Multistage Regulation Strategy via Fluorine‐Rich Small Molecules for Realizing High‐Performance Perovskite Solar Cells DOI Creative Commons

Xiong Chang,

Kunpeng Li, Yong Han

et al.

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

Published: Dec. 12, 2024

Abstract Perovskite solar cells (PSCs) are an ideal candidate for next‐generation photovoltaic applications but face many challenges their wider application, including uncontrolled fast crystallization, trap‐assisted nonradiative recombination, and inefficient charge transport. Herein, a multistage regulation (MSR) strategy addressing these is proposed via the introduction of fluorine‐rich small molecules with multiple active points (i.e., 1‐[Bis(trifluoromethanesulfonyl)methyl]‐ 2,3,4,5,6‐pentafluorobenzene (TFSP)) into precursor solution perovskite film. The addition TFSP effectively delays regulates crystallization growth process film larger grains fewer defects, it improves coverage self‐assembled efficient induce strong binding affinity uncoordinated defects in Moreover, high fluorine content induces electronegativity to establish strength between electron transport layer. Finally, PSCs prepared by MSR demonstrated optimal power conversion efficiency (PCE) 25.46% maintained 91.16% initial PCE under nonpackaged air conditions at relative humidity 45% after 3000 h.

Language: Английский

Buried Interface Modulation Using Self‐Assembled Monolayer and Ionic Liquid Hybrids for High‐Performance Perovskite and Perovskite/CuInGaSe2 Tandem Photovoltaics DOI Open Access
Zihao Feng, Xinxing Liu, Ting Tian

et al.

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

Published: Jan. 6, 2025

Effective modifications for the buried interface between self-assembled monolayers (SAMs) and perovskites are vital development of efficient, stable inverted perovskite solar cells (PSCs) their tandem photovoltaics. Herein, an ionic-liquid-SAM hybrid strategy is developed to synergistically optimize uniformity SAMs crystallization above. Specifically, ionic liquid 1-butyl-3-methyl-1H-imidazol-3-iumbis((trifluoromethyl)sulfonyl)amide (BMIMTFSI) incorporated into SAM solution, enabling reduced surface roughness, improved wettability, a more evenly distributed potential film. Leveraging this optimized substrate, favorable growth high-quality crystals achieved. Furthermore, introduced functional ions readily bond with perovskites, effectively passivating undesirable cation or halide vacancies near interface. Remarkably, high power conversion efficiencies (PCEs) 25.68% 22.53% obtained normal-bandgap (≈1.55 eV) wide-bandgap (WBG) (≈1.66 PSCs along operational stability. Additionally, champion PCE 19.50% achieved semitransparent WBG PSCs, further delivering impressive 28.34% integrated four-terminal photovoltaics when combined CuInGaSe2 cells.

Language: Английский

Citations

4
Perfluorinated Anionic Surfactant Assisted Homogeneous Crystallization for Efficient and Stable Formamidinium‐Based Sn‐Pb Perovskite Solar Cells DOI Open Access
Tengfei Kong,

Yinjiang Liu,

Zihan Zhao

et al.

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

Published: Jan. 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%.

Language: Английский

Citations

2
Visible Light‐Triggered Self‐Welding Perovskite Solar Cells and Modules DOI

Xiongjie Li,

Bin Ding, Junyi Huang

et al.

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

Published: Nov. 20, 2024

Abstract Flexible perovskite solar cells (F‐PSCs) are highly promising for both stationary and mobile applications because of their advantageous features, including mechanical flexibility, lightweight thin nature, cost‐effectiveness. However, a number drawbacks, such as instability, make practical application difficult. Here, self‐welding dynamic diselenide that is triggered by visible light into the structure F‐PSCs to improve long‐term stability repairing cracks defects in absorber layer incorporated. The confers flexibility properties Cs 0.05 MA FA 0.9 PbI 3 layer, enabling optimized F‐PSC devices achieve power conversion efficiency 24.85% while retaining ca. 92% initial after undergoing 15 000 bending cycles at curvature radius mm. corresponding flexible large‐scale module with an active area 15.82 cm 2 achieved record PCE 21.65%.

Language: Английский

Citations

5
Stabilizing Precursor Solutions by Proton‐Rich Additive for High‐Performance Air‐Processed Solar Cells DOI Open Access
Kongxiang Wang,

Zhongtao Duan,

Hong Liu

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Storing perovskite precursor solutions under ambient conditions poses a significant challenge to commercialization, as humidity and oxidation accelerate ageing introduce defects in devices. A major contributor solution impurity phases is the deprotonation of hybrid organic cations, specifically methylammonium (MA+) formamidinium (FA+). In this work, proton-rich additive, 4-(aminomethyl)pyridine 2-iodide, used inhibit MA+ by generating free H+, thereby mitigating degradation cations oxygen stress. The treated stored for several days exhibits no condensation reaction products. Due synergistic effect H+ I-, films exhibit pure phase formation abnormal "aggregate" crystals. Therefore, additive reacts with FA+ form new complexes, termed N-(4-methylpyridine)formamidinium), which efficiently passivate nonradiative defects. Consequently, strategy enables solar cells achieve power conversion efficiency (PCE) 25.25%, demonstrating enhanced long-term stability both light thermal Notably, optimized device retains 95.5% its initial PCE after 1200 h continuous illumination 91.61% 600 at 85 °C 85% relative humidity.

Language: Английский

Citations

0
Buried interface engineering with amphoteric ion for inverted perovskite solar cells DOI
Liquan Zhang, Zhuo Chen, Jiayu Han

et al.

