Covalent triazine reducing the defects by coordination roles and inhibiting I− migration by anion-π interaction for efficient perovskite solar cell

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148643 - 148643

Published: Jan. 14, 2024

Language: Английский

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Defect Engineering at Buried Interface of Perovskite Solar Cells

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

Published: June 21, 2024

Abstract Perovskite solar cells (PSC) have developed rapidly since the past decade with aim to produce highly efficient photovoltaic technology at a low cost. Recently, physical and chemical defects buried interface of PSC including vacancies, impurities, lattice strain, voids are identified as next formidable hurdle further advancement performance devices. The presence these has unfavorably impacted many optoelectronic properties in PSC, such band alignment, charge extraction/recombination dynamics, ion migration behavior, hydrophobicity. Herein, broad but critical discussion on various essential aspects related is provided. In particular, existing surface underlying transporting layer (CTL) bottom perovskite film initially elaborated. situ ex characterization approaches adopted unveil hidden elucidated determine their influence efficiency, operational stability, photocurrent–voltage hysteresis PSC. A myriad innovative strategies defect management CTL, introduction passivation materials, strain engineering, morphological control used address also systematically catalyze development more efficient, reliable, commercially viable

Language: Английский

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Stable perovskite solar cells with 22% efficiency enabled by inhibiting migration/loss of iodide ions

Physical Chemistry Chemical Physics, Journal Year: 2023, Volume and Issue: 25(9), P. 6955 - 6962

Published: Jan. 1, 2023

Iodide ions (I- and I3-) in perovskites tend to migrate resulting phase segregation degradation of perovskite films devices under illumination or operation conditions. In order overcome this intrinsic difficulty, passivation additive strategies have been developed many studies. work, we introduced polyetheramine (PEA) into inhibit the migration loss iodides suppress defects related these migrated ions. The with PEA barely suffered iodide even long-term ultraviolet (UV) possessed a lower trap density than that pristine before after aging UV illumination. Density functional theory (DFT) calculations revealed can form strong interactions Pb2+ via PbO H-I bonds, could be locked firmly by PEA, preventing them from loss. Using method, efficiency solar cells (PSCs) improved 19.71% (without PEA) 22.02% (with PEA). After 200 h maximum power point (MPP) tracking, PSCs remained 89% its initial value without fully degraded.

Language: Английский

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Polydentate Ligand Reinforced Chelating to Stabilize Buried Interface toward High‐Performance Perovskite Solar Cells

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(8)

Published: Jan. 5, 2024

Abstract The instability of the buried interface poses a serious challenge for commercializing perovskite photovoltaic technology. Herein, we report polydentate ligand reinforced chelating strategy to strengthen stability by managing interfacial defects and stress. bis(2,2,2‐trifluoroethyl) (methoxycarbonylmethyl)phosphonate (BTP) is employed manipulate interface. C=O, P=O two −CF 3 functional groups in BTP synergistically passivate from surface SnO 2 bottom layer. Moreover, modification contributes mitigated residual tensile stress, promoted crystallization, reduced energy barrier. multidentate modulation appropriate different compositions. Due much nonradiative recombination heightened contact, device with yields promising power conversion efficiency (PCE) 24.63 %, which one highest efficiencies ever reported devices fabricated air environment. unencapsulated BTP‐modified degrade 98.6 % 84.2 their initial PCE values after over 3000 h aging ambient environment 1728 thermal respectively. This work provides insights into strengthening engineering molecules.

Language: Английский

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In-situ solution Fe-doping: A versatile pathway to significantly enhance charge separation in CuBi2O4 photocathodes

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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