Cu2AgInS4 quantum dot sensitized zinc doped Titania nanoparticles film as the high efficient photoanode for photovoltaic cells

Kottayi, Roopakala; Ilangovan, V.; Sittaramane, Ramadasse

doi:10.1016/j.ijleo.2022.168692

Cited by 5 publications

(3 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…04-0783) [6,7] and earlier published literature [8,9] The extreme peak positions indicate that the black-coloured powder formed exhibits high crystallinity and small particle size. The crystallite size was calculated by using the Scherrer formula [10,11] with Origin software, as described previously, which was found to be ~14 nm. The XRD spectrum displayed only Ag peaks, without any other chemical impurities, further indicating the purity of the sample.…”

Section: Resultsmentioning

confidence: 99%

Biosynthesis of silver nanoparticles using green tea leaf extract and their structural and optical analysis

Senthamizh Selvi S,

V Ilangovan,

Roopakala Kottayi

2024

Int. J. Sci. Res. Arch.

View full text Add to dashboard Cite

In the present study, silver nanoparticles (Ag NPs) were synthesized by biosynthesis method using Green tea leaf extract. Biosynthesis is an easy, economical, and environmentally friendly method to prepare NPs. The synthesized NPs were characterized by using an X-ray diffraction spectrum (XRD), UV-Vis spectra, Tauc plot and Dynamic light scattering spectrum analysis. The XRD results of biosynthesized Ag NPs show that the particles are crystalline and face-cantered cubical in shape, with an average size of 14 nm. UV-visible spectra studies and Tauc plot analysis confirm the excellent optical properties of the Ag NPs. Due to these outstanding qualities, we anticipated that the use of green-produced Ag NPs would result in an exponential increase in various applications. Ag NPs exhibit cytotoxicity and anticancer characteristics, antibacterial, antioxidant, and antifungal activity.

show abstract

Section: Resultsmentioning

confidence: 99%

Biosynthesis of silver nanoparticles using green tea leaf extract and their structural and optical analysis

Senthamizh Selvi S,

V Ilangovan,

Roopakala Kottayi

2024

Int. J. Sci. Res. Arch.

View full text Add to dashboard Cite

show abstract

“…Earlier reports revealed that Cu 2 S is a low-cost and efficient counter electrode (CE) for QDSCs [ 2 , 19 – 20 ]. Hence, in this work Cu 2 S was chosen as the CE material.…”

Section: Methodsmentioning

confidence: 99%

Near-infrared photoactive Ag-Zn-Ga-S-Se quantum dots for high-performance quantum dot-sensitized solar cells

Kottayi¹,

Veerappan²,

Sittaramane³

2022

Beilstein J. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

The high light-harvesting ability of quantum dots (QDs) plays an eminent role in the performance of solar cells. In this study, we synthesized Ag-Zn-Ga-S-Se-based alloyed QDs by colloidal hot injection and characterized them. The X-ray photoelectron spectrum analysis confirms the +1, +2, +3, −2, and −2 oxidation states of, respectively, Ag, Zn, Ga, S, and Se in the QDs, and the energy-dispersive X-ray spectrum analysis confirms the 1:1:1:1.5:1.5 stoichiometric ratio of, respectively, Ag, Zn, Ga, S, and Se. These two results indicate the formation of I-II-III-VI3-type alloyed crystals (AgZnGaS1.5Se1.5 nanocrystals). TEM image analysis reveals the QD nature of the synthesized Ag-Zn-Ga-S-Se nanocrystals. The X-ray diffraction pattern confirms the hexagonal structure. Due to the near-infrared light absorption capability, the synthesized QDs were used as the sensitizer to fabricate QDSCs. The fabricated QDSCs were characterized by using electrochemical impedance spectroscopy and photovoltaic performance studies. The fabricated QDSC have superior electrochemical activity with a photoconversion efficiency of 4.91%.

