 2025

Language: Английский

Citations

1
Defects Mitigation and Charge Transport Promotion via a Multifunctional Lewis Base for Efficient 2D/3D Tin Perovskite Solar Cells DOI
Yali Chen, Kun Wang, Wei Chen

et al.

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

Published: Feb. 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.

Language: Английский

Citations

1
Crystallization Kinetics Regulation for Strain and Morphology Management Enables Efficient Tin Perovskite Solar Cells DOI Open Access
Yiting Jiang, Zhihao Zhang, Yunfan Wang

et al.

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

Published: March 17, 2025

Abstract Strain effects in polycrystalline perovskite films significantly impact the performance of solar cells (PSCs). For environmental‐friendly tin (Sn)‐based perovskites, relationship between their ultra‐fast crystallization and intrinsic strain remains unclear, engineering targeted for Sn‐based perovskites is lacking. Herein, based on situ photoluminescence ultraviolet‐visible absorption spectroscopies, how various stages affect compressive surface morphology investigated. Two are identified: Stage I, synchronization nucleation crystallization; II, evaporation residual solvents with further crystal growth. Prolongation I can reduce sub‐grain domains grain boundaries where concentrates. Sufficient duration II mitigate disordered degree regrowth aggregation clusters, avoiding formation stacking pinholes. The 1,2‐dichlorobenzene (DCB) as an antisolvent found to achieve optimal durations two stages. resultant film exhibits suppressed nonradiative recombination due alleviated strain, efficient interfacial carrier transfer benefited from improved morphology. Consequently, a 14.85%‐efficiency PSC high fill factor 79.32% achieved.

Language: Английский

Citations

1
Multidentate Fullerenes Enable Tunable and Robust Interfacial Bonding for Efficient Tin‐Based Perovskite Solar Cells DOI
Chao Sun, Hui Zhang, Shuo Cheng

et al.

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

Published: Sept. 5, 2024

Abstract Improving the efficiency of tin‐based perovskite solar cells (TPSCs) is significantly hindered by energy level mismatch and weak interactions at interface between fullerene‐based electron transport layers (ETLs). In this study, four well‐defined multidentate fullerene molecules with 3, 4, 5, 6 diethylmalonate groups, labeled as FM3, FM4, FM5, FM6 are synthesized, employed interfacial in TPSCs. It observed that increasing number functional groups these fullerenes leads to shallower lowest unoccupied molecular orbital (LUMO) levels enhance chemical interactions. Notably, FM5 exhibits a suitable robust interaction perovskite, effectively enhancing extraction defect passivation. Additionally, unique structure allows exposed carbon cage be tightly stacked upper after facilitating efficient charge transfer protecting from moisture oxygen damage. As result, FM5‐based device achieves champion 15.05%, surpassing PCBM‐based (11.77%), FM3‐based (13.54%), FM4‐based (14.34%), FM6‐based (13.75%) devices. Moreover, unencapsulated excellent stability, maintaining over 90% its initial even 300 h air exposure.

Language: Английский

Citations

8
Functionalized Thienopyrazines on NiOx Film as Self‐Assembled Monolayer for Efficient Tin‐Perovskite Solar Cells Using a Two‐Step Method DOI Creative Commons
Chun‐Hsiao Kuan, Shakil N. Afraj, Yuling Huang

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(39)

Published: July 8, 2024

Abstract Three functionalized thienopyrazines ( TP s), TP‐MN 1 ), TP‐CA 2 and TPT‐MN 3 ) were designed synthesized as self‐assembled monolayers (SAMs) deposited on the NiOx film for tin‐perovskite solar cells (TPSCs). Thermal, optical, electrochemical, morphological, crystallinity, hole mobility, charge recombination properties, well DFT‐derived energy levels with electrostatic surface potential mapping of these SAMs, have been thoroughly investigated discussed. The structure single crystal was successfully grown analyzed to support uniform SAM produced ITO/NiOx substrate. When we used HTM in TPSC, device showed poor performance. To improve efficiency utilized a combination new organic SAMs HTM, TPSC exhibited highest PCE 7.7 % ). Hence, /TP‐MN 1) acts model system development efficient SAM‐based TPSC. best our knowledge, anchoring CN/CN or CN/COOH groups has never reported elsewhere. based bilayer exhibits great enduring stability performance, retaining ~80 its original value shelf storage over 4000 h.

Language: Английский

Citations

5