Directly purifiable Pre-oxidation of Spiro-OMeTAD for stability enhanced perovskite solar cells with efficiency over 23%

Wu, Jinpeng; Ma, Zhiye; Huang, Shiyu; Yan, Lei; Guo, Haodan; Fang, Yanyan; Xie, Dexin; Fu, Nianqing; Lin, Yuan

doi:10.1016/j.cej.2022.135457

Cited by 16 publications

(13 citation statements)

References 55 publications

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“…Recently, Wu et al employed CoF 3 as a p-type dopant to effectively pre-oxidize spiro-OMeTAD. 87 Due to the discrepancy in the solubility between the dopant and the host, the doping reaction occurs at the solid/liquid interface, and excess reactant CoF 3 and products CoF 2 and LiF can be filtered out (Fig. 9b).…”

Section: Co-doping Of Li–tfsi/t-bpmentioning

confidence: 99%

Perovskite solar cells: Li–TFSI and t-BP-based chemical dopant engineering in spiro-OMeTAD

et al. 2023

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Section: Co-doping Of Li–tfsi/t-bpmentioning

confidence: 99%

Perovskite solar cells: Li–TFSI and t-BP-based chemical dopant engineering in spiro-OMeTAD

et al. 2023

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“…Wu et al developed a new method to oxidize Spiro-OMeTAD by introducing cobalt trifluoride (CoF 3 ) into the precursor solution. [78] CoF 3 powder can oxidize the Spiro-OMeTAD molecule (Figure 5d). The oxidation reaction occurred at the interface of solid and liquid which can be described by the equation: Spiro-OMeTAD:LiTFSI+CoF 3 →Spiro-OMeTAD + : TFSI − +CoF 2 (s)+LiF(s).…”

Section: Reduced LI + Ion Content In Htlmentioning

confidence: 99%

Section: Metal Cation Tfsi Saltsmentioning

confidence: 99%

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Spiro‐OMeTAD‐Based Hole Transport Layer Engineering toward Stable Perovskite Solar Cells

Shen

Deng

2022

Small Methods

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Perovskite solar cells (PSCs) have undergone unprecedented growth in the past decade as an emerging photovoltaic technology. Up till now, the power conversion efficiency of PSCs has exceeded 25% that rivals silicon solar cells and there is still room for further enhancement. However, the development in long‐term stability lags far behind, which remains a great concern for the commercial application in the future. The device instability mainly arises from the functional components, including perovskite film, charge transport layers, and electrodes along with the involved interfaces. As the most widely studied hole transport layer at the current stage, 2,2′,7,7′‐tetrakis(N,N‐di(4‐methoxyphenyl)amino)‐9,9‐spirobifluorene (Spiro‐OMeTAD) helps contribute to the achievement of record efficiency but it weakens the device stability due to the doping‐induced side effects such as hygroscopicity and ion migration. Great efforts are devoted to boosting the stability of Spiro‐OMeTAD while maintaining excellent photovoltaic performance. In this review, the fundamental properties of Spiro‐OMeTAD have been summarized and the recent advances in engineering Spiro‐OMeTAD‐based hole transport layer for the sake of highly efficient PSCs with enhanced longevity are highlighted. In the end, an outlook for the further optimization of Spiro‐OMeTAD is provided and the issues related to large‐scale production are discussed.

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“…Notably, the Spiro-OMeTAD precursor solution is usually added with additional additives such as Li-bis(trifluoromethanesulfonyl) imide and 4- tert -butylpyridine to improve the electrical properties of the material . However, these additional additives have an adverse effect on the stability of Spiro-OMeTAD due to hygroscopicity and correspondingly induce the underlying perovskite degradation. , Therefore, the development of novel chemically stable HTMs is imminent for the development of PSCs. Although some dopant-free organic materials such as Spiro-type (M6-F) and 2,3-diphenylthieno[3,4- b ]pyrazine have been designed as HTMs for PSCs and exhibit good hole transport properties, the long-term stability of PSCs based on these organic materials is still open to debate. , …”

Section: Introductionmentioning

confidence: 99%

Ecofriendly Mn₃O₄ as a Novel Hole Transport Material for Efficient and Ultrastable Flexible and Rigid Perovskite Solar Cells

Yi,

Li,

Xiao

et al. 2023

ACS Sustainable Chem. Eng.

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Exploring ecofriendly, low-cost, and chemically stable hole transport materials (HTMs) is of great significance for the commercial application of perovskite solar cells (PSCs). In view of this, we first employed the inorganic p-type semiconductor trimanganese tetraoxide (Mn 3 O 4 ) as a HTM prepared by vacuum vapor deposition for flexible and rigid PSCs. It was revealed that the Mn 3 O 4 material presented a suitable band structure, outstanding electrical conductivity, and hole mobility, which was a potential HTM for PSCs. The optimized flexible and rigid PSCs based on the Mn 3 O 4 thickness (50 nm) achieved the best photoelectric conversion efficiencies (PCEs) of 15.58 and 18.07%, respectively. More importantly, the unencapsulated rigid device based on Mn 3 O 4 exhibited outstanding stability and retained 91.7% of the original PCE after storage for 1000 h at double 85 condition (85 °C and 85 ± 5% relative humidity). Additionally, the target flexible PSCs still maintained 92.3% of the initial efficiency after 1000 bending cycles with a radius of 5 mm. Obviously, the Mn 3 O 4 semiconductor is a promising candidate as a HTM compatible with flexible and rigid PSCs, which plays a pivotal role in improving the stability of the devices. It is believed that our research results provide new insights for realizing cost-effective and ultrastable photovoltaic devices.

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Directly purifiable Pre-oxidation of Spiro-OMeTAD for stability enhanced perovskite solar cells with efficiency over 23%

Cited by 16 publications

References 55 publications

Perovskite solar cells: Li–TFSI and t-BP-based chemical dopant engineering in spiro-OMeTAD

Perovskite solar cells: Li–TFSI and t-BP-based chemical dopant engineering in spiro-OMeTAD

Spiro‐OMeTAD‐Based Hole Transport Layer Engineering toward Stable Perovskite Solar Cells

Ecofriendly Mn₃O₄ as a Novel Hole Transport Material for Efficient and Ultrastable Flexible and Rigid Perovskite Solar Cells

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Directly purifiable Pre-oxidation of Spiro-OMeTAD for stability enhanced perovskite solar cells with efficiency over 23%

Cited by 16 publications

References 55 publications

Perovskite solar cells: Li–TFSI and t-BP-based chemical dopant engineering in spiro-OMeTAD

Perovskite solar cells: Li–TFSI and t-BP-based chemical dopant engineering in spiro-OMeTAD

Spiro‐OMeTAD‐Based Hole Transport Layer Engineering toward Stable Perovskite Solar Cells

Ecofriendly Mn3O4 as a Novel Hole Transport Material for Efficient and Ultrastable Flexible and Rigid Perovskite Solar Cells

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Ecofriendly Mn₃O₄ as a Novel Hole Transport Material for Efficient and Ultrastable Flexible and Rigid Perovskite Solar Cells