Simulation and characterization of CdTe:Bi crystals grown by the Markov method

Saucedo, Edgardo; Ruiz, Carmen M.; Martínez, O.; Fornaro, L.; Sochinskii, N.V.; Sanz, L.F.; Diéguez, E.

doi:10.1016/j.jcrysgro.2004.11.114

Cited by 16 publications

(7 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(B) As in (A) but after 12 h at 70°C. (C) As in (A) but without the PVP stabilizer, magnification: -1 which are in agreement with values in the literature for this material[20,21].…”

supporting

confidence: 90%

Photoinduced synthesis of CdTe nanoparticles using Te-modified gold electrode in poly(vinyl pyrrolidone)-containing electrolyte

et al. 2007

View full text Add to dashboard Cite

Photocathodic stripping of a pre-deposited tellurium film on a gold electrode in 0.1 M Na 2 SO 4 electrolyte containing Cd 2+ ions and poly(vinyl pyrrolidone) (PVP) was used as a route to the photoelectrosynthesis of CdTe nanoparticles. Thus illumination of a Te-modified gold surface generated Te 2-species, which were removed from the surface into the bulk electrolyte containing Cd 2+ and PVP by vigorous stirring. The reaction of Te 2-and Cd 2+ produced PVP-protected nanosized CdTe particles dispersed in solution in the size range 20-40 nm. In this approach, PVP played a critical role as a stabilizer to form discrete CdTe particles instead of larger (agglomerated) ones. Electrochemical quartz crystal microgravimetry was used to monitor stripping of Te films during the light illumination and the synthesized CdTe nanoparticles were characterized by scanning electron microscopy, energy dispersive X-ray analyses and laser Raman spectroscopy.

show abstract

“…(B) As in (A) but after 12 h at 70°C. (C) As in (A) but without the PVP stabilizer, magnification: -1 which are in agreement with values in the literature for this material[20,21].…”

supporting

confidence: 90%

Photoinduced synthesis of CdTe nanoparticles using Te-modified gold electrode in poly(vinyl pyrrolidone)-containing electrolyte

et al. 2007

View full text Add to dashboard Cite

show abstract

“…The detection of phase formation (such as CdIn 2 Te 4 ), or the study of the impurities presence (such as zinc − or bismuth in CdTe alloys) is also possible by this technique. Moreover Raman spectroscopy studies can be carried out in situ in order to follow the growing of a phase in real time or to study an electrolyte/solid interface .…”

Section: Introductionmentioning

confidence: 99%

Raman Characterization of a New Te-Rich Binary Compound: CdTe₂

2009

View full text Add to dashboard Cite

Structural characterization by Raman spectroscopy of CdTe thin films electrodeposited in acidic conditions is considered in this work. This study focuses on the evolution of material properties as a function of the applied potential and the film thickness, demonstrating the possibility to obtain a new Te-rich compound with a II/VI ratio of 1/2 under specific bath conditions. Raman measurements carried out on etched samples first allow the elimination of the assumption of a mixture of phases CdTe + Te and tend to confirm the formation of the CdTe(2) binary compound. The signature of this phase on the Raman spectrum is the increase of the LO band intensity compared to that obtained for the CdTe. The influence of the laser power is also considered. While no effect is observed on CdTe films, the increase of the incident irradiation power leads to the decomposition of the CdTe(2) compound into two more stable phases namely CdTe and Te.

show abstract

“…In addition, a broad band at approximately 1.45 eV corresponding to defect related emissions is present . On the contrary, hexagonal CdTe is characterized by three BEH emissions blue-shifted at 1.5899, 1.6136, and 1.6345 eV. , …”

mentioning

confidence: 94%

“…For comparison, the spectra of both a heavily Bi doped CdTe crystal (Bi concentration of 8 × 10 18 at./cm 3 ) from an ingot grown using the Bridgman technique 20 and the whiskered film were measured and are shown in Figure . The photoluminescence spectrum of the Bi doped crystals (with cubic structure) has been extensively described previously. , A summary of the most important features is collected in Table , being dominated by acceptor-bound exciton (BEC) at 1.5896 eV and two DAP (donor−acceptor pair transitions) emissions at 1.5703 and 1.5532 eV 1 Summary of the Most Important Peaks in Spectra Shown in Figure energy position (eV)emissionCdTe:Bi crystal 21,22 whiskered film BEH 1 1.6136 BEH 2 1.6052 BEH 3 1.5899 BEC 1.5896 DAP 1 1.5712 1.5633 DAP 2 1.5535 1.5535 M 1.5362 1.5305 IBH 1.5001 …”

mentioning

confidence: 99%