Broad-band-enhanced and minimal hysteresis perovskite solar cells with interfacial coating of biogenic plasmonic light trapping silver nanoparticles

Effect of Biosynthesized Silver Nanoparticles on The Optical, Structural, and Morphological Properties of TiO2 Nanocrystals

“…The band gap energy of the TiO 2 without AgNPs was 3.20 eV (see Figure 1d). Similar results have been reported by other researchers [1,3,24]. Upon incorporation of different µL of AgNPs, the band gaps were reduced to be 2.78, 2.58, 2.01, 2.19 and 2.44 eV for TiO 2 , TiO 2 /AgNPs1, TiO 2 /AgNPs2, TiO 2 /AgNPs3, TiO 2 /AgNPs4 and TiO 2 /AgNPs5 as depicted in Figure 1d.…”

“…On close inspection of the spectrum, the AgNPs shows a broad band with a visible peak observed at 465 nm which correspond to the plasmonic absorption of AgNPs [3,[17][18][19][20]. The surface plasmon resonance effect is due to the mutual oscillation of conduction electrons which are in resonance with the light wave.…”

“…We can attribute the possible reason of decrease in optical film density with increase in AgNPs content to this reason. The disparities in the transmittance of the film can be seen to arise mainly from the presence of different amount of AgNPs (50, 100, 150, 200, and 250 µL) introduced which results in inconsistencies in surface morphology, crystal size, and transmittance to light scattering [3,22].…”

“…Titanium dioxide (TiO 2 ) is a highly studied semiconductor due to its optoelectronic nature and high chemical stability [1] and has been proven to be one of the materials that have found applications in sensors, antireflective coatings, electrochromic devices, solar energy conversion [2] etc. Nanocrystalline TiO 2 is classified as one of the successful nanomaterials applied for photocatalytic and photoelectrochemical [3]. One of the disadvantages of TiO 2 is its wide band gap (for anatase phase is E g = 3.2 eV, for rutile is 3.0 eV) that have made the absorption coefficient limited for applications in the visible region of the electromagnetic spectrum.…”

Nanomaterial-based probes for iodide sensing: synthesis strategies, applications, challenges, and solutions

“…Multiple methods can be employed to detect and analyze such changes in the optical properties of AgNPs, including UV-vis spectroscopy for assessing absorption spectra and monitoring shifts or intensity variations, and advanced techniques, such as surface-enhanced Raman spectroscopy and fluorescence spectroscopy to enhance detection sensitivity and selectivity. 89 A straightforward, selective, sensitive, and cost-effective colorimetric sensor was developed to detect iodide ions using AgNPs synthesized from green tea ( Camellia sinensis ), called tea-capped AgNPs, 90 as shown in Fig. 9(a).…”