Metal halide perovskites for light-emitting diodes

Nature Materials, Год журнала: 2020, Номер 20(1), С. 10 - 21

Опубликована: Сен. 14, 2020

Язык: Английский

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Constructive molecular configurations for surface-defect passivation of perovskite photovoltaics

Science, Год журнала: 2019, Номер 366(6472), С. 1509 - 1513

Опубликована: Дек. 20, 2019

Surface trap-mediated nonradiative charge recombination is a major limit to achieving high-efficiency metal-halide perovskite photovoltaics. The ionic character of lattice has enabled molecular defect passivation approaches through interaction between functional groups and defects. However, lack in-depth understanding how the configuration influences effectiveness challenge rational molecule design. Here, chemical environment group that activated for was systematically investigated with theophylline, caffeine, theobromine. When N-H C=O were in an optimal molecule, hydrogen-bond formation I (iodine) assisted primary binding antisite Pb (lead) maximize surface-defect binding. A stabilized power conversion efficiency 22.6% photovoltaic device demonstrated theophylline treatment.

Язык: Английский

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Minimizing non-radiative recombination losses in perovskite solar cells

Nature Reviews Materials, Год журнала: 2019, Номер 5(1), С. 44 - 60

Опубликована: Ноя. 19, 2019

Язык: Английский

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All-perovskite tandem solar cells with improved grain surface passivation

Nature, Год журнала: 2022, Номер 603(7899), С. 73 - 78

Опубликована: Янв. 17, 2022

Язык: Английский

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Additive Engineering for Efficient and Stable Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2019, Номер 10(13)

Опубликована: Окт. 4, 2019

Abstract Perovskite solar cells (PSCs) have reached a certified 25.2% efficiency in 2019 due to their high absorption coefficient, carrier mobility, long diffusion length, and tunable direct bandgap. However, the nature of solution processing rapid crystal growth perovskite thin films, variety defects can form as result precursor compositions conditions. The use additives affect crystallization film formation, defect passivation bulk and/or at surface, well influence interface tuning structure energetics. Here, recent progress additive engineering during formation is discussed according following common categories: Lewis acid (e.g., metal cations, fullerene derivatives), base based on donor type O‐donor, S‐donor, N‐donor), ammonium salts, low‐dimensional perovskites, ionic liquid. Various additive‐assisted strategies for optimization are then summarized; include modifiers improve electron‐ hole‐transport layers those modify surface properties. Finally, an outlook provided research trends with respect PSC development.

Язык: Английский

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Recent Progresses on Defect Passivation toward Efficient Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2019, Номер 10(13)

Опубликована: Окт. 14, 2019

Abstract The disorderly distribution of defects in the perovskite or at grain boundaries, surfaces, and interfaces, which seriously affect carrier transport through formation nonradiative recombination centers, hinders further improvement on power conversion efficiency (PCE) solar cells (PSCs). Several defect passivation strategies have been confirmed as an efficient approach for promoting performance PSCs. Herein, recent progress toward are summarized, a classification common that elaborate mechanism according to location type agent is presented. Finally, this review offers likely prospects future trends development strategies.

Язык: Английский

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All-perovskite tandem solar cells with 24.2% certified efficiency and area over 1 cm2 using surface-anchoring zwitterionic antioxidant

Nature Energy, Год журнала: 2020, Номер 5(11), С. 870 - 880

Опубликована: Окт. 5, 2020

Язык: Английский

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Stabilizing perovskite-substrate interfaces for high-performance perovskite modules

Science, Год журнала: 2021, Номер 373(6557), С. 902 - 907

Опубликована: Авг. 19, 2021

The interfaces of perovskite solar cells (PSCs) are important in determining their efficiency and stability, but the morphology stability imbedded perovskite-substrate have received less attention than top interfaces. We found that dimethyl sulfoxide (DMSO), which is a liquid additive broadly applied to enhance film morphology, was trapped during formation led voids at accelerated degradation under illumination. Partial replacement DMSO with solid-state carbohydrazide reduces interfacial voids. A maximum stabilized power conversion (PCE) 23.6% realized for blade-coated p-type/intrinsic/n-type (p-i-n) structure PSCs no loss after 550-hour operational tests 60°C. mini-modules showed certified PCEs 19.3 19.2%, aperture areas 18.1 50.0 square centimeters, respectively.

Язык: Английский

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Advances in two-dimensional organic–inorganic hybrid perovskites

Energy & Environmental Science, Год журнала: 2020, Номер 13(4), С. 1154 - 1186

Опубликована: Янв. 1, 2020

Recent achievements of 2D perovskites for various optoelectronic applications along with their basic properties and future opportunities are discussed.

Язык: Английский

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Regulating Surface Termination for Efficient Inverted Perovskite Solar Cells with Greater Than 23% Efficiency

Journal of the American Chemical Society, Год журнала: 2020, Номер 142(47), С. 20134 - 20142

Опубликована: Ноя. 16, 2020

Passivating surface and bulk defects of perovskite films has been proven to be an effective way minimize nonradiative recombination losses in solar cells (PVSCs). The lattice interference perturbation atomic periodicity at the surfaces often significantly affect material properties device efficiencies. By tailoring terminal groups on modifying chemical environment, can reduced enhance photovoltaic performance stability derived PVSCs. Here, we report a rationally designed bifunctional molecule, piperazinium iodide (PI), containing both R2NH R2NH2+ same six-membered ring, behaving as electron donor acceptor react with different surface-terminating ends films. resulting after defect passivation show released residual stress, suppressed loss, more n-type characteristics for sufficient energy transfer. Consequently, charge is result high open-circuit voltage (VOC) 1.17 V VOC loss 0.33 V. A very power conversion efficiency (PCE) 23.37% (with 22.75% certified) could achieved, which highest value reported inverted Our work reveals using molecules simultaneously stability.

Язык: Английский

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