Oxidation-resistant all-perovskite tandem solar cells in substrate configuration

Wang, Yurui; Lin, Renxing; Wang, Xiaoyu; Liu, Chenshuaiyu; Ahmed, Yameen; Huang, Zilong; Zhang, Zhibin; Li, Hongjiang; Zhang, Mei; Gao, Yuan; Luo, Haowen; Wu, Pu; Gao, Han; Zheng, Xuntian; Li, Manya; Liu, Zhou; Kong, Weijie; Li, Ludong; Liu, Kaihui; Saidaminov, Makhsud I.; Zhang, Lijun; Hui‐min, Tan

doi:10.1038/s41467-023-37492-y

Cited by 46 publications

(23 citation statements)

References 69 publications

(82 reference statements)

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“…We speculated that the degradation of PCEs is mainly due to the oxidation of NBG perovskite. [ 35 ] We measured water contact angles of ETLs films deposited on WBG perovskite. As shown in Figure S33 (Supporting Information), HF film (water contact angle = 81.1°) exhibits better hydrophobicity than C 60 (water contact angle = 70.5°).…”

Section: Resultsmentioning

confidence: 99%

Scalable Solution‐Processed Hybrid Electron Transport Layers for Efficient All‐Perovskite Tandem Solar Modules

Sun,

Xiao,

Gao

et al. 2023

Advanced Materials

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All‐perovskite tandem solar cells offer the potential to surpass the Shockley–Queisser (SQ) limit efficiency of single‐junction solar cells while maintaining the advantages of low‐cost and high‐productivity solution processing. However, scalable solution processing of electron transport layer (ETL) in p‐i‐n structured perovskite solar subcells remains challenging due to the rough perovskite film surface and energy level mismatch between ETL and perovskites. Here, scalable solution processing of hybrid fullerenes (HF) with blade‐coating on both wide‐bandgap (≈1.80 eV) and narrow‐bandgap (≈1.25 eV) perovskite films in all‐perovskite tandem solar modules is developed. The HF, comprising a mixture of fullerene (C60), phenyl C61 butyric acid methyl ester, and indene‐C60 bisadduct, exhibits improved conductivity, superior energy level alignment with both wide‐ and narrow‐bandgap perovskites, and reduced interfacial nonradiative recombination when compared to the conventional thermal‐evaporated C60. With scalable solution‐processed HF as the ETLs, the all‐perovskite tandem solar modules achieve a champion power conversion efficiency of 23.3% (aperture area = 20.25 cm2). This study paves the way to all‐solution processing of low‐cost and high‐efficiency all‐perovskite tandem solar modules in the future.

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Section: Resultsmentioning

confidence: 99%

Scalable Solution‐Processed Hybrid Electron Transport Layers for Efficient All‐Perovskite Tandem Solar Modules

Sun,

Xiao,

Gao

et al. 2023

Advanced Materials

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“…This would ask for more efforts from the community, especially from the chemistry aspect. On the other hand, an extra gain on the output current could be realized by properly introducing antireflection materials out of the cell , or even out of the encapsulation glass . Additionally, moving from two-terminal to four-terminal tandems , would face no current mismatch issues but would imply needing to manufacture two separate tandem modules and then to laminate them together.…”

Section: All-perovskite Tandemsmentioning

confidence: 99%

“…Inset: Cross-sectional SEM image of the edge of a substrate-configured tandem. Reproduced with permission from ref . Copyright 2023 Springer Nature under a Creative Commons Attribution 4.0 International License.…”

Section: All-perovskite Tandemsmentioning

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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“…Wang et al made a semitransparent FA 0.8 Cs 0.2 Pb(I 0.6 Br 0.4 ) 3 (E g ∼ 1.77 eV) perovskite film for an all-perovskite tandem cell and observed a poor fill factor and V OC , which they attributed to deep-level traps caused by regions of high Br − concentration that increased nonradiative recombination. 585 To avoid the lattice distortion caused by larger cations like PEA + , they incorporated guanidine tetrafluoroborate (GuaBF 4 ), which proved more effective in suppressing halide vacancy defect formation and ion migration. BF 4 − anions have been used by several groups in the past to fill I − vacancies, exploiting their similar ionic radii (I − = 220 pm, BF 4 − = 218 pm).…”

Section: Aci-type Spacer Cationsmentioning

confidence: 99%

Synergy of 3D and 2D Perovskites for Durable, Efficient Solar Cells and Beyond

Metcalf,

Sidhik,

Zhang

et al. 2023

Chem. Rev.

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Three-dimensional (3D) organic–inorganic lead halide perovskites have emerged in the past few years as a promising material for low-cost, high-efficiency optoelectronic devices. Spurred by this recent interest, several subclasses of halide perovskites such as two-dimensional (2D) halide perovskites have begun to play a significant role in advancing the fundamental understanding of the structural, chemical, and physical properties of halide perovskites, which are technologically relevant. While the chemistry of these 2D materials is similar to that of the 3D halide perovskites, their layered structure with a hybrid organic–inorganic interface induces new emergent properties that can significantly or sometimes subtly be important. Synergistic properties can be realized in systems that combine different materials exhibiting different dimensionalities by exploiting their intrinsic compatibility. In many cases, the weaknesses of each material can be alleviated in heteroarchitectures. For example, 3D-2D halide perovskites can demonstrate novel behavior that neither material would be capable of separately. This review describes how the structural differences between 3D halide perovskites and 2D halide perovskites give rise to their disparate materials properties, discusses strategies for realizing mixed-dimensional systems of various architectures through solution-processing techniques, and presents a comprehensive outlook for the use of 3D-2D systems in solar cells. Finally, we investigate applications of 3D-2D systems beyond photovoltaics and offer our perspective on mixed-dimensional perovskite systems as semiconductor materials with unrivaled tunability, efficiency, and technologically relevant durability.

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Oxidation-resistant all-perovskite tandem solar cells in substrate configuration

Cited by 46 publications

References 69 publications

Scalable Solution‐Processed Hybrid Electron Transport Layers for Efficient All‐Perovskite Tandem Solar Modules

Scalable Solution‐Processed Hybrid Electron Transport Layers for Efficient All‐Perovskite Tandem Solar Modules

Narrow Bandgap Metal Halide Perovskites for All-Perovskite Tandem Photovoltaics

Synergy of 3D and 2D Perovskites for Durable, Efficient Solar Cells and Beyond

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