UV-robust and efficient perovskite solar cells enabled by interfacial photocatalysis suppression and defect passivation

Zhu, Jingwei; Hu, Xiaoye; Liu, Zhuoyan; Guo, Minghuang; Zhang, Ying; Li, Y. F.; Li, Junming; Wei, Mingdeng

doi:10.1039/d3ta02382f

Cited by 9 publications

(3 citation statements)

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“…This number is lower than that of the 8.84 × 10 15 cm –3 measured for the control film. The decreased trap density in the CHX-contained device shows that the addition of CHX improves the quality of perovskite films and successfully passivates perovskite defects. , Impedance measurements are carried out in the dark at open-circuit voltage. The target device’s arc is obviously much bigger than that of the control device, according to the Nyquist plots in Figure d.…”

Section: Resultsmentioning

confidence: 99%

Achieving Well-Oriented FAPbI₃ Perovskite Photovoltaics by Cyclohexane Modification

Dastan,

Mohammed,

Sh. Alnayli

et al. 2024

Langmuir

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It is essential and challenging to develop green and cost-effective solar cells to meet the energy demands. Solar cells with a perovskite light-harvesting layer are the most promising technology to propel the world toward next-generation solar energy. Formamidinium lead tri-iodide (FAPbI 3 )-based perovskite solar cells (F-PSCs), with their considerable performance, offer cost-effective solar cells. One of the major issues that the PSC community is now experiencing is the stability of α-FAPbI 3 at relatively low temperatures. In this study, we fabricated FAPbI 3 −PSCs using cyclohexane (CHX) material via a two-step deposition method. For this purpose, CHX is added to the formamidinium iodide:methylammonium chloride (FAI:MACl) solution as an additive and used to form a better FAPbI 3 layer by controlling the reaction between FAI and lead iodide (PbI 2 ). The CHX additive induces the reaction of undercoordinated Pb 2+ with FAI material and produces an α-FAPbI 3 layer with low charge traps and large domains. In addition, the CHX-containing FAPbI 3 layers show higher carrier lifetimes and facilitate carrier transfer in F-PSCs. The CHX-modified F-PSCs yield a high champion efficiency of 22.84% with improved ambient and thermal stability behavior. This breakthrough provides valuable findings regarding the formation of a desirable FAPbI 3 layer for photovoltaic applications and holds promise for the industrialization of F-PSCs.

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Section: Resultsmentioning

confidence: 99%

Achieving Well-Oriented FAPbI₃ Perovskite Photovoltaics by Cyclohexane Modification

Dastan,

Mohammed,

Sh. Alnayli

et al. 2024

Langmuir

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“…[49] It can be found that the value of α was increased from 0.993 (control) to 0.995 (FePP), indicating that FePP enhanced the carrier extraction and transport ability of HTL, thereby inhibiting recombination of interface carriers. Similarly, V OC and the logarithm of light intensity are plotted to obtain Figure 4b, and linear fitting was performed according to formula (5) [50] V…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Iron–Porphyrin Additive for Hole‐Transporting Layer Toward Efficient and Stable Perovskite Solar Cells

Guo,

Liu,

et al. 2024

Solar RRL

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Spiro‐OMeTAD, as a crucial component of the hole‐transporting layer, exhibits limited mobility and conductivity, and the Li‐TFSI dopant is sensitive to water vapor, which imposed restrictions on the photovoltaic efficiency and durability of perovskite solar cells (PSCs). In this work, the iron‐porphyrin (FePP) molecule is introduced into Spiro‐OMeTAD solution as additive, which facilitate the oxidation process of Spiro‐OMeTAD, leading to the enhancement of hole mobility and hole extraction and transport. Besides, the surface Pb2+ defects in the perovskite film are cured by the presence of carboxylic acids (‐COOH) in FePP. As a result, the photovoltaic properties of PSCs with FePP additive have been improved in all aspects, and a PCE of 21.58% can be achieved. Moreover, the FePP additive can further anchor the Li+ ions in HTL to prevent it from being invaded by water vapor. Dramatically, the degradation of unencapsulated devices is suppressed significantly, the device with FePP additive retain 82.0% of its original PCE under 10‐20% RH after 7100 h, and maintain about 79.6% of its original PCE under 50‐60% RH after 1000 h. Thus, this study shows that the design and development of multifunctional HTL additives holds great potential for achieving highly efficient and durable PSCs.This article is protected by copyright. All rights reserved.

