Energy level modulation of TiO2 using amino trimethylene phosphonic acid for efficient perovskite solar cells with an average VOC of 1.19 V

Li, Meicheng; Yue, Xiaopeng; Fan, Bingbing; Zhao, Xing; Yang, Yingying; Qu, Shujie; Zhang, Qiang; Sun, Xin; Cui, Peng; Ma, Junfeng

doi:10.1039/d2se01522f

Cited by 2 publications

(1 citation statement)

References 41 publications

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“…The reduced non-radiative carrier recombination may result from enhanced interfacial electron extraction and passivated interface defects (Figures S16-S18 and Notes S2 and S3, Supporting Information). [45][46][47] To explore the influence of the AH-SnO 2 capping layer on the PSCs photovoltaic performance, we fabricated PSCs with TiO 2 /SnO 2 and TiO 2 /AH-SnO 2 as ETL, where the perovskite film was deposited using the one-step method. Figure 3d dis-plays the reverse J-V curves of the champion PSCs where the active area is 0.08 cm 2 .…”

Section: The Enhanced Electron Extraction and Photovoltaic Performanc...mentioning

confidence: 99%

Homogenizing the Electron Extraction via Eliminating Low‐Conductive Contacts Enables Efficient Perovskite Solar Cells with Reduced Up‐Scaling Losses

Lan,

Huang,

et al. 2024

Adv Funct Materials

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Maintaining the power conversion efficiency (PCE) of perovskite solar cells (PSCs) while enlarging the active area is necessary for their industrialization, where the key part is the uniform carrier extraction. Here, a conformal electron transport layer (ETL) is reported with eliminated low‐conductive contacts through a tailored deposition that combines chemical bath deposition and modified spin‐coating on a light‐managing textured substrate. The KPFM and C‐AFM are utilized to prove the uniform and optimized electrical properties. This study further employs the 2D measurements of PL and TRPL mapping to focus on revealing the enhanced uniformity of electron extraction. The uniform ETL conductivity and electron extraction contribute to a substantial decrease in device up‐scaling losses, making the δPCE ( between 0.08 cm2‐device and 1 cm2‐device decrease from 5.02% to 2.97%, while the perovskite film is deposited using two‐step method. When using one‐step method to deposit perovskite film, PCEs of 25.13% and 23.93% for the active area of 0.08 cm2 and 1 cm2 are achieved, and the δPCE decreases from 7.89% to 4.77%, validating the significant effects on reducing up‐scaling losses. This work provides a new perspective to maintain high efficiency while device up‐scaling, providing more opportunities to push forward the PSCs industrialization.

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Section: The Enhanced Electron Extraction and Photovoltaic Performanc...mentioning

confidence: 99%

Homogenizing the Electron Extraction via Eliminating Low‐Conductive Contacts Enables Efficient Perovskite Solar Cells with Reduced Up‐Scaling Losses

Lan,

Huang,

et al. 2024

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

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Regulating TiO2 Deposition Using a Single-Anchored Ligand for High-Efficiency Perovskite Solar Cells

Xu,

Lan,

Chen

et al. 2024

Materials

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Planar perovskite solar cells (PSCs), as a promising photovoltaic technology, have been extensively studied, with strong expectations for commercialization. Improving the power conversion efficiency (PCE) of PSCs is necessary to accelerate their practical application, in which the electron transport layer (ETL) plays a key part. Herein, a single-anchored ligand of phenylphosphonic acid (PPA) is utilized to regulate the chemical bath deposition of a TiO2 ETL, further improving the PCE of planar PSCs. The PPA possesses a steric benzene ring and a phosphoric acid group, which can inhibit the particle aggregation of the TiO2 film through steric hindrance, leading to optimized interface (ETL/perovskite) contact. In addition, the incorporated PPA can induce the upshift of the Fermi-level of the TiO2 film, which is beneficial for interfacial electron transport. As a consequence, the PSCs with PPA-TiO2 achieve a PCE of 24.83%, which is higher than that (24.21%) of PSCs with TiO2. In addition, the unencapsulated PSCs with PPA-TiO2 also exhibit enhanced stability when stored in ambient conditions.

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Energy level modulation of TiO₂ using amino trimethylene phosphonic acid for efficient perovskite solar cells with an average V_OC of 1.19 V

Abstract: The performance of planar perovskite solar cells (PSCs) is closely linked to the charge extraction and transfer in electron transporting layers (ETLs). To achieve a good control of the photoelectric...

Cited by 2 publications

References 41 publications

Homogenizing the Electron Extraction via Eliminating Low‐Conductive Contacts Enables Efficient Perovskite Solar Cells with Reduced Up‐Scaling Losses

Homogenizing the Electron Extraction via Eliminating Low‐Conductive Contacts Enables Efficient Perovskite Solar Cells with Reduced Up‐Scaling Losses

Regulating TiO2 Deposition Using a Single-Anchored Ligand for High-Efficiency Perovskite Solar Cells

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