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

Kottayi, Roopakala; Veerappan, Ilangovan; Sittaramane, Ramadasse

doi:10.3762/bjnano.13.110

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…A single PL The same group slightly modified the colloidal hot-injection method by using an S and Se stock solution in DDT/OA instead of S to synthesize quinary Ag-Zn-Ga-S-Se alloyed QDs. The as-prepared QDs show a wide absorption range in the NIR region with an E g of 1.37 eV, which confirms that these QDs are effective sensitizers [70]. A single PL emission peak from 830 to 880 nm with an fwhm of 20 nm was observed.…”

Section: Ag-ga-s(se) (Ags(se)) and Ag-ga-zn-s(se) (Agzs(se)) Qdssupporting

confidence: 58%

“…The same group slightly modified the colloidal hot-injection method by using an S and Se stock solution in DDT/OA instead of S to synthesize quinary Ag-Zn-Ga-S-Se alloyed QDs. The as-prepared QDs show a wide absorption range in the NIR region with an Eg of 1.37 eV, which confirms that these QDs are effective sensitizers [70]. A single PL The same group slightly modified the colloidal hot-injection method by using an S and Se stock solution in DDT/OA instead of S to synthesize quinary Ag-Zn-Ga-S-Se alloyed QDs.…”

Section: Ag-ga-s(se) (Ags(se)) and Ag-ga-zn-s(se) (Agzs(se)) Qdsmentioning

confidence: 73%

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Selected I-III-VI2 Semiconductors: Synthesis, Properties and Applications in Photovoltaic Cells

Shishodia,

Chouchene,

Gries

et al. 2023

Nanomaterials

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I–III–VI2 group quantum dots (QDs) have attracted high attention in photoelectronic conversion applications, especially for QD-sensitized solar cells (QDSSCs). This group of QDs has become the mainstream light-harvesting material in QDSSCs due to the ability to tune their electronic properties through size, shape, and composition and the ability to assemble the nanocrystals on the surface of TiO2. Moreover, these nanocrystals can be produced relatively easily via cost-effective solution-based synthetic methods and are composed of low-toxicity elements, which favors their integration into the market. This review describes the methods developed to prepare I-III-VI2 QDs (AgInS2 and CuInS2 were excluded) and control their optoelectronic properties to favor their integration into QDSSCs. Strategies developed to broaden the optoelectronic response and decrease the surface-defect states of QDs in order to promote the fast electron injection from QDs into TiO2 and achieve highly efficient QDSSCs will be described. Results show that heterostructures obtained after the sensitization of TiO2 with I-III-VI2 QDs could outperform those of other QDSSCs. The highest power-conversion efficiency (15.2%) was obtained for quinary Cu-In-Zn-Se-S QDs, along with a short-circuit density (JSC) of 26.30 mA·cm−2, an open-circuit voltage (VOC) of 802 mV and a fill factor (FF) of 71%.

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Section: Ag-ga-s(se) (Ags(se)) and Ag-ga-zn-s(se) (Agzs(se)) Qdssupporting

confidence: 58%

Section: Ag-ga-s(se) (Ags(se)) and Ag-ga-zn-s(se) (Agzs(se)) Qdsmentioning

confidence: 73%

Selected I-III-VI2 Semiconductors: Synthesis, Properties and Applications in Photovoltaic Cells

Shishodia,

Chouchene,

Gries

et al. 2023

Nanomaterials

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“…The band gap energy was estimated by tauc plot [12,13] (plotting (αhυ) 2 of the Ag NPs against the photon energy (hυ)), as shown in the Fig. 5 .…”

Section: Figure 1 Xrd Pattern Of Silver Nanoparticlesmentioning

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.

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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.

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Manganese incorporated earth-abundant copper and tin-based metal chalcogenides QDs on solar absorption of photovoltaic cells

Kottayi,

Ilangovan,

Ilangovan

et al. 2023

Chemical Physics Letters

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

Cited by 3 publications

References 36 publications

Selected I-III-VI2 Semiconductors: Synthesis, Properties and Applications in Photovoltaic Cells

Selected I-III-VI2 Semiconductors: Synthesis, Properties and Applications in Photovoltaic Cells

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

Manganese incorporated earth-abundant copper and tin-based metal chalcogenides QDs on solar absorption of photovoltaic cells

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