Probing charge carrier dynamics in metal halide perovskite solar cells

Qiu, Cheng; Wagner, Lukas; Liu, Jiale; Zhang, Wenhao; Du, Jiankang; Wang, Qifei; Hu, Yue; Han, Hongwei

doi:10.1002/eom2.12268

Cited by 18 publications

(13 citation statements)

References 223 publications

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“…Considering that the PL peak intensity varies reversely when all the films are grown on insulating substrates (Figure S4, Supporting Information), the intensity decrease upon additive inclusion in Figure 1i reveals that the use of additives induces more efficient injection of photo‐induced electrons into the SnO 2 electron transporting layers from the films. [ 32 ] This inference is further supported by the time‐resolved photoluminescence (TRPL) results in Figure S5 (Supporting Information), in which PL quenching is more noticeable in the additive modified films, particularly for the film with the additive package KPF 6 + MACl. [ 33 ]…”

Section: Resultsmentioning

confidence: 72%

MXene‐Interconnected Two‐Terminal, Mechanically‐Stacked Perovskite/Silicon Tandem Solar Cell with High Efficiency

Han,

Zhu,

Wang

et al. 2023

Adv Funct Materials

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Two‐terminal, mechanically‐stacked perovskite/silicon tandem solar cells offer a feasible way to achieve power conversion efficiencies (PCEs) of over 35%, provided that the state‐of‐the‐art industrial silicon solar cells and perovskite solar cells (PSCs) are fully compatible with one another. Herein, two‐terminal, mechanically‐stacked perovskite/silicon tandem solar cells are developed by mechanically interconnecting semitransparent PSCs and TOPCon solar cells with a MXene interlayer. The semitransparent PSCs are made from wide‐bandgap perovskite Cs0.15FA0.65MA0.20Pb(I0.80Br0.20)3 films. Furthermore, the co‐additives KPF6 and CH3NH3Cl(MACl) are employed to reduce grain boundaries and intragranular defects in the perovskite, boosting the PCE of the semitransparent PSCs to a record‐high value of 20.96% under reverse scan (RS) through a reduction in non‐radiative recombination probability. These optimized semitransparent PSCs are then employed in MXene‐interconnected two‐terminal, mechanically‐stacked tandem solar cells. The enhanced interfacial carrier transportation, with minimal influence on light transmission, imparted by the MXene flakes allows the tandem solar cells to achieve a stabilized PCE of 29.65%. The tandem cells also exhibit acceptable operational stability and are able to retain ≈93% and 92% of their initial PCEs after 120 min of continuous illumination or storage in ambient air for 1000 h, respectively.

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Section: Resultsmentioning

confidence: 72%

MXene‐Interconnected Two‐Terminal, Mechanically‐Stacked Perovskite/Silicon Tandem Solar Cell with High Efficiency

Han,

Zhu,

Wang

et al. 2023

Adv Funct Materials

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“…Figure S2 shows that the luminous intensity of the MAPbI 3 films containing BZMIMCl was significantly higher than that of the pristine MAPbI 3 films. On the one hand, this finding can be attributed to the enhanced perovskite crystallization after the introduction of BZMIMCl. − On the other hand, the perovskite layer formed at the interface between carbon and perovskites may serve as an electron-blocking layer, preventing surface recombination at this interface. Such a thin electron-blocking layer is quite effective at boosting the FF and V OC of the PSCs. , Furthermore, a blue shift of the emission peak from 761.71 to 757.71 nm was observed (Figure S2), which may be due to the additional radiative recombination in the MAPbI 3 layer with BZMIMCl.…”

Section: Resultsmentioning

confidence: 99%

Two Birds with One Stone: Defect Passivation and Energy Level Optimization Achieved by Using Ionic Liquid Additives for Printable Mesoscopic Perovskite Solar Cells with Efficiency beyond 16%

Wang

Chen

et al. 2023

ACS Appl. Energy Mater.

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Printable mesoscopic perovskite solar cells (p-MPSCs) have received extensive attention from researchers and entrepreneurs worldwide because of their low cost, simple manufacturing process, and feasible fabricate in air. However, the wide application of p-MPSCs is limited by their relatively low power conversion efficiency (PCE). Herein, we propose a performance enhancement strategy for p-MPSCs by introducing 1-benzyl-3-methylimidazolium chloride (BZMIMCl) ionic liquid into a perovskite precursor. The BZMIMCl ionic liquid optimized the crystallization of perovskite films, modulated the energy band alignment of the perovskite, and improved carrier transport, thereby enhancing the overall photovoltaic parameters and stability of p-MPSCs. The champion PCE of the BZMIMCl-optimized device was 16.06%. Moreover, the unencapsulated p-MPSCs containing BZMIMCl maintained ∼89.6% of its maximum value after being stored for 60 days in an atmospheric environment (25 ± 5 °C @ 50 ± 5% RH, in the dark). This work further promotes the application of ionic liquids in the development of efficient p-MPSCs.

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“…[1,[51][52][53][54] In the past ten years, the research and application of this method have never stopped. [55][56][57][58][59] Recently, TAS analysis has been further optimized and developed and successfully applied to the correlation analysis of tandem solar cells. [60][61][62] Key mechanism behind this measurement can be illustrated by two formulas.…”

Section: Continuous Trackingmentioning

confidence: 99%

Characterizing Spatial and Energetic Distributions of Trap States Toward Highly Efficient Perovskite Photovoltaics

Chen,

Lou,

Wang

2023

Small

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Due to their greater opt electric performance, perovskite photovoltaics (PVs) present huge potential to be commercialized. Perovskite PV’s high theoretical efficiency expands the available development area. The passivation of defects in perovskite films is crucial for approaching the theoretical limit. In addition to creating efficient passivation techniques, it is essential to direct the passivation approach by getting precise and real‐time information on the trap states through measurements. Therefore, it is necessary to establish quantitative characterization methods for the trap states in energy and 3D spaces. The authors cover the characterization of the spatial and energy distributions of trap states in this article with an eye toward high‐efficiency perovskite photovoltaics. After going over the strategies that have been created for characterizing and evaluating trap states, the authors will concentrate on how to direct the creative development of characterization techniques for trap states assessment and highlight the opportunities and challenges of future development. The 3D space and energy distribution mappings of trap states are anticipated to be realized. The review will give key guiding importance for further approaching the theoretical efficiency of perovskite photovoltaics, offering some future research direction and technological assistance for the development of appropriate targeted passivation technologies.

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Probing charge carrier dynamics in metal halide perovskite solar cells

Cited by 18 publications

References 223 publications

MXene‐Interconnected Two‐Terminal, Mechanically‐Stacked Perovskite/Silicon Tandem Solar Cell with High Efficiency

MXene‐Interconnected Two‐Terminal, Mechanically‐Stacked Perovskite/Silicon Tandem Solar Cell with High Efficiency

Two Birds with One Stone: Defect Passivation and Energy Level Optimization Achieved by Using Ionic Liquid Additives for Printable Mesoscopic Perovskite Solar Cells with Efficiency beyond 16%

Characterizing Spatial and Energetic Distributions of Trap States Toward Highly Efficient Perovskite Photovoltaics

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