2017 IEEE 44th Photovoltaic Specialist Conference (PVSC) 2017
DOI: 10.1109/pvsc.2017.8366482
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Effects of CdCl2 treatment on the local electronic properties of polycrystalline CdTe measured with photoemission electron microscopy

Abstract: To investigate the effects of CdCl 2 treatment on the local electronic properties of polycrystalline CdTe films, we conducted a photoemission electron microscopy (PEEM) study of polished surfaces of CdTe films in superstrate configuration, with and without CdCl 2 treatment. From photoemission intensity images, we observed the tendency for individual exposed grain interiors to vary in photoemission intensity, regardless of whether or not films received CdCl 2 treatment. Additionally, grain boundaries develop co… Show more

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Cited by 2 publications
(4 citation statements)
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“…X-ray photoelectron spectroscopy showed less than 1 atom % oxygen and 17 atom % carbon after sputtering . After sputter-cleaning, the samples were transferred in N 2 (<0.1 ppm O 2 , <0.1 ppm H 2 O) to the UHV PEEM measurement chamber, without additional exposure to air.…”
Section: Results and Discussionsupporting
confidence: 82%
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“…X-ray photoelectron spectroscopy showed less than 1 atom % oxygen and 17 atom % carbon after sputtering . After sputter-cleaning, the samples were transferred in N 2 (<0.1 ppm O 2 , <0.1 ppm H 2 O) to the UHV PEEM measurement chamber, without additional exposure to air.…”
Section: Results and Discussionsupporting
confidence: 82%
“…17 X-ray photoelectron spectroscopy showed less than 1 at% oxygen and 17 at% carbon after sputtering. 18 After sputter-cleaning, samples were transferred in N2 (<0.1 ppm O2, <0.1 ppm H2O) to the UHV PEEM measurement chamber, without additional exposure to air. After initial PEEM measurement, samples were exposed to air for 30 minutes, reintroduced into UHV, and examined to investigate the impact of air exposure.…”
mentioning
confidence: 99%
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“…Presumably, fewer grain boundaries lead to reduced scattering and recombination of photogenerated carriers and the prevailing description is that Cl from the CdCl 2 treatment segregates to grain boundaries, depleting or even inverting them with respect to grain interiors. Junctions between grain interiors and grain boundaries are expected to repel holes and conduct electrons to the back contact more efficiently [43]. Overall morphology results in this work imply that the films are uniform, smooth, homogeneous, and nearly dense-packed as well as free from voids, cracks, or pinholes.…”
Section: Surface Morphology By Fesemmentioning
confidence: 71%