Thermal stability enhancement of perovskite MAPbI3 film at high temperature (150 °C) by PMMA encapsulation

Soo, Yew Hang; Ng, Soo Ai; Wong, Yew Hoong; Ng, Chai Yan

doi:10.1007/s10854-021-06041-y

Cited by 14 publications

(6 citation statements)

References 86 publications

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“…57 It was experimentally confirmed that surface reflectance decreased after the PMMA coating above the perovskite layer (Figure S8). It has also been reported that PMMA can be used for passivation 58 and encapsulation 59 in perovskite solar cells. As the top contact-free structure is vulnerable to degradation since the perovskite layer is directly exposed to air, a PMMA layer with high transmittance is a suitable material to be coated on top of the perovskite layer with further optimization of thickness control.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

Pyun

Lee

Kim

et al. 2023

ACS Appl. Energy Mater.

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Current density plays a substantial role in monolithic tandem solar cells; however, it is difficult to control because subcells and auxiliary layers are stacked and serially connected vertically to obtain higher voltages. The vertically stacked structure intrinsically triggers inevitable parasitic absorption. In current typical perovskite/silicon two-terminal (2-T) tandem solar cells, 5−10 layers are placed on the light path, even though they are not current generating layers. These layers usually include transparent window layers, buffer layers, carrier extraction layers, and recombination layers. Therefore, the development of top contact-free architectures to reduce parasitic absorption in 2-T tandem solar cells is required for achieving high efficiency. In this study, a top contact-free perovskite/silicon 2-T tandem solar cell with quasi-interdigitated intermediate electrodes (Q-IDIEs) is reported for the first time. Several layers placed above the perovskite layer in conventional devices are relocated to the backside of the perovskite. The Q-IDIE, composed of a patterned Ni/NiO X shell above the full-deposited TiO 2 , was fabricated by the following processes: photolithography, lift-off, and oxidation. The device results in 4.23% efficiency with an open-circuit voltage of 1.54 V. This tandem architecture is expected to be a breakthrough for overcoming the theoretical efficiency limit of single-junction solar cells with further optimization.

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Section: ■ Results and Discussionmentioning

confidence: 99%

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

Pyun

Lee

Kim

et al. 2023

ACS Appl. Energy Mater.

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“…[19] Generally, the intensity of MAPbI 3 (110) peak can be compared with the PbI 2 (100) peak in order to determine the completeness of the MAPbI 3 formation from its precursor phase. [18,20] After PMMA doping, the intensity of the MAPbI 3 peak at 14.4° is slightly increased compared to the pure MAPbI 3 film, while the unreacted PbI 2 (100) peak is becoming gradually inconspicuous. Further, with P-T co-doping, the PbI 2 (100) peak almost vanishes, indicative of a complete perovskite phase and better crystallization, suggesting reduced defects and suppressed non-radiative recombination.…”

Section: Resultsmentioning

confidence: 99%

High‐Efficiency Air‐Processed Si‐Based Perovskite Light‐Emitting Devices via PMMA‐TBAPF₆ Co‐Doping

