Na role during sulfurization of NaF/Cu/SnS 2 stacked precursor for formation of Cu 2 SnS 3 thin film as absorber of solar cell

Suzuki, Koichi; Chantana, Jakapan; Minemoto, Takashi

doi:10.1016/j.apsusc.2017.04.099

Cited by 31 publications

(14 citation statements)

References 25 publications

(33 reference statements)

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“…Cu 2 SnS 3 (CTS), which is composed of earth‐abundant and non‐toxic elements, has been reported to have a direct band gap and a high optical absorption coefficient, which makes it a promising material for solar cells. CTS‐based thin‐film solar cells with power conversion efficiencies of over 4% have been reported by several research groups, and Chantana et al recently reported an improved efficiency of 4.8%.…”

Section: Introductionmentioning

confidence: 96%

“…The crystal structure of CTS used for solar cell absorbers is monoclinic with Cc symmetry. The band gap energy for monoclinic CTS has been experimentally determined to be 0.91–0.94 eV and 0.98–1.04 eV based on double absorption bands from optical absorption spectra of thin‐film samples and external quantum efficiency measurements of photovoltaic devices . In theoretical investigations, first‐principles calculations of monoclinic CTS have been reported by several groups .…”

Section: Introductionmentioning

confidence: 99%

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Excitonic and Band‐to‐Band Transitions in Temperature‐Dependent Optical Absorption Spectra of Cu₂SnS₃ Thin Films

Aihara

Araki

Tanaka

2017

Physica Status Solidi (b)

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Temperature‐dependent optical absorption spectra from transmittance and reflectance measurements of Cu2SnS3 (CTS) thin films which are promising material for solar cells were investigated. Thin film CTS samples with Cu‐poor, near‐stoichiometric, and Cu‐rich compositions were prepared on glass substrates by thermal co‐evaporation and sulfurization. At low temperature, three band‐to‐band (BB) transitions that are allowed between triple upper valence bands and a single lower conduction band were observed for all samples. The square of the product of the absorption coefficient and the photon energy was plotted to estimate the band gap energy for three bands of the Cu‐poor sample. On the other hand, excitonic (EX) transitions that corresponded to three bands were observed for the Cu‐rich and near‐stoichiometric samples. Temperature‐dependent optical absorption spectra with the triple BB and EX transitions were resolved using a simplified fitting equation with Lorentzian functions as the EX transitions. The band gap, EX transition, and exciton binding energies for the lowest energy band of the Cu‐rich sample were determined to be 0.945 eV, 0.936 eV, and 8.9 meV at 6 K, respectively. In the low‐temperature region, anomalous blue‐shifts of the estimated band gap energy with increasing temperature were obtained for three bands of all samples.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Excitonic and Band‐to‐Band Transitions in Temperature‐Dependent Optical Absorption Spectra of Cu₂SnS₃ Thin Films

Aihara

Araki

Tanaka

2017

Physica Status Solidi (b)

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“…Based on Williamson Hall method, the sulfurized ST sample has the highest D among all the sulfurized samples. This may be due to the Na ions CTS doping from the sodium thiosulfate (ST) that has a signi cant impact on enlarging the formation of CTS crystalline grains as previously reported [54]. The negative strain results calculated for all sulfurized samples indicate that the crystals are grown under compressive stress [55].…”

Section: Structural Analysismentioning

confidence: 55%

Effect of Sulfur Precursors on Crystallographic, Optical, and Electrical Properties of Cu2SnS3 Nanoparticles

Abdel-Latif

Rezk

Abdel-Moniem

et al. 2021

Preprint

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In this study, the synthesis of Cu2SnS3 (CTS) nanoparticles by solvothermal method using different sulfur precursors is reported. The influence of sulfur precursors on the structure, optical and electrical properties of prepared CTS material is investigated. The sulfur precursor sources have showed a noticeable effect on crystallite size, secondary phases, and resulted CTS nanoparticles structure. Among the four sulfur precursor sources used in this study, thiourea is the only sulfur source that produces CTS with a cubic structure and without the need for thermal treatment. Whereas after sulfurization at 580 ºC, all the four samples attained CTS nanoparticles with diverse properties. Changing the sulfur precursors have clear effects on crystallite size and optical bandgap prepared samples as they ranged from 11.21 to 21.23 nm and from 1.4 to 1.7 eV, respectively. Additionally, Hall effect measurement revealed that all CTS samples are p-type semiconductors with bulk carrier concentrations in 1018 order, which is suitable for various optoelectronic applications such as photovoltaics and photodetectors.

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“…This group of TMDs encompasses MoS 2 , WS 2 , and WSe 2 , which appear to be forerunners in the fields of catalysis, , energy storage and conversion, , electronics, , optoelectronics, , and sensors. − Like these TMDs, SnS 2 is also a layered metal dichalcogenide (LMD) consisting of covalently bonded in-plane atoms, and successive layers are held together by van der Waals forces . Due to an optical bandgap in the range of 2.1–2.4 eV, SnS 2 turns out to be a promising candidate in the domains of photovoltaics , and photocatalysis. − Besides, SnS 2 is known for its electrochemical properties with application potential as an anode material in Li-ion batteries and a catalyst for CO 2 electroreduction. , …”

Section: Introductionmentioning

confidence: 99%

Crystalline Tin Disulfide by Low-Temperature Plasma-Enhanced Atomic Layer Deposition as an Electrode Material for Li-Ion Batteries and CO₂ Electroreduction

Mathew,

Van den Hoek,

Poonkottil

et al. 2023

ACS Appl. Energy Mater.

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Na role during sulfurization of NaF/Cu/SnS 2 stacked precursor for formation of Cu 2 SnS 3 thin film as absorber of solar cell

Cited by 31 publications

References 25 publications

Excitonic and Band‐to‐Band Transitions in Temperature‐Dependent Optical Absorption Spectra of Cu₂SnS₃ Thin Films

Excitonic and Band‐to‐Band Transitions in Temperature‐Dependent Optical Absorption Spectra of Cu₂SnS₃ Thin Films

Effect of Sulfur Precursors on Crystallographic, Optical, and Electrical Properties of Cu2SnS3 Nanoparticles

Crystalline Tin Disulfide by Low-Temperature Plasma-Enhanced Atomic Layer Deposition as an Electrode Material for Li-Ion Batteries and CO₂ Electroreduction

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Na role during sulfurization of NaF/Cu/SnS 2 stacked precursor for formation of Cu 2 SnS 3 thin film as absorber of solar cell

Cited by 31 publications

References 25 publications

Excitonic and Band‐to‐Band Transitions in Temperature‐Dependent Optical Absorption Spectra of Cu2SnS3 Thin Films

Excitonic and Band‐to‐Band Transitions in Temperature‐Dependent Optical Absorption Spectra of Cu2SnS3 Thin Films

Effect of Sulfur Precursors on Crystallographic, Optical, and Electrical Properties of Cu2SnS3 Nanoparticles

Crystalline Tin Disulfide by Low-Temperature Plasma-Enhanced Atomic Layer Deposition as an Electrode Material for Li-Ion Batteries and CO2 Electroreduction

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Product

Resources

About

Excitonic and Band‐to‐Band Transitions in Temperature‐Dependent Optical Absorption Spectra of Cu₂SnS₃ Thin Films

Excitonic and Band‐to‐Band Transitions in Temperature‐Dependent Optical Absorption Spectra of Cu₂SnS₃ Thin Films

Crystalline Tin Disulfide by Low-Temperature Plasma-Enhanced Atomic Layer Deposition as an Electrode Material for Li-Ion Batteries and CO₂ Electroreduction