A new D-A-D type benzodithiazole-based hole transport material for Sn-Pb perovskite solar cells with high efficiency and stability

Article Chemistry, Multidisciplinary

Gradient Doping in Sn-Pb Perovskites by Barium Ions for Efficient Single-Junction and Tandem Solar Cells

Zhenhua Yu et al.

Summary: This study demonstrates the formation of a p-n homojunction in Sn-Pb perovskites by introducing gradient doping with barium ions, which enhances the efficiency of perovskite solar cells.

ADVANCED MATERIALS (2022)

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Article Chemistry, Applied

The strategy for high-efficiency hole conductors by engineering short-range intramolecular interactions

Yuan Sun et al.

Summary: Introducing short-range intramolecular interactions effectively improved the molecular planarity and carrier mobility of hole transporting materials for perovskite solar cells. This strategy deepened the HOMO energy level, raised the Voc, and ultimately achieved high efficiency in PSCs.

DYES AND PIGMENTS (2022)

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Article Multidisciplinary Sciences

All-perovskite tandem solar cells with improved grain surface passivation

Renxing Lin et al.

Summary: Researchers have developed ammonium-cation-passivated Pb-Sn perovskites with long diffusion lengths, enabling high-efficiency all-perovskite tandem solar cells. By enhancing the adsorption of the passivator using a stronger surface-passivator interaction, the carrier diffusion length within Pb-Sn perovskites is doubled, resulting in an efficiency of over 22%. The certified efficiency of 26.4% achieved in the all-perovskite tandem solar cells exceeds that of the best-performing single-junction perovskite solar cells.

NATURE (2022)

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Article Multidisciplinary Sciences

Constructing heterojunctions by surface sulfidation for efficient inverted perovskite solar cells

Xiaodong Li et al.

Summary: A stable perovskite heterojunction was achieved in inverted solar cells by sulfidating the surface of lead-rich perovskite films, resulting in improved power conversion efficiency and open-circuit voltage.

SCIENCE (2022)

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Review Chemistry, Physical

Design of dopant-free small molecular hole transport materials for perovskite solar cells: a viewpoint from defect passivation

Wanhai Wang et al.

Summary: This review discusses recent advances in undoped hole transport materials (HTMs) for perovskite solar cells, proposes design strategies for improving the performance of PVSCs, and examines the correlation between molecular structures and device performance and stability. The development of dopant-free small organic HTMs is considered a promising approach for achieving efficient and stable PVSCs towards commercialization.

JOURNAL OF MATERIALS CHEMISTRY A (2022)

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Article Chemistry, Physical

Tin-Lead Perovskite Solar Cells Fabricated on Hole Selective Monolayers

Gaurav Kapil et al.

Summary: According to research, the power conversion efficiency of tin-lead perovskite solar cells can be improved by using specific hole transport layers. By using substances such as 2PACz and MPA, comparable performance to traditional PEDOT:PSS can be achieved. Experimental results showed that coabsorption of 2PACz and MPA on the transparent conducting oxide layer can further enhance the performance of tin-lead perovskite solar cells.

ACS ENERGY LETTERS (2022)

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Article Chemistry, Multidisciplinary

Optimized carrier extraction at interfaces for 23.6% efficient tin-lead perovskite solar cells

Shuaifeng Hu et al.

Summary: In this study, carrier extraction in mixed tin-lead perovskite solar cells is improved by modifying the surfaces with ethylenediammonium diiodide and glycine hydrochloride. The modified solar cells show improved performance and stability, with efficiencies of up to 23.6% and retaining over 80% of initial efficiency after 200 hours of continuous operation.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Chemistry, Applied

Facile synthesized fluorine substituted benzothiadiazole based dopant-free hole transport material for high efficiency perovskite solar cell

Yi Tian et al.

Summary: A novel D-A-D structured molecule was synthesized and showed excellent optoelectronic properties and thermal stability. When used as HTM in PSC, it achieved high efficiency and good environmental stability.

DYES AND PIGMENTS (2021)

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Article Chemistry, Physical

Novel thieno-imidazole salt-based hole transport material for dopant-free, efficient inverted perovskite solar cell applications

Suri Babu Akula et al.

Summary: A unique quaternary iodide salt of thieno-imidazole, AI110, was designed, prepared and tested as a dopant-free hole transport material in an inverted architecture perovskite solar cell. The performance of the AI110 HTM was superior to the commonly used HTMs, Spiro-OMeTAD and PEDOT:PSS, due to its significant capabilities of film formation, charge extraction, and hole mobilities. As a result, it reduced current losses and charge recombination, leading to higher power conversion efficiency.

