Thin film II–VI photovoltaics

Chu, T. L.; Chu, Shirley S.

doi:10.1016/0038-1101(94)00203-r

Cited by 193 publications

(94 citation statements)

References 68 publications

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“…The straight line segments were extrapolated from the straight line to A 2 = 0 in order to estimate the energy bandgaps of the CdTe layers tabulated in Table 2 for comparison. As observed in Table 2, the bandgap of both the as-deposited and the CdCl 2 treated CdTe layers within the explored cathodic voltage range falls within 1.45 ± 0.01 eV range which is comparable with the bandgap of bulk CdTe [19]. As shown in Fig.…”

Section: Optical Absorption Studysupporting

confidence: 74%

Analysis of electrodeposited CdTe thin films grown using cadmium chloride precursor for applications in solar cells

Ojo

Dharmadasa

2017

J Mater Sci: Mater Electron

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Section: Optical Absorption Studysupporting

confidence: 74%

Analysis of electrodeposited CdTe thin films grown using cadmium chloride precursor for applications in solar cells

Ojo

Dharmadasa

2017

J Mater Sci: Mater Electron

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“…Figure 11a,b show the absorbance curve and the Tauc plot for electrodeposited CdTe layer. Thick layers, greater than ~1.5 µm, show E g of 1.48 eV, very close to the E g of bulk materials [18]. Thin layers usually exhibit slightly higher E g values due to incomplete surface coverage and quantum effects.…”

Section: Optical Absorption (Uv-vis)mentioning

confidence: 65%

Fabrication of CdS/CdTe-Based Thin Film Solar Cells Using an Electrochemical Technique

et al. 2014

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Thin film solar cells based on cadmium telluride (CdTe) are complex devices which have great potential for achieving high conversion efficiencies. Lack of understanding in materials issues and device physics slows down the rapid progress of these devices. This paper combines relevant results from the literature with new results from a research programme based on electro-plated CdS and CdTe. A wide range of analytical techniques was used to investigate the materials and device structures. It has been experimentally found that n-, i-and p-type CdTe can be grown easily by electroplating. These material layers consist of nano-and micro-rod type or columnar type grains, growing normal to the substrate. Stoichiometric materials exhibit the highest crystallinity and resistivity, and layers grown closer to these conditions show n → p or OPEN ACCESSCoatings 2014, 4 381 p → n conversion upon heat treatment. The general trend of CdCl 2 treatment is to gradually change the CdTe material's n-type electrical property towards i-type or p-type conduction. This work also identifies a rapid structural transition of CdTe layer at 385 