Back Interface Passivation for Efficient Low-Bandgap Perovskite Solar Cells and Photodetectors

Lu, Jiayu; Wang, Huayang; Fan, Tingbing; Ma, Ding; Wang, Changlei; Wu, Shaolong; Li, Xiao Feng

doi:10.3390/nano12122065

Cited by 4 publications

(3 citation statements)

References 51 publications

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“…The specific data was illustrated in Table S2. The device with AlN treatment had a larger R rec than the control device, which may be attributed to the reduced defects and improved charge transfer. , …”

Section: Resultsmentioning

confidence: 93%

“…The device with AlN treatment had a larger R rec than the control device, which may be attributed to the reduced defects and improved charge transfer. 29,30 Furthermore, the trap density (tDOS) was also investigated (Figure 4d). The device treated with AlN exhibited a lower trap density compared to the control device, which further confirms the effective passivation of defects.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Thermal Shock-Resistant Aluminum Nitride Improves Thermal Stability of Mixed Sn–Pb Perovskite Solar Cells

Tan,

Li,

Zhu

et al. 2024

ACS Sustainable Chem. Eng.

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Perovskite solar cells (PSCs) are highly susceptible to ambient temperature and heat during operation, which can result in poor thermal stability of the device. Therefore, enhancing heat dissipation and reducing internal heat accumulation have emerged as critical research areas to enhance the thermal stability of devices. However, the current research mainly targets improving the heat dissipation of Pb-based PSCs, and there is a lack of comprehensive research on heat dissipation in mixed Sn–Pb PSCs. In this paper, aluminum nitride (AlN), known for high thermal shock resistance, is introduced as a heat dissipation layer, which reduces the heat accumulation between the perovskite layer and the electron transport layer to improve the efficiency and thermal stability of mixed Sn–Pb PSCs. AlN is introduced to increase the thermal conductivity of the perovskite layer and the entire device to improve the heat dissipation inside the device. The introduction of the AlN treatment layer not only mitigates the damage caused by heat accumulation but also enhances the overall stability of the device. The AlN-treated Sn–Pb PSCs display enhanced thermal stability, maintaining 89% of their initial efficiency even after being aged at 85 °C for 600 h. Furthermore, the incorporation of AlN also contributes to the improved power conversion efficiency, with a companion power conversion efficiency of 23.28% and a remarkable open-circuit voltage of 0.882 V.

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Section: Resultsmentioning

confidence: 93%

Section: ■ Results and Discussionmentioning

confidence: 99%

Thermal Shock-Resistant Aluminum Nitride Improves Thermal Stability of Mixed Sn–Pb Perovskite Solar Cells

Tan,

Li,

Zhu

et al. 2024

ACS Sustainable Chem. Eng.

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“…12 Developing chelating molecules that efficiently passivate and stabilize the fresh films, without inducing unfavorable carrier recombination, offers an effective way to improve the performance of mixed Sn−Pb perovskite electronics. 290 On the other hand, electrical shunts might be another serious issue for an efficient device considering that mixed Sn−Pb films present a high degree of roughness, especially when a thin ETL is deposited in the following via spin coating (Figure 7a-iii, iv). In order to reduce the layer roughness and improve the conformality of subsequently coated ETLs, an extra layer might be required.…”

Section: Exposed Surfacementioning

confidence: 99%

Narrow Bandgap Metal Halide Perovskites for All-Perovskite Tandem Photovoltaics

Hu,

Thiesbrummel,

Pascual

et al. 2024

Chem. Rev.

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All-perovskite tandem solar cells are attracting considerable interest in photovoltaics research, owing to their potential to surpass the theoretical efficiency limit of single-junction cells, in a cost-effective sustainable manner. Thanks to the bandgap-bowing effect, mixed tin−lead (Sn−Pb) perovskites possess a close to ideal narrow bandgap for constructing tandem cells, matched with wide-bandgap neat lead-based counterparts. The performance of all-perovskite tandems, however, has yet to reach its efficiency potential. One of the main obstacles that need to be overcome is theoftentimeslow quality of the mixed Sn−Pb perovskite films, largely caused by the facile oxidation of Sn(II) to Sn(IV), as well as the difficult-to-control film crystallization dynamics. Additional detrimental imperfections are introduced in the perovskite thin film, particularly at its vulnerable surfaces, including the top and bottom interfaces as well as the grain boundaries. Due to these issues, the resultant device performance is distinctly far lower than their theoretically achievable maximum efficiency. Robust modifications and improvements to the surfaces of mixed Sn−Pb perovskite films are therefore critical for the advancement of the field. This Review describes the origins of imperfections in thin films and covers efforts made so far toward reaching a better understanding of mixed Sn−Pb perovskites, in particular with respect to surface modifications that improved the efficiency and stability of the narrow bandgap solar cells. In addition, we also outline the important issues of integrating the narrow bandgap subcells for achieving reliable and efficient all-perovskite double-and multi-junction tandems. Future work should focus on the characterization and visualization of the specific surface defects, as well as tracking their evolution under different external stimuli, guiding in turn the processing for efficient and stable single-junction and tandem solar cell devices.

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The UV–vis‐NIR Broadband Ultrafast Flexible Sn‐Pb Perovskite Photodetector for Multispectral Imaging to Distinguish Substance and Foreign‐Body in Biological Tissues

Li,

Chen,

Lin

et al. 2023

Advanced Optical Materials

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Multispectral imaging plays an important role in many applications such as color recognition, substance distinction, and medical therapy. Although multicolor detection has been demonstrated in lead‐based perovskites, the limited near‐infrared responsivity and slow response impede their applications for identifying the substance. Herein, narrow bandgap highly stable Cs0.05MA0.45FA0.5Sn0.5Pb0.5I3 (Sn‐Pb) perovskite films with excellent crystallinity and selective growth orientation are realized by the synergy of a Sn‐Pb mixing method and electronegativity balance. The Sn‐Pb perovskite photodetector shows a broadband response from 350 to 1000 nm and high‐performance near‐infrared (NIR) detection with a fast response of 2.0 µs and excellent responsivity of 0.29 A W−1. Furthermore, flexible Sn‐Pb perovskite devices without any encapsulation in the air continuously exhibit fast response after 3000 bending cycles. In addition, the Sn‐Pb perovskite diffuse reflection imaging system is demonstrated for multispectral imaging and substance distinction. Meanwhile, foreign‐body identification in biological tissues by NIR imaging of Sn‐Pb perovskite photodetectors is further demonstrated, proving narrow bandgap mixed perovskite photodetectors an attractive candidate for biomedical imaging.

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Back Interface Passivation for Efficient Low-Bandgap Perovskite Solar Cells and Photodetectors

Cited by 4 publications

References 51 publications

Thermal Shock-Resistant Aluminum Nitride Improves Thermal Stability of Mixed Sn–Pb Perovskite Solar Cells

Thermal Shock-Resistant Aluminum Nitride Improves Thermal Stability of Mixed Sn–Pb Perovskite Solar Cells

Narrow Bandgap Metal Halide Perovskites for All-Perovskite Tandem Photovoltaics

The UV–vis‐NIR Broadband Ultrafast Flexible Sn‐Pb Perovskite Photodetector for Multispectral Imaging to Distinguish Substance and Foreign‐Body in Biological Tissues

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