Minimized Energy Loss at the Buried Interface of p‐i‐n Perovskite Solar Cells via Accelerating Charge Transfer and Forming p–n Homojunction

Advanced Energy Materials, Год журнала: 2023, Номер 13(19)

Опубликована: Апрель 7, 2023

Abstract The energy loss ( E ) aroused by inefficient charge transfer and large level offset at the buried interface of p‐i‐n perovskite solar cells (PVSCs) limits their development. In this work, a BF 4 − anion‐assisted molecular doping (AMD) strategy is first proposed to improve capability hole transport layers (HTLs) reduce PVSCs. AMD improves carrier mobility density poly[bis(4‐phenyl) (2,4,6‐trimethylphenyl) amine] (PTAA) poly[ N , ′‐bis(4‐butilphenyl)‐ ′‐bis(phenyl)‐benzidine] (Poly‐TPD) HTLs while lowering Fermi levels. Meanwhile, BF4− anions regulate crystallization donor‐type iodine vacancies, resulting in energetics transformation from n‐type p‐type on bottom surface film. faster formed p–n homojunction recombination HTL/perovskite interface. PVSCs utilizing treated PTAA Poly‐TPD as demonstrate highest power conversion efficiency (PCE) 24.26% 22.65%, along with retaining 90.97% 85.95% initial PCE after maximum point tracking for 400 h. This work provides an effective way minimize accelerating forming homojunctions.

Язык: Английский

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24.96%‐Efficiency FACsPbI₃ Perovskite Solar Cells Enabled by an Asymmetric 1,3‐Thiazole‐2,4‐Diammonium

Advanced Energy Materials, Год журнала: 2023, Номер 13(15)

Опубликована: Март 1, 2023

Abstract Surmounting complicated defects at the electron transport layer (ETL) and perovskite interface plays a non‐trivial role in improving efficiency stability of solar cells (PSCs). Herein, an asymmetric modification strategy (AIMS) is developed to passivate from both SnO 2 ETL buried surface via incorporating 1,3‐thiazole‐2,4‐diammonium (TDA) into /perovskite interface. Detailed experimental calculated results demonstrate that N3 (the nitrogen atom bonding imine) TDA preferentially cures free hydroxyl (OH), oxygen vacancy ( V O ), Sn‐related on surface, while N1 vinyl) more inclined Pb 2+ I − related surface. As result, TDA‐modified FACsPbI 3 PSC yields champion power conversion (PCE) 24.96% with gratifying open‐circuit voltage oc ) 1.20 V. In addition, optimized PSCs exhibit charming air‐operational unencapsulated device sustaining 97.04% its initial PCE after storage air conditions for 1400 h. The encapsulated maintains 90.21% maximum point tracking 500

Язык: Английский

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Highly‐Stable CsPbI₃ Perovskite Solar Cells with an Efficiency of 21.11% via Fluorinated 4‐Amino‐Benzoate Cesium Bifacial Passivation

Advanced Functional Materials, Год журнала: 2023, Номер 33(44)

Опубликована: Июль 7, 2023

Abstract The poor interface quality between cesium lead triiodide (CsPbI 3 ) perovskite and the electron transport layer limits stability efficiency of CsPbI solar cells (PSCs). Herein, a 4‐amino‐2,3,5,6‐tetrafluorobenzoate (ATFC) is designed as bifacial defect passivator to tailor perovskite/TiO 2 interface. comprehensive experiments demonstrate that ATFC can not only optimize conductivity, mobility, energy band structure TiO by passivation undercoordinated Ti 4+ , oxygen vacancy ( V O ), free OH defects but also promote yield high‐quality film synergistic Pb 2+ with CO group F atom, limiting I − migration via F···I interaction. Benefiting from above interactions, ATFC‐modified device yields champion power conversion (PCE) 21.11% an excellent open‐circuit voltage OC 1.24 V. Meanwhile, optimized PSC maintains 92.74% its initial after aging 800 h in air atmosphere, has almost no attenuation tracking at maximum point for 350 h.

Язык: Английский

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Surface Cleaning and Passivation Strategy for Durable Inverted Formamidinium–Cesium Triiodide Perovskite Solar Cells

Advanced Energy Materials, Год журнала: 2023, Номер 13(43)

Опубликована: Окт. 3, 2023

Abstract Formamidinium‐cesium triiodide (FA x Cs 1‐x PbI 3 ) perovskite exhibits excellent phase stability, making it the most promising candidate for commercial solar cell (PSC) applications, particularly those with inverted structures present a contribution to field of production. However, this composition often forms small grain sizes and has large number defects 2 residues on its surface, which can damage device performance. In study, post‐surface engineering strategy called “clean‐passivation” method is proposed address interfacial problem between electron transport layer (ETL). This significantly reduces surface boundary eliminates unreacted , resulting in suppressed iodine decomposition ion migration during operation. As result, an power conversion efficiency 24.27% superior stability achieved, as unencapsulated maintains 97.12% initial after 1500 h continuous light soaking. Furthermore, new clean‐passivate be universally applied other typical compositions.

Язык: Английский

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Dual-interface engineering induced by silane coupling agents with different functional groups constructing high-performance flexible perovskite solar cells

Chemical Engineering Journal, Год журнала: 2023, Номер 469, С. 143790 - 143790

Опубликована: Май 27, 2023

Язык: Английский

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Ionic Liquid Bridge Assisting Bifacial Defect Passivation for Efficient All-Inorganic Perovskite Cells with High Open-Circuit Voltage

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(6), С. 7297 - 7309

Опубликована: Фев. 2, 2024

Serious open-circuit voltage (Voc) loss originating from nonradiative recombination and mismatch energy level at TiO2/perovskite buried interface dramatically limits the photovoltaic performance of all-inorganic CsPbIxBr3-x (x = 1, 2) perovskite solar cells (PSCs) fabricated through low-temperature methods. Here, an ionic liquid (IL) bridge is constructed by introducing 1-butyl-3-methylimidazolium acetate (BMIMAc) IL to treat interface, bilaterally passivate defects modulate alignment. Therefore, Voc CsPbIBr2 PSCs modified BMIMAc (Target-1) significantly increases 148 mV (from 1.213 1.361 V), resulting in efficiency increasing 10.30% 7.87%. Unsealed Target-1 show outstanding long-term thermal stability. During accelerated degradation process (85 °C, RH: 50∼60%), achieve a champion PCE 11.94% with remarkable 1.403 V, while control PSC yields promising 10.18% 1.319 V. In particular, V highest reported so far carbon-electrode-based PSCs. Moreover, this strategy enables CsPbI2Br 1.295 15.20%, which close 15.48% for prepared process. This study provides simple assist bifacial defect passivation elevate

Язык: Английский

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Stabilization of halide perovskites with silicon compounds for optoelectronic, catalytic, and bioimaging applications

InfoMat, Год журнала: 2024, Номер 6(12)

Опубликована: Май 26, 2024

Abstract Silicon belongs to group 14 elements along with carbon, germanium, tin, and lead in the periodic table. Similar silicon is capable of forming a wide range stable compounds, including hydrides, organosilicons, silicic acids, oxides, silicone polymers. These materials have been used extensively optoelectronic devices, sensing, catalysis, biomedical applications. In recent years, compounds also shown be suitable for stabilizing delicate halide perovskite structures. composite are now receiving lot interest their potential use various real‐world Despite exhibiting outstanding performance perovskites susceptible breakdown presence moisture, oxygen, heat, UV light. thought excellent improving both stability perovskite‐based devices. this work, that research applications fields discussed. The interfacial stability, structure–property correlations, application aspects analyzed at molecular level. This study explores developments, difficulties, future directions associated synthesis perovskite‐silicon compounds. image

Язык: Английский

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High‐Efficiency and Stable Perovskite Solar Cells via Buried Interface Modification with Multi‐Functional Phosphorylcholine Chloride

Advanced Functional Materials, Год журнала: 2024, Номер 34(40)

Опубликована: Июнь 21, 2024

Abstract The electron transport layer (ETL), perovskite layer, hole and electrode collectively constitute the solar cells (PSCs). Each of these layers plays a critical role in performance devices. However, there are mismatches crystal structure energy levels between ETL materials resulting numerous defects at their interface. In this study, multifunctional organic molecule called phosphorylcholine chloride is designed to modify interface SnO 2 layer. This modification serves both reduce oxygen vacancy passivate Consequently, conductivity mobility improved, higher‐quality film obtained. Ultimately, optimized PSC device achieves an impressive champion power conversion efficiency (PCE) 24.34% with minimal hysteresis index. Even after 1200 h ambient exposure 25 °C 25% relative humidity without encapsulation, maintains 91.44% its initial efficiency. Additionally, PCE 22.38% attained flexible PSCs. research will pave way for development low defects, high stability as well cells.

Язык: Английский

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Choline Derivative as a Multifunctional Interfacial Bridge through Synergistic Effects for Improving the Efficiency and Stability of Perovskite Solar Cells

Small, Год журнала: 2024, Номер 20(25)

Опубликована: Янв. 14, 2024

Abstract The interfacial carrier non‐radiative recombination caused by buried defects in electron transport layer (ETL) material and the energy barrier severely hinders further improvement efficiency stability of perovskite solar cells (PSCs). In this study, effect SnO 2 ETL doped with choline chloride (CC), acetylcholine (AC), phosphocholine sodium salt (PCSS) are investigated. These dopants modify interface between layer, acting as a bridge through synergistic effects to form uniform films, enhance contact, passivate defects. Ultimately, compared CC (which ─OH) AC C═O), PCSS P═O ions groups is more beneficial for improving performance. device based on PCSS‐doped achieves an 23.06% high V OC 1.2 V, which considerably higher than control (20.55%). Moreover, after aging 500 h at temperature 25 °C relative humidity (RH) 30–40%, unsealed ‐PCSS maintains 94% its initial efficiency, while only 80%. This study provides meaningful reference design selection ideal pre‐buried additive molecules.

Язык: Английский

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Self‐assembled monolayers for perovskite solar cells

Deleted Journal, Год журнала: 2024, Номер 1(1), С. 2 - 25

Опубликована: Март 14, 2024

Abstract In metal‐halide perovskite solar cells (PSCs), various carrier recombination losses occur at the interface between metal oxides (MOs) and (PVK) due to imperfect lattice structure of crystal surface. Additionally, nonoptimal energy levels MOs PVK, as well ion diffusion chemical corrosion two materials, severely hinder transport interface. Therefore, there is an urgent need introduce multifunctional materials PVK mitigate defects, limitations, corrosion, other related issues. recent years, self‐assembled monolayers (SAMs) have emerged essential organic interfacial for effectively bridging playing a pivotal role in enhancing cells’ performance. Based on this, we provide detailed overview origin development SAMs PSCs summarize importance potential from aspects, including their structure, passivation, level tuning, corrosion. We finally discuss prospects terms molecular deposition methods, application narrow‐band gap PSCs. With these insights, it anticipated that will assist realizing larger, highly efficient, stable, cost‐effective PSCs, thereby competitiveness photovoltaics market.

Язык: Английский

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