Effect of interface incorporation of cadmium nanocrystallites on the photovoltaic performance of solar cells based on CdS/Si multi-interface nanoheterojunction

Influence of Buffer Agent Concentration on the Optical Properties from CdS Nanocrystals on Silicon Nanoporous Pillar Array

“…With increasing the buffer agent concentration, the flocculation is vanished and the size of the particles is decreasing. Under the buffer agent concentration of 0.10 mol L −1 , the average size of particles is ∼190 nm [13]. However, with the concentration of 0.15 mol L −1 the average size of particles is estimated to be ∼110 nm and CdS thin films can be observed to be uniformly covered on the pillars and valleys.…”

“…From Figure 1, it can be seen that the full width at half maximum (FWHM) of the (002) diffraction peaks for CdS nanocrystals is increased correspondingly with the increasing concentration of buffer agent. According to the principle of XRD, the increase of FWHM might reflect the decrease of the average size of nanocrystals [13]. Based on Scherrer's formula [6] and the data corresponding to the (002) diffraction peaks, the average sizes of CdS nanocrystals with the different concentration of buffer agent are calculated as ∼26.9 nm, ∼19.2 nm, ∼11.6 nm, and ∼8.1 nm, respectively.…”

“…These can be explained from the increasing film thickness. As we know, CdS nanocrystals are located at the interface of nc-CdS and Si-NPA [9,13,14]. Then, the thicker CdS films impede the penetration of X-ray into nc-Cd and lead to the decrease of the diffraction peak intensity from Cd nanocrystallites.…”

“…In our previous works, we have synthesized CdS nanocrystals on the silicon nanoporous pillar array (CdS/Si-NPA) by the CBD method. Based on CdS/Si-NPA, light-emitting diodes and photovoltaic devices have been investigated [13,14]. However, the low quantum efficiency and energy conversion efficiency can be observed.…”

Yeast-based genome mining, production and mechanistic studies of the biosynthesis of fungal polyketide and peptide natural products

“…5), and each step of the pathway has been assigned with a designated gene. 19 Afua_8g00170, whose homolog in A. fumigatus BM939 is FtmA, is an NRPS that performs the rst step of the pathway involving the condensation of L-tryptophan and L-proline to form brevianamide F. 20 Afua_8g00210/FtmB catalyzes prenylation of brevianamide F at the C2 position of the indole ring to yield tryprostatin B. 21 Subsequently, a P450, Afua_8g00190/FtmC, performs aromatic hydroxylation of tryprostatin B to give desmethyltryprostatin A.…”