Positive Role of Inhibiting CZTSSe Decomposition on Intrinsic Defects and Interface Recombination of 12.03% Efficient Kesterite Solar Cells

Article Chemistry, Multidisciplinary

Band-gap-graded Cu2ZnSn(S,Se)4 drives highly efficient solar cells

Hongling Guo et al.

Summary: The bandgap-graded absorber layer was successfully realized in the CZTSSe film through sufficient annealing during the deposition of an Al-doped ZnO film, promoting solid-state ion-exchange reaction at the heterojunction interface.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Article Energy & Fuels

Effect of Self-Seed Inducing on the Growth Mechanism and Photovoltaic Performance of Cu2ZnSnSe4 Thin Films

Yunfeng Liang et al.

Summary: By controlling the proportion and distribution of metal precursors, a self-seed inducing effect can be achieved during soft selenization, resulting in improved efficiency and reduced open circuit voltage deficit for CZTSe solar cells.

SOLAR RRL (2022)

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Article Chemistry, Multidisciplinary

N-Type Surface Design for p-Type CZTSSe Thin Film to Attain High Efficiency

Yali Sun et al.

Summary: By utilizing n-type Ag2ZnSnS4 to design the CZTSSe absorber for surface modification, Ag was found to play crucial roles in kesterite thin film devices, leading to improved performance of the solar cell with an efficiency of up to 12.55% and reducing the open-circuit voltage deficit to 0.306 V.

ADVANCED MATERIALS (2021)

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Article Chemistry, Physical

High Efficiency Cu2ZnSn(S,Se)4 Solar Cells with Shallow LiZn Acceptor Defects Enabled by Solution-Based Li Post-Deposition Treatment

Mingrui He et al.

Summary: The incorporation of lithium in kesterite Cu2ZnSn(S,Se)(4) (CZTSSe) materials has been experimentally proven to improve electronic quality in photovoltaic devices. A solution-based lithium post-deposition treatment was reported to further enhance efficiency by uniformly incorporating lithium into grain interiors, leading to a significant efficiency boost from 9.3% to 10.7%.

ADVANCED ENERGY MATERIALS (2021)

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Article Chemistry, Physical

Efficient and Composition-Tolerant Kesterite Cu2ZnSn(S, Se)4 Solar Cells Derived From an In Situ Formed Multifunctional Carbon Framework

Xiao Xu et al.

Summary: Broadening the processing window is crucial for efficient CZTSSe solar cells. This study presents a new approach using TGA-ammonia based water solution method to achieve high efficiency CZTSSe solar cells, revealing the importance of a conductive carbon framework layer and the phase-segregation growth behavior of CZTSSe grains in improving cell performance. This provides new insights into regulating crystal growth of CZTSSe film for enhanced cell efficiency.

ADVANCED ENERGY MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Ag Incorporation with Controlled Grain Growth Enables 12.5% Efficient Kesterite Solar Cell with Open Circuit Voltage Reached 64.2% Shockley-Queisser Limit

Yuancai Gong et al.

Summary: By incorporating Ag into kesterite through a DMSO solution, this study successfully promoted grain growth, resulting in a uniform and less defective absorber.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Review Chemistry, Applied

Interface engineering of p-n heterojunction for kesterite photovoltaics: A progress review

Mingrui He et al.

Summary: Kesterite Cu2ZnSn(S,Se)(4) (CZTSSe) is a promising thin-film photovoltaic technology with tunable bandgap, but its efficiency is still below the theoretical limit. The characteristics of buffer layers and interfaces play a key role in efficiency improvement. Future improvements should focus on altering interface characteristics towards achieving the ideal interface.

JOURNAL OF ENERGY CHEMISTRY (2021)

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Article Energy & Fuels

Realization of 11.5% Efficiency Cu2ZnSn(S,Se)4 Thin-Film Solar Cells by Manipulating the Phase Structure of Precursor Films

Bin Xu et al.

Summary: The influence of the composition and phase distribution of the precursor thin film on the defect and performance of Cu2ZnSn(S,Se)(4) solar cells was studied in this research. By modifying the distribution of composition and phase for precursor films, a Cu2ZnSn(S,Se)(4) absorber layer without secondary phase and with fewer detrimental defects can be obtained, significantly improving the photovoltaic performance of CZTSSe thin-film solar cells. The research has led to the preparation of a Cu2ZnSn(S,Se)(4) solar cell with 11.51% power conversion efficiency.

SOLAR RRL (2021)

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Article Energy & Fuels

Interface Recombination of Cu2ZnSnS4 Solar Cells Leveraged by High Carrier Density and Interface Defects

Jianjun Li et al.

Summary: The study identified critical factors governing the interface recombination in CZTS solar cells, including the carrier density of the absorber and acceptor-like interface defects. Eliminating interface defects and adjusting absorber carrier density are essential ways to improve the performance of CZTS solar cells.

SOLAR RRL (2021)

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Article Chemistry, Multidisciplinary

Identifying the origin of the Voc deficit of kesterite solar cells from the two grain growth mechanisms induced by Sn2+ and Sn4+ precursors in DMSO solution

Yuancai Gong et al.

Summary: By investigating the grain growth mechanism of Cu2ZnSn(S,Se)(4) solar cells, this study reveals that the large voltage deficit issue limiting kesterite solar cell efficiency mainly originates from surface deep defects, and high efficiency (>12%) and low V-oc deficit (<300 mV) of Sn4+ processed CZTSSe solar cells highlight a new strategy for fabricating high quality kesterite absorbers.

ENERGY & ENVIRONMENTAL SCIENCE (2021)

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Article Chemistry, Multidisciplinary