Effect of Guanidinium Salt for Stress‐Relaxation and Interfacial Engineering in Antisolvent Free Perovskite Solar Cells Fabricated Under Air Ambient DOI
Shivam Porwal, Nitin Bansal, Gyeong Chan Kim

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 13, 2024

Abstract In perovskite solar cells, the presence of stress and defects at interfaces promotes performance degradation poor stability devices. The formation these is more prominent in two‐step antisolvent‐free film fabrication. This study addresses challenges by introducing guanidine sulfate (Gua‐S) tin oxide/formamidinium lead iodide interface, fabricated without antisolvent under ambient air. Interfacial Gua‐S enhanced morphology forming bonds between uncoordinated Pb 2+ ions I − vacancies interface showed improvement crystallinity quality film. Microstructural analysis indicated a substantial reduction stress, decreasing from 50.6 to 20.72 MPa with application Gua‐S. Moreover, treated cells significant improvements achieved an open circuit voltage 1.08 V 22.34% efficiency. Further, electrochemical impedance spectroscopic improved built‐in potential, carrier lifetime, charge recombination lifetime for devices retained over 87% initial power conversion efficiency after 2000 hours operation. comprehensive fundamental issues interfacial demonstrates efficacy salt enhancing both structural functional aspects device fabrication process.

Language: Английский

Buried Interface Passivation with 3,4,5-Trifluorophenylboronic Acid Enables Efficient and Stable Inverted Perovskite Solar Cells DOI
Jiansheng Yang, Zhenhua Zhao, Changzeng Ding

et al.

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

Published: March 7, 2025

The p-i-n type perovskite solar cells with a nickel oxide (NiOx) hole transport layer in combination self-assembled monolayers (SAMs) have high power conversion efficiency (PCE) of over 26%. surface properties the SAM significant impact on growth and crystallization film. In meanwhile, defects formed during thermal annealing at interface would act as charge recombination centers, decreasing device performance stability. To address these issues, this work introduces 3,4,5-trifluorophenylboronic acid (3,4,5-3FPBA) interfacial modification to improve buried that enable better With 3,4,5-3FPBA layer, based composition Cs0.05(FA0.98MA0.02)0.95Pb(I0.95Br0.05)3, increased from 21.99% 24.02%. A similar improvement was observed for Cs0.05FA0.82MA0.13Pb(I0.85Br0.15)3, where 21.87% 22.76%. universality has been confirmed. addition, resulting showed improved stability, maintaining 75% its initial after 500 h continuous heating 85 °C unencapsulated devices.

Language: Английский

Citations

1
Peering into interfaces in perovskite solar cells: A first-principles perspective DOI

Xiang-lin LIU,

Jinshan Li, Xie Zhang

et al.

Journal of Physics Condensed Matter, Journal Year: 2025, Volume and Issue: 37(15), P. 151502 - 151502

Published: Feb. 24, 2025

Over the past decade, perovskite solar cells (PSCs) have experienced a rapid development. The remarkable increase in photoelectric conversion efficiency demonstrates great promise of halide perovskites field photovoltaics. Despite excellent photovoltaic performance, further efforts are needed to enhance and stability. Interfacial engineering plays crucial role enhancing stability PSCs, enabling champion sustain power above 26% for over 1000 h. As powerful theoretical tool characterizing interfaces first-principles calculations contributed understanding interfacial properties guiding materials design. In this Perspective, we highlight recent progress theoretically profiling between other materials, focusing on effects energy band alignment electronic structure carrier transport at interfaces. These help reveal atomic interfaces, provide important guidance experimental research device optimization. We also analyze potential strategies separation discuss challenges accurate modeling which will understand fundamental physics PSCs guide their

Language: Английский

Citations

0
Additive strategy toward PbI2 film modifications for efficient perovskite solar cells fabricated in an air environment DOI
Xiuzhen Zhang,

Xiyu Wang,

Xiaohuan Zhang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163006 - 163006

Published: April 1, 2025

Language: Английский

Citations

0
Enhancing the Efficiency and Stability of CsFA‐Based Perovskite Solar Cells: Defect Passivation Using Indoline‐Based D–π–A Configured Molecule as Additive DOI

Zaixin Zhang,

Yongjie Cui, G. Chen

et al.

Progress in Photovoltaics Research and Applications, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

ABSTRACT The employment of rationally designed functional group‐bearing molecules as additives to passivate perovskite defects has emerged a prevalent trend. Among the diverse array passivation materials, donor‐π‐acceptor (D‐π‐A) structured have attracted widespread attention due their unique ability simultaneously regulate electron donor and acceptor units, thereby promoting coordination with undercoordinated ions films. In this work, we introduce an indoline‐based D‐π‐A molecule (labeled IHT) efficient passivator for solar cells (PSCs). extraordinary electron‐donating capability indoline moiety endows electron‐withdrawing cyanoacetic acid group elevated density, which is in favor interaction under‐coordinated Pb 2+ lattice, thus reducing density defective states within Experimental outcomes underscore efficacy IHT additive passivating CsFA‐based PSCs. optimal devices demonstrate remarkable champion photovoltaic conversion efficiency 21.25%, notable improvement 7.4% compared Cs‐FA‐PbI 3 devices. stability assessments reveal that unencapsulated IHT‐treated retained 83% initial after 30 days ambient air, whereas untreated exhibited decline 54% under same condition. This work indicates profound significance formation dense film effect well enhancing long‐term

Language: Английский

Citations

0
Effect of Guanidinium Salt for Stress‐Relaxation and Interfacial Engineering in Antisolvent Free Perovskite Solar Cells Fabricated Under Air Ambient DOI
Shivam Porwal, Nitin Bansal, Gyeong Chan Kim

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 13, 2024

Abstract In perovskite solar cells, the presence of stress and defects at interfaces promotes performance degradation poor stability devices. The formation these is more prominent in two‐step antisolvent‐free film fabrication. This study addresses challenges by introducing guanidine sulfate (Gua‐S) tin oxide/formamidinium lead iodide interface, fabricated without antisolvent under ambient air. Interfacial Gua‐S enhanced morphology forming bonds between uncoordinated Pb 2+ ions I − vacancies interface showed improvement crystallinity quality film. Microstructural analysis indicated a substantial reduction stress, decreasing from 50.6 to 20.72 MPa with application Gua‐S. Moreover, treated cells significant improvements achieved an open circuit voltage 1.08 V 22.34% efficiency. Further, electrochemical impedance spectroscopic improved built‐in potential, carrier lifetime, charge recombination lifetime for devices retained over 87% initial power conversion efficiency after 2000 hours operation. comprehensive fundamental issues interfacial demonstrates efficacy salt enhancing both structural functional aspects device fabrication process.

Language: Английский

Citations

0