Surface reaction for efficient and stable inverted perovskite solar cells

Nature, Journal Year: 2022, Volume and Issue: 611(7935), P. 278 - 283

Published: Sept. 1, 2022

Language: Английский

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Minimizing buried interfacial defects for efficient inverted perovskite solar cells

Science, Journal Year: 2023, Volume and Issue: 380(6643), P. 404 - 409

Published: April 27, 2023

Controlling the perovskite morphology and defects at buried perovskite-substrate interface is challenging for inverted solar cells. In this work, we report an amphiphilic molecular hole transporter, (2-(4-(bis(4-methoxyphenyl)amino)phenyl)-1-cyanovinyl)phosphonic acid, that features a multifunctional cyanovinyl phosphonic acid group forms superwetting underlayer deposition, which enables high-quality films with minimized interface. The resulting film has photoluminescence quantum yield of 17% Shockley-Read-Hall lifetime nearly 7 microseconds achieved certified power conversion efficiency (PCE) 25.4% open-circuit voltage 1.21 volts fill factor 84.7%. addition, 1-square centimeter cells 10-square minimodules show PCEs 23.4 22.0%, respectively. Encapsulated modules exhibited high stability under both operational damp heat test conditions.

Language: Английский

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Rational design of Lewis base molecules for stable and efficient inverted perovskite solar cells

Science, Journal Year: 2023, Volume and Issue: 379(6633), P. 690 - 694

Published: Feb. 16, 2023

Lewis base molecules that bind undercoordinated lead atoms at interfaces and grain boundaries (GBs) are known to enhance the durability of metal halide perovskite solar cells (PSCs). Using density functional theory calculations, we found phosphine-containing have strongest binding energy among members a library studied herein. Experimentally, best inverted PSC treated with 1,3-bis(diphenylphosphino)propane (DPPP), diphosphine passivates, binds, bridges GBs, retained power conversion efficiency (PCE) slightly higher than its initial PCE ~23% after continuous operation under simulated AM1.5 illumination maximum point ~40°C for >3500 hours. DPPP-treated devices showed similar increase in being kept open-circuit conditions 85°C >1500

Language: Английский

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All-perovskite tandem solar cells with 3D/3D bilayer perovskite heterojunction

Nature, Journal Year: 2023, Volume and Issue: 620(7976), P. 994 - 1000

Published: June 8, 2023

Language: Английский

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Reducing nonradiative recombination in perovskite solar cells with a porous insulator contact

Science, Journal Year: 2023, Volume and Issue: 379(6633), P. 683 - 690

Published: Feb. 16, 2023

Inserting an ultrathin low-conductivity interlayer between the absorber and transport layer has emerged as important strategy for reducing surface recombination in best perovskite solar cells. However, a challenge with this approach is trade-off open-circuit voltage (Voc) fill factor (FF). Here, we overcame by introducing thick (about 100 nanometers) insulator random nanoscale openings. We performed drift-diffusion simulations cells porous contact (PIC) realized it using solution process controlling growth mode of alumina nanoplates. Leveraging PIC approximately 25% reduced area, achieved efficiency up to 25.5% (certified steady-state 24.7%) p-i-n devices. The product Voc × FF was 87.9% Shockley-Queisser limit. velocity at p-type from 64.2 9.2 centimeters per second. bulk lifetime increased 1.2 6.0 microseconds because improvements crystallinity. improved wettability precursor allowed us demonstrate 23.3% efficient 1-square-centimeter cell. here its broad applicability different contacts compositions.

Language: Английский

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Molecular engineering of contact interfaces for high-performance perovskite solar cells

Nature Reviews Materials, Journal Year: 2022, Volume and Issue: 8(2), P. 89 - 108

Published: Nov. 4, 2022

Language: Английский

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Highly efficient p-i-n perovskite solar cells that endure temperature variations

Science, Journal Year: 2023, Volume and Issue: 379(6630), P. 399 - 403

Published: Jan. 26, 2023

Daily temperature variations induce phase transitions and lattice strains in halide perovskites, challenging their stability solar cells. We stabilized the perovskite black improved cell performance using ordered dipolar structure of β-poly(1,1-difluoroethylene) to control film crystallization energy alignment. demonstrated p-i-n cells with a record power conversion efficiency 24.6% over 18 square millimeters 23.1% 1 centimeter, which retained 96 88% after 1000 hours 1-sun maximum point tracking at 25° 75°C, respectively. Devices under rapid thermal cycling between -60° +80°C showed no sign fatigue, demonstrating impact on operational

Language: Английский

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Deterministic fabrication of 3D/2D perovskite bilayer stacks for durable and efficient solar cells

Science, Journal Year: 2022, Volume and Issue: 377(6613), P. 1425 - 1430

Published: Sept. 22, 2022

Realizing solution-processed heterostructures is a long-enduring challenge in halide perovskites because of solvent incompatibilities that disrupt the underlying layer. By leveraging dielectric constant and Gutmann donor number, we could grow phase-pure two-dimensional (2D) perovskite stacks desired composition, thickness, bandgap onto 3D without dissolving substrate. Characterization reveals 3D-2D transition region 20 nanometers mainly determined by roughness bottom Thickness dependence 2D layer anticipated trends for n-i-p p-i-n architectures, which consistent with band alignment carrier transport limits perovskites. We measured photovoltaic efficiency 24.5%, exceptional stability T99 (time required to preserve 99% initial efficiency) >2000 hours, implying 3D/2D bilayer inherits intrinsic durability compromising efficiency.

Language: Английский

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Stabilized hole-selective layer for high-performance inverted p-i-n perovskite solar cells

Science, Journal Year: 2023, Volume and Issue: 382(6668), P. 284 - 289

Published: Oct. 19, 2023

P-i-n geometry perovskite solar cells (PSCs) offer simplified fabrication, greater amenability to charge extraction layers, and low-temperature processing over n-i-p counterparts. Self-assembled monolayers (SAMs) can enhance the performance of p-i-n PSCs but ultrathin SAMs be thermally unstable. We report a robust hole-selective layer comprised nickel oxide (NiOx) nanoparticle film with surface-anchored (4-(3,11-dimethoxy-7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (MeO-4PADBC) SAM that improve stabilize NiOx/perovskite interface. The energetic alignment favorable contact binding between NiOx/MeO-4PADBC reduced voltage deficit various compositions led strong interface toughening effects under thermal stress. resulting 1.53-electron-volt devices achieved 25.6% certified power conversion efficiency maintained >90% their initial after continuously operating at 65 degrees Celsius for 1200 hours 1-sun illumination.

Language: Английский

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Long-term operating stability in perovskite photovoltaics

Nature Reviews Materials, Journal Year: 2023, Volume and Issue: 8(9), P. 569 - 586

Published: Aug. 4, 2023

Language: Английский

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