Constructing Type-II Band Alignment of 3D/2D Heterojunction for Improved Carrier Transport in Carbon-Based Perovskite Solar Cells

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

Published: April 6, 2025

High defect density and low stability remain significant obstacles in the development of efficient stable 3D perovskite solar cells (PSCs), while 3D/2D hybrid PSCs have emerged as promising candidates due to their excellent environmental tolerance. However, performance might be further limited by carrier transport within films caused quasi-2D phases with multiple n-values. Herein, precrystallized 2D phenylethylamine lead iodide (PEA2PbI4) crystals methylammonium chloride (MACl) were introduced into bulk phase (MAPbI3) improve crystal quality growth orientation. During film formation process, PEA2PbI4 delayed nucleation formed a mixed film. The as-formed type-II band alignment 2D/3D heterojunction restricts movement charge carriers lattice, avoiding risk being trapped defects at grain boundaries. Additionally, MACl facilitates vertical growth, enlarging size thickness films. Under combined effect MACl, power conversion efficiency (PCE) carbon-based increased from 10.53% 16.07%. unpackaged devices retained 90% initial PCE after storage for 30 days room temperature 40% relative humidity. These findings not only provide facile way tuning passivation dimensional perovskites, but also give new insights constructing types PSCs.

Language: Английский

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Natural Polyphenol-Assisted Dispersing Liquid Metal/Carbon Composite Electrode for the Superior Interface in Carbon-Based Perovskite Solar Cells

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Carbon-based perovskite solar cells (PSCs) present lower power conversion efficiency (PCE) compared with that of metal-based PSCs. One the main reasons is limited conductivity carbon materials. Liquid metals (LMs) good fluidity and excellent can be applied as superior electrode materials for a broad range applications. Herein, LMs are combined slurry to improve their enhance interfacial contact high photovoltaic performance carbon-based In order well disperse avoid aggregation, three natural polyphenols, namely, gallic acid (GA), tannic (TA), tea polyphenols (TP), different molecular structures adopted Gallium nanoparticles (Ga NPs) form an encapsulation layer. As novel surfactant, TP molecule moderate numbers hydroxyl groups steric hindrance presents best property Ga NPs among these polyphenols. It tightly bind Ga3+ core-shell structure on surface NPs. Its durable outer shell, around 11 nm, enables TP@Ga have structural stability, effectively inhibiting invasion water oxygen, even after 10 days. With optimal mass ratio (1:40), C-PSCs based TP@Ga40/C achieve champion PCE 16.58%, significantly higher than control devices (13.27%). addition, long-term stability has also been increased, being stored at room temperature relative humidity 35% 35 days, remain above 85% initial PCE. This work proposes new method by surfactants explores its promising application improving

Language: Английский

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Recent research trends in inorganic charge transport materials for next-generation perovskite solar cells

Renewable and Sustainable Energy Reviews, Journal Year: 2025, Volume and Issue: 219, P. 115835 - 115835

Published: May 15, 2025

Language: Английский

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