Absorption Edge of Zn₃P₂ at 5, 80, and 300 K

Abstract

Absorption Edge of Zn3P+ at 5, 80, and 300 K 2) B Y J.M. PAWLIKWSKI, J. MISIEWICZ, N. MIRWSKA, a n d P . BECLA I I VZinc phosphide Zn P is a weakly investigated semiconductor compound of A B type and its energy-band structure is not well known at present / u~) .On the other side, it has interesting photoelectric properties /2/. F o r these reasons absorption

A Determination of the Band Gap of Zn3P2

“…A linear extrapolation of the steep rise in Fig. l(a) down to zero, in the manner applied to the photoconductivity measurements in [6], gives an energy gap of 1.3 1 eV, whichis rather near other results [4,8]. Another possible explanation of the discrepancies may be different purity of the samples.…”

“…According to the shape of the spectrum it seems unlikely that the absorption in this case involves an impurity level below the conduction band. However, in [8] is shown a quite high residual absorption (a = 100 cm-') down to 1.25 eV. A linear extrapolation of the steep rise in Fig.…”

Insights from density functional theory calculations into the effects of the adsorption and dissociation of water on the surface properties of zinc diphosphide (ZnP2) nanocrystals

“…From a recent cost-benefit analysis performed on a number of Earth-abundant semiconducting materials, zinc phosphides have been proposed to be among the most promising materials for large-scale PV applications with a significant cost-reduction over crystalline silicon. 12 Tetragonal Zn3P2 has recently seen a resurgence of interest for cost-effective and scalable thin-film PV devices, owing to its direct bandgap of 1.5 eV 13 , high visible-light absorption coefficient (>10 4 cm −1 ) 14 , long minority-carrier diffusion length (~10 μm) 15 , high extinction coefficient 16 , and large range of potential doping concentrations (10 13 −10 18 cm −3 ). 17 Zinc diphosphide (ZnP2), which crystallizes in two distinct polymorphs, the tetragonal α-ZnP2 (red) and monoclinic β-ZnP2 (black), has, on the other hand, received limited attention for PV applications.…”