show abstract

“…Materials used for this strategy include metal oxides (CuO, [42] Bi 2 O 3 , [43] In 2 O 3 [44] ), metal sulphides and selenides (Ni 2 S 3 , [45] Bi 2 S 3 , [46] CdS, [47] Sb 2 S 3 , [48] Sb 2 Se 3 [49] ), Co(OH) 2 , [50] graphene, [51,52] as well as some ternary and quaternary sulphides and selenides, such as CoNi 2 S 4 , [53] CdIn 2 S 4 , [54] and Cu 2 AgInS 4 . [55] For instance, Park compounded In 2 S 3 on TiO 2 NTs by the hydrothermal method, which could well achieve the absorption of visible light and effective charge separation, thus improving the property of PEC. [56] Li compounded SnIn 4 S 8 on TiO 2 NTs by the solvothermal method, which was found to have high stability and low impedance, contributing to the cathodic protection of Q235.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and research of bi-functional CuNi₂S₄ nanosheets decorated TiO₂/CuNi₂S₄ heterojunction photoanode for photoelectrochemical water splitting

Jin

Zhang

et al. 2023

Chinese Phys. B

View full text Add to dashboard Cite

As a traditional n-type semiconductor, TiO2 has good UV absorption ability and stable physical and chemical properties. However, its wide band gap and low oxygen evolution reaction (OER) activity limit its application in the field of photoelectrochemical (PEC) water splitting. In this work, a type-II TiO2/CuNi2S4 heterojunction photoanode is successfully constructed, which expanded the light absorption range to visible and enhanced the OER activity. Firstly, TiO2 nanotubes (NTs) thin films are prepared on Ti substrates by two-step anodization, and then the bi-functional electrocatalytic material CuNi2S4 is grown on TiO2 NTs in the shape of nanosheets (NSs) in situ by solvothermal method. As a bi-functional electrocatalytic material, CuNi2S4 has good visible light absorption property as well as OER catalytic activity. Compared with TiO2, the IPCE value of TiO2/CuNi2S4 is 2.59% at 635 nm, and that of TiO2 is a mere 0.002%. The separation efficiency and injection efficiency increase from 2.49% and 31.52% to 3.61% and 87.77%, respectively. At 1.23 V vs. RHE, the maximum photocurrent density is 0.26 mA/cm2, which is 2.6 times than that of TiO2 (0.11 mA/cm2), and can be maintained at 0.25 mA/cm2 for at least 2 h under light illumination. Moreover, a hydrogen production rate of 4.21 μmol⋅cm−2⋅h−1 is achieved within 2 h. This work provides a new idea for the application of TiO2 in the field of PEC water splitting and the construction of efficient and stable photoelectronic devices.

show abstract

Cu2AgInS4 quantum dot sensitized zinc doped Titania nanoparticles film as the high efficient photoanode for photovoltaic cells

Cited by 5 publications

References 38 publications

Biosynthesis of silver nanoparticles using green tea leaf extract and their structural and optical analysis

Biosynthesis of silver nanoparticles using green tea leaf extract and their structural and optical analysis

Near-infrared photoactive Ag-Zn-Ga-S-Se quantum dots for high-performance quantum dot-sensitized solar cells

Fabrication and research of bi-functional CuNi₂S₄ nanosheets decorated TiO₂/CuNi₂S₄ heterojunction photoanode for photoelectrochemical water splitting

Contact Info

Product

Resources

About

Cu2AgInS4 quantum dot sensitized zinc doped Titania nanoparticles film as the high efficient photoanode for photovoltaic cells

Cited by 5 publications

References 38 publications

Biosynthesis of silver nanoparticles using green tea leaf extract and their structural and optical analysis

Biosynthesis of silver nanoparticles using green tea leaf extract and their structural and optical analysis

Near-infrared photoactive Ag-Zn-Ga-S-Se quantum dots for high-performance quantum dot-sensitized solar cells

Fabrication and research of bi-functional CuNi2S4 nanosheets decorated TiO2/CuNi2S4 heterojunction photoanode for photoelectrochemical water splitting

Contact Info

Product

Resources

About

Fabrication and research of bi-functional CuNi₂S₄ nanosheets decorated TiO₂/CuNi₂S₄ heterojunction photoanode for photoelectrochemical water splitting