Applied Physics A, Journal Year: 2025, Volume and Issue: 131(4)

Published: April 1, 2025

Language: Английский

Citations

0
In Situ Construction of Multi‐Functional Polymer Network Toward Durable Perovskite Solar Cells DOI Creative Commons
Bingqian Zhang, Qiangqiang Zhao, Kun Gao

et al.

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

Published: April 30, 2025

Enhancing the crystalline quality of perovskite thin films and stabilizing their internal grain boundaries are essential in guaranteeing extended longevity solar cells. Herein, an situ polymerization strategy is presented to produce weak chemical bond networks films. The introduction acrylamide monomer into precursor solution facilitates rearrangement [PbI6]4- octahedra, resulting a significant enhancement crystal With presence C═C bonds, at can form polymer networks, which efficiently passivate detrimental defects associated with boundaries. cells impressive power conversion efficiency (PCE) 26.05% (certified 25.06%) achieved, combined highly improved operational stability T98 = 2034 h. As expected, large-area module based on this achieved PCE 23.02% active area 14 cm2.

Language: Английский

Citations

0
Facilitating High‐Quality Crystal Growth of Two‐Step Sequential Processed FAPbI3 Perovskite for Efficient Photovoltaics DOI

Yunze Li,

Zhan Shi, Jing Li

et al.

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

Published: May 21, 2025

Abstract The controllable two‐step deposition of perovskite films is advantageous for large‐area manufacturing. However, the incomplete reaction between initially deposited lead iodide (PbI 2 ) layer and subsequent organic ammonium salts remains a significant challenge, which ultimately degrades film quality. Differing from conventional PbI porosity regulation or ‐based intermediate phase engineering, this study innovatively introduces N‐methyl pyrrolidone (NMP) isopropylamine hydrochloride (IPACl) in salt solution to synergistically modulate crystal growth formamidinium triiodide (FAPbI 3 films. research findings suggest that coordinative solvent, NMP, can partially dissolve compact while simultaneously situ forming ‐NMP adducts, thereby promoting formation α ‐phase perovskite. Further integration IPACl plays role van der Waals interaction, enhancing oriented suppressing δ during thermal annealing. Consequently, highly crystalline FAPbI featuring enlarged grain size, more uniform morphology, smoother surface, lower defect density are demonstrated, rendering champion efficiency 25.50% processed solar cells, along with significantly improved stability. Moreover, doctor‐blade coated mini‐modules demonstrate efficiencies 20.30% 16.06% aperture areas 16 100 cm , respectively.

Language: Английский

Citations

0
Mitigating Carrier and Energy Losses via Interface Modulator Toward High‐Performance Perovskite Solar Cells DOI
Wangchao Chen, Xuan Chen,

S.J. Wang

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 23, 2025

Abstract Interface engineering has become the main force in reforming photogenerated carrier and energy losses perovskite solar cells (PSCs). Here, a multifaceted hole‐selective molecule C‐DPT, is designed synthesized with methoxy‐triphenylamine‐carbazole diphenyl‐triazine units, which employed as interface modulator between hole transport layer. The introduction of C‐DPT endows perovskite/hole layer heterojunction more flat physical contact, lower trap density, faster extraction. combined theoretical experimental results decipher that possessing compatible contact favorable binding ability can efficiently boost interfacial defect restoration, compensate energetic offset, promote transportation. As result, C‐DPT‐modified PSC delivers champion power conversion efficiency 24.02% conjunction pronouncedly improved long‐term ambient, thermal, humidity stability.

Language: Английский

Citations

0
Surface Passivation to Improve the Performance of Perovskite Solar Cells DOI Creative Commons

H. J. Lee,

Dawen Li

Energies, Journal Year: 2024, Volume and Issue: 17(21), P. 5282 - 5282

Published: Oct. 24, 2024

Perovskite solar cells (PSCs) suffer from a quick efficiency drop after fabrication, partly due to surface defects, and can be further enhanced with the passivation of defects. Herein, is reviewed as method improve both stability PSCs, an emphasis on chemical mechanism passivation. Various molecules are utilized passivants, such halides, Lewis acids bases, amines (some result in low-dimensional perovskite), polymers. Multifunctional promising group they capable passivating multiple defects various functional groups. This review categorizes these addition considering potential limitations each type passivant. Additionally, passivants for Sn-based PSCs discussed since this has poor photovoltaic performance compared their lead-based counterpart severe Lastly, future perspectives usage addressed provide direction upcoming research practical applications.

Language: Английский

Citations

3
Energy Level Alignment Regulation and Carrier Management in Perovskite Solar Cells with Various Bandgaps Using Tailored Metal‐Organic Frameworks DOI
Bo Xiao, Wenguang Zhang,

Yuchen Xiong

et al.

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

Published: Nov. 21, 2024

Abstract The interface energy level alignment modulation and charge carrier transportation play an important role in the device performance of perovskite solar cells (PSCs). Herein, tailored hydrophobic metal‐organic frameworks (MOFs) are employed as interfacial layers between absorbers hole transport (HTLs). MOFs feature abundant carboxylic acid groups capable bonding with Pb 2+ organic cations, which can effectively passivate defects suppress non‐radiative recombination. Meanwhile, MOF optimized HTL, further facilitating transportation. Specifically, CsFAMA‐based PSCs a bandgap 1.63 eV attained power conversion efficiency (PCE) 23.06% upon modification MOFs. Additionally, MOFs‐treated FA‐based 1.55 achieved remarkable PCE 24.81%, accompanied by outstanding fill factor 84.3% minimal open‐circuit voltage loss merely 0.386 V. Furthermore, integration layer substantially improved moisture stability PSCs. unencapsulated CsFAMA modified retained 91.2% their initial after 2500 h aging under ambient conditions 40% relative humidity (RH). This work underpins commercialization diverse bandgaps.

Language: Английский

Citations

2