Suppressed recombination for monolithic inorganic perovskite/silicon tandem solar cells with an approximate efficiency of 23%

eScience, Journal Year: 2022, Volume and Issue: 2(3), P. 339 - 346

Published: April 19, 2022

Potentially temperature-resistant inorganic perovskite/silicon tandem solar cells (TSCs) are promising devices for boosting efficiency past the single-junction silicon limit. However, undesirable non-radiative recombination generally leads to a significant voltage deficit. Here, we introduce an effective strategy using nickel iodide, halide salt, passivate iodine vacancies and suppress recombination. NiI2-treated CsPbI3-xBrx perovskite with 1.80 ​eV bandgap exhibited of 19.53% 1.36 ​V, corresponding deficit 0.44 ​V. Importantly, treated device demonstrated excellent operational stability, maintaining 95.7% its initial after maximum power point tracking 300 ​h under continuous illumination in N2 atmosphere. By combining this top cell narrower bottom cell, first time achieved monolithic TSCs, which 22.95% open-circuit 2.04 This work provides passivation materials achieve efficient stable cells.

Language: Английский

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Efficient Wide-Bandgap Mixed-Cation and Mixed-Halide Perovskite Solar Cells by Vacuum Deposition

ACS Energy Letters, Journal Year: 2021, Volume and Issue: 6(2), P. 827 - 836

Published: Feb. 3, 2021

Vacuum deposition methods are increasingly applied to the preparation of perovskite films and devices, in view possibility prepare multilayer structures at low temperature. Vacuum-deposited, wide-bandgap solar cells based on mixed-cation mixed-anion perovskites have been scarcely reported, due challenges associated with multiple-source processing thin films. In this work, we describe a four-source vacuum process type FA1–nCsnPb(I1–xBrx)3 tunable bandgap controlled morphology, using FAI, CsI, PbI2, PbBr2 as precursors. The simultaneous sublimation PbI2 allows relative Br/Cs content be decoupled controlled, resulting homogeneous 1.7–1.8 eV range no detectable halide segregation. Solar 1.75 show efficiency up 16.8% promising stability, maintaining 90% initial after 2 weeks operation.

Language: Английский

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Insights into the Development of Monolithic Perovskite/Silicon Tandem Solar Cells

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 12(4)

Published: May 14, 2021

Abstract In recent years, perovskite/silicon tandem solar cells (PK/c‐Si tandem) have demonstrated high power conversion efficiency (PCE) and great application potential in photovoltaic (PV) systems. However, the PCE of PK/c‐Si devices is still below theoretical limit. From a broader perspective, their poor stability difficulty large‐area realization are crucial barriers for commercial viability. this report, detailed constraints facing corresponding solutions discussed. The authors propose that main obstacle comes from limitation perovskite top cell. careful understanding optical electrical properties each functional layer expected to be core process further promote efficiency. Regarding environmental intrinsic instability issues, encapsulation considered most effective method address instability. Preventing ion migration one fundamental methods eliminate It believed low dimensional materials will become competitive solution simultaneously solve these two instabilities. Finally, some suggestions reducing costs preparation on large‐scale also discussed which provides guidance boosting development tandem.

Language: Английский

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Synergy of 3D and 2D Perovskites for Durable, Efficient Solar Cells and Beyond

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(15), P. 9565 - 9652

Published: July 10, 2023

Three-dimensional (3D) organic-inorganic lead halide perovskites have emerged in the past few years as a promising material for low-cost, high-efficiency optoelectronic devices. Spurred by this recent interest, several subclasses of such two-dimensional (2D) begun to play significant role advancing fundamental understanding structural, chemical, and physical properties perovskites, which are technologically relevant. While chemistry these 2D materials is similar that 3D their layered structure with hybrid interface induces new emergent can significantly or sometimes subtly be important. Synergistic realized systems combine different exhibiting dimensionalities exploiting intrinsic compatibility. In many cases, weaknesses each alleviated heteroarchitectures. For example, 3D-2D demonstrate novel behavior neither would capable separately. This review describes how structural differences between give rise disparate properties, discusses strategies realizing mixed-dimensional various architectures through solution-processing techniques, presents comprehensive outlook use solar cells. Finally, we investigate applications beyond photovoltaics offer our perspective on perovskite semiconductor unrivaled tunability, efficiency, relevant durability.

Language: Английский

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Downward Homogenized Crystallization for Inverted Wide‐Bandgap Mixed‐Halide Perovskite Solar Cells with 21% Efficiency and Suppressed Photo‐Induced Halide Segregation

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(29)

Published: April 24, 2022

Abstract Mixed‐halide perovskite has an irreplaceable role as wide‐bandgap absorber in multi‐junction tandem solar cells. However, large open‐circuit voltage ( V oc ) loss due to non‐uniform halide distribution and compromised device stability photo‐induced segregation significantly limited the applications. Here, it is introduced 4‐(2‐aminoethyl)‐benzenesulfonyl fluoride hydrochloride (ABF) with multifunctional groups (sulfonyl, ammonium, fluoride) mixed‐halide precursor demonstrate a downward homogenized crystallization strategy for suppressing initial vertical phase separation during reducing loss. Furthermore, strong electronegativity effectively fixes anions cations, while sulfonyl ammonium are used passivate positive charged (halide vacancies) negative (FA/MA defects, respectively, thereby generation of ion vacancies that lead subsequent segregation. As result, 1.63 1.68 eV cells inverted structures exhibit champion power conversion efficiency (PCE) 21.76% 20.11% 1.18 1.21 V, respectively. Most importantly, optimized devices without encapsulation preserve 86% after 240 h continuous illumination under AM 1.5G, showing excellent light stability. Thus, provides highly efficient performance future cell

Language: Английский

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