Zhu

Xiao

et al. 2022

Advanced Optical Materials

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used Si only as a substrate and obtained an EQE of 13.7%, both EQE of them are much lower than that with ITO-based PeLEDs. Meanwhile, it must be mentioned that, most of the silicon process manufacturing line is carried out in the atmosphere, so it is still hoped that high-efficiency PeLEDs can be prepared in the air environment. To enhance the Si-based PeLEDs, energy level control, band matching, as well as interface passivation between perovskite and silicon are still problems that need to be solved.In previous works, [6,7] we first fabricated Si-based PeLEDs and enhanced the EQE from less than 0.1% to 0.91% via energy level control. Then, we passivated the interface defects in the device [8] and adjusted the device structure to increase device efficiency. [9] Further, the surface of the perovskite was modified by PMMA anti-solvent doping, so that the device can operate normally in a high humidity atmosphere, and an EQE of 7.5% is obtained. [9] However, although the PMMA protects perovskite from degradation in the air and passivates the perovskite surface, the passivation is not comparable to other materials. [10][11][12] Also, with PMMA doping, the roughness of MAPbI 3 surface increases (Figure S1, Supporting Information). The rough interface will reduce the contact between perovskite and electron transport layer (ETL) ZnO, leading to decreased electron injection. [13] In addition, PMMA is an insulator, which will also hinder carrier injection and cause the imbalance charge injection. Therefore, we need to dope other materials to make up for the deficiency of PMMA.To improve the performance of perovskite and the efficiency of PeLEDs, organoammonium cations doping is always a good choice, and TBAPF 6 has the tetrabutylammonium cations and phosphate anions, both of them can passivate the surface defects of perovskite [14][15][16][17] and significantly enhance the efficiency of perovskite devices. Co-doping TBAPF 6 with PMMA can not only passivate defect states on the perovskite surface, but also increase conductivity of PMMA-modified perovskite, leading to the enhancement of the devices' electroluminescence (EL) performance. So, in this work, we propose a Si-based air-processed near-infrared PeLED with high efficiency by PMMA-TBAPF 6 co-doping. The PMMA protect perovskite from degradation in air-ambient while the TBAPF 6 passivate surface defect states and increase the conductivity. The PeLED with co-doping shows a strong EL intensity, which is 7 times than that of the reference device. The EQE of the PeLED fabricated with the co-doped perovskite is enhanced to 10.4%, which is the highest among allThe preparation of high-efficiency perovskite light-emitting devices (PeLEDs) in the air-ambient has always been a challenge. Herein, the authors propose a Si-based near-infrared air-processed PeLED through the anti-solvent engineering. Two materials, poly(methyl methacrylate) (PMMA) and tetrabutylammonium hexafluorophosphate (TBAPF 6 ) are co-doped into the anti-solvent, the former protects the perovskite from degradat...

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“…However, a possible concern in polymer encapsulation is the solvent used for polymer coating, since it has been reported that poly(methyl methacrylate) (PMMA) deposition from chlorobenzene solutions can result in damage to the 2,2’,7,7’-tetrakis[ N , N -di(4-methoxyphenyl)amino]-9,9’-spirobifluorene (spiroOMeTAD) layer . Various polymers have been reported for the encapsulation of perovskite films and devices, such as PDMS, plasma polymer film from adamantane precursor, poly(methylmethacrylate) (PMMA), ,− parylene C, TPU, PMMA/vulcanized silicone rubber, PMMA//styrene-butadiene (SB), fluoropolymer coating, etc. In addition to polymer films, roll-transferred graphene has also been used as well as spray-coated reduced graphene oxide (rGO) .…”

Section: Encapsulation Methods and Materials For Pscsmentioning

confidence: 99%

Encapsulation and Stability Testing of Perovskite Solar Cells for Real Life Applications

et al. 2022

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With the progress in the development of perovskite solar cells, increased efforts have been devoted to enhancing their stability. With more devices being able to survive harsher stability testing conditions, such as damp heat or outdoor testing, there is increased interest in encapsulation techniques suitable for this type of tests, since both device architecture compatible with increased stability and effective encapsulation are necessary for those testing conditions. A variety of encapsulation techniques and materials have been reported to date for devices with different architectures and tested under different conditions. In this Perspective, we will discuss important factors affecting the encapsulation effectiveness and focus on the devices, which have been subjected to outdoor testing or damp heat testing. In addition to encapsulation requirements for these testing conditions, we will also discuss device requirements. Finally, we discuss possible methods for accelerating the testing of encapsulation and device stability and discuss the future outlook and important issues, which need to be addressed for further advancement of the stability of perovskite solar cells.

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Thermal stability enhancement of perovskite MAPbI3 film at high temperature (150 °C) by PMMA encapsulation

Cited by 14 publications

References 86 publications

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

High‐Efficiency Air‐Processed Si‐Based Perovskite Light‐Emitting Devices via PMMA‐TBAPF₆ Co‐Doping

Encapsulation and Stability Testing of Perovskite Solar Cells for Real Life Applications

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Thermal stability enhancement of perovskite MAPbI3 film at high temperature (150 °C) by PMMA encapsulation

Cited by 14 publications

References 86 publications

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

First Demonstration of Top Contact-Free Perovskite/Silicon Two-Terminal Tandem Solar Cells for Overcoming the Current Density Hurdle

High‐Efficiency Air‐Processed Si‐Based Perovskite Light‐Emitting Devices via PMMA‐TBAPF6 Co‐Doping

Encapsulation and Stability Testing of Perovskite Solar Cells for Real Life Applications

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High‐Efficiency Air‐Processed Si‐Based Perovskite Light‐Emitting Devices via PMMA‐TBAPF₆ Co‐Doping