JOURNAL OF POWER SOURCES (2021)

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Article Multidisciplinary Sciences

Nanoscale localized contacts for high fill factors in polymer-passivated perovskite solar cells

Jun Peng et al.

Summary: This research introduces a nanopatterned electron transport layer that overcomes the trade-off between passivation quality and series resistance in traditional polymer passivation layers. Combining the nanopatterned electron transport layer with a dopant-free hole transport layer improves the efficiency and stability of perovskite solar cells.

SCIENCE (2021)

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Article Nanoscience & Nanotechnology

Efficient Inverted Perovskite Solar Cells Enabled by Dopant-Free Hole-Transporting Materials Based on Dibenzofulvene-Bridged Indacenodithiophene Core Attaching Varying Alkyl Chains

Enwei Zhu et al.

Summary: Inspired by spiro-OMeTAD, two novel HTMs, IT-C6 and IT-C8, based on butterfly-shaped triarylamine groups, were synthesized. IT-C6 exhibited higher glass-transition temperature and overall better performance compared to IT-C8. The inverted devices using these HTMs showed high fill factors and promising potential for future applications.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Nanoscience & Nanotechnology

Side-Chain Engineering of Diketopyrrolopyrrole-Based Hole-Transport Materials to Realize High-Efficiency Perovskite Solar Cells

Amit Sharma et al.

Summary: The study investigates the use of diketopyrrolopyrrole-based small molecules as hole-transport materials in perovskite solar cells, revealing the significant impact of different alkyl side-chain substituents on their optical and electrochemical properties and film-forming ability, with D-4 demonstrating the best performance.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Materials Science, Multidisciplinary

Novel D-A-D type small-molecular hole transport materials for stable inverted perovskite solar cells

Zhiming Gong et al.

Summary: New donor-acceptor-donor type carbazole-based small molecules were designed and synthesized in this study, showing improved efficiency and stability in perovskite solar cells through variations in the electron acceptor unit.

ORGANIC ELECTRONICS (2021)

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Article Chemistry, Applied

Pyridine-triphenylamine hole transport material for inverted perovskite solar cells

Shuang Ma et al.

Summary: A facile star-shaped hole transport material (HTM) incorporating pyridine core (H-Pyr) was designed and synthesized, showing better hole mobility and well-matched work function compared with a benzene core HTM (H-Ben). The perovskite solar cells using H-Pyr exhibited improved crystallization, charge extraction, and reduced recombination, resulting in higher efficiency and long-term stability compared to H-Ben-based cells. Doping with a Lewis acid further enhanced the efficiency of the H-Pyr-based devices, making them a promising alternative to conventional HTMs like PEDOT:PSS.

JOURNAL OF ENERGY CHEMISTRY (2021)

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Article Chemistry, Multidisciplinary

Heterogeneous 2D/3D Tin-Halides Perovskite Solar Cells with Certified Conversion Efficiency Breaking 14%

Bin-Bin Yu et al.

Summary: By modulating the microstructure of 2D/3D heterogeneous tin-perovskite absorber films through substituting FAI with FPEABr, the oxidation of Sn2+ to Sn4+ and defect density were effectively suppressed, leading to a remarkable increase in conversion efficiency from 9.38% to 14.81%.

ADVANCED MATERIALS (2021)

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Article Chemistry, Applied

Selenium-containing D-A-D-type dopant-free hole transport materials for perovskite solar cells

Yajie Fu et al.

Summary: A novel selenium-containing D-A-D-type dopant-free hole-transport material was designed and applied in a perovskite solar cell (PSC) with high efficiency and long-term stability. Systematic investigation on the impact of chalcogen atom variation in the dopant-free hole-transport materials was conducted, demonstrating the superiority of the selenium-containing organic compounds in PSC applications.

DYES AND PIGMENTS (2021)

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Article Materials Science, Multidisciplinary

Grain size control for high-performance formamidinium-based perovskite solar cells via suppressing heterogenous nucleation

Xiaoxiao Xu et al.

Summary: Research focused on modulating the nucleation rate by introducing modifiers into precursor solutions to obtain high-quality perovskite films with large grain size and low-defect density, resulting in improved performance of FAPbI(3)-based PSCs. The modified PSCs achieved a high power-conversion efficiency of 20.15% and maintained about 92% of the initial efficiency in an air atmosphere.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

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Article Chemistry, Applied