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“…As is well known, polycrystalline perovskite films are typically prepared via solution processing methods, which inevitably introduce defects such as uncoordinated Pb 2+ and halide ion (I – ) vacancies at the grain boundaries and interfaces between the perovskite layer and the electron-transporting layer (ETL). , Numerous studies have engaged to improve the crystallinity and morphology of the perovskite films and passivate defects on the surface or at the interface via various strategies, including additive implementation, , antisolvent engineering, − and interface adjustment. ,− Particularly, interfacial engineering with functional semiconductors has been proved to be an effective approach for enhancing the PSCs’ photovoltaic properties along with facilitating the transportation of the charges, reducing defect density, and suppressing the recombination of the carriers, thereby promoting the crystal growth of the perovskite film and improving the photovoltaic performance of the solar cells. − Among them, nanomaterial nitrogen-doped graphene quantum dots (N-GQDs) can act as an effective interface modulation reagent for efficient PSCs, which is utilized to ameliorate the following perovskite film quality and facilitate charge-transfer kinetics as well. Bian et al embedded N-GQDs on the surface of γ-CsPbI 3 -based PSCs.…”

Section: Introductionmentioning

confidence: 99%

Tunable Photoluminescent Nitrogen-Doped Graphene Quantum Dots at the Interface for High-Efficiency Perovskite Solar Cells

Shen,

Lan,

Qiao

et al. 2024

ACS Appl. Nano Mater.

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The optimization of interfacial properties between the perovskite layer and the electron-transporting layer (ETL) is always a vital approach to reduce the defects for improving the photovoltaic performance of the perovskite solar cells (PSCs). Herein, nanomaterials of tunable photoluminescent nitrogen-doped graphene quantum dots (TP-N-GQDs) were prepared though a facile solid-phase microwave-assisted (SPMA) method in the presence of citric acid by adding urea as a nitrogen precursor. Leveraging the synergistic effect of N-GQDs along with the tunable photoluminescent property at the interface of PSCs proved to be an efficient strategy for enhancing the light-harvesting capability and facilitating the charge transportation simultaneously, which leads to an overall improvement of the PSC performance. Moreover, the electron-rich pyridinic nitrogen within TP-N-GQDs acted as a Lewis base, coordinating with Pb 2+ ions in perovskite and forming coordination bonds by sharing electron pairs, thereby decreasing the density of defects at the interface and the nonradiative recombination of the photogenerated carriers. Consequently, through the optimization of the nitrogen doping ratio of TP-N-GQDs, PSCs with areas of 0.09 and 1 cm 2 achieved maximum power conversion efficiencies (PCEs) of 21.98 and 17.12%, respectively. Additionally, TP-N-GQD passivation significantly enhanced the long-term stability of the device. The unencapsulated TP-N-GQDmodified device could sustain about 83% of its initial PCE afterward for 30 days of storage in air (25 ± 5 °C, RH 25 ± 5%).

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UV-robust and efficient perovskite solar cells enabled by interfacial photocatalysis suppression and defect passivation

Abstract: Interfacial photocatalysis of metal oxide electron transport layers (ETLs), especially TiO2, in organometal halide perovskite solar cells (PSCs) have detrimental effects on device stability. Herein, a UV absorber, 4,4'-Oxydibenzoic acid...

Cited by 9 publications

References 44 publications

Achieving Well-Oriented FAPbI₃ Perovskite Photovoltaics by Cyclohexane Modification

Achieving Well-Oriented FAPbI₃ Perovskite Photovoltaics by Cyclohexane Modification

Multifunctional Iron–Porphyrin Additive for Hole‐Transporting Layer Toward Efficient and Stable Perovskite Solar Cells

Tunable Photoluminescent Nitrogen-Doped Graphene Quantum Dots at the Interface for High-Efficiency Perovskite Solar Cells

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UV-robust and efficient perovskite solar cells enabled by interfacial photocatalysis suppression and defect passivation

Abstract: Interfacial photocatalysis of metal oxide electron transport layers (ETLs), especially TiO2, in organometal halide perovskite solar cells (PSCs) have detrimental effects on device stability. Herein, a UV absorber, 4,4'-Oxydibenzoic acid...

Cited by 9 publications

References 44 publications

Achieving Well-Oriented FAPbI3 Perovskite Photovoltaics by Cyclohexane Modification

Achieving Well-Oriented FAPbI3 Perovskite Photovoltaics by Cyclohexane Modification

Multifunctional Iron–Porphyrin Additive for Hole‐Transporting Layer Toward Efficient and Stable Perovskite Solar Cells

Tunable Photoluminescent Nitrogen-Doped Graphene Quantum Dots at the Interface for High-Efficiency Perovskite Solar Cells

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Achieving Well-Oriented FAPbI₃ Perovskite Photovoltaics by Cyclohexane Modification

Achieving Well-Oriented FAPbI₃ Perovskite Photovoltaics by Cyclohexane Modification