Synthesis and optical characterization of a high-quality ZnS substrate for optoelectronics and UV solar-energy conversion

Abstract

A high-grade cubic ZnS substrate crystal with longer range order and a strong band-edge emission was clearly demonstrated.

Synthesis and Optical Characterization of Oxygen-Incorporated ZnS(1–x)Ox for UV–Visible Color Palette Light-Emission Matter

“…772100 (marked as the top green line in Figure 3a) for a cubic ZnS with zinc-blende structure. 20 In addition, the XRD results of ZnS 0.94 O 0.06 and ZnS 0.88 O 0.12 indicated that most of the crystal structures belong to ZB, whereas three additional peaks of W(101) at ∼26.69°, W(002) at ∼28.38°, and W(100) at ∼30.68° can be detected by the oxygen-contained samples of ZnS 0.94 O 0.06 and ZnS 0.88 O 0.12 . The diffraction peaks are similar to those of the wurtzite (W) phase compound as referred to JCPDS No.…”

“…For undoped ZnS, a lot of peak modes have been detected at 300 K, which are all indexed to the cubic phase of zinc-blende ZnS. 20,24,25 The most prominent peak is the longitudinal optical phonon mode (LO ∼ 349 cm –1 ) occurred at the Γ center point of the phonon-band Brillouin zone. 25 The other representative peak of ZnS is the transverse optical (TO) phonon at ∼272 cm –1 .…”

“…The BECs may contain biexciton XX (surface exciton SX), neutral-donor-bound exciton D 0 X , and neutral-acceptor-bound exciton A 0 X that had ever been detected by previously pure ZnS. 20 For the free-exciton emission Fx, the peak values are 3.784 eV for ZnS 0.88 O 0.12 , 3.787 eV for ZnS 0.94 O 0.06 , and 3.796 eV 29 for ZnS. The appearance of Fx emission indicates high crystalline quality of the as-grown ZnS (1– x ) O x series crystals.…”

“…For the low-temperature and temperature-dependent PL measurements, a He-compressed RMC 22 closed-cycle refrigerator equipped with a thermometer controller facilitated the experiments. 20 For the observation and record of the color-emission images of the ZnS (1– x ) O x samples, the temperature was kept low for getting strong defect emissions from the crystals. The color-emission images were recorded by a digital camera during the low-temperature measurement of PL spectra with a 266 nm laser excitation.…”

Optical Study of High Quality c -ZnS Crystals for UV Photodiodes and Photoelectrochemical Applications

“…To further identify the high crystal quality of the {111} c ‐ZnS plate, temperature dependent TR measurement near band edge has also been carried out. Because the similarity on ionic arrangement and energy states of the ZB {111} and wurtzite {0001}, the band edge transitions of {111} c ‐ZnS can also be divided into three transitions of E A , E B , and E C owing to the crystal field and spin orbit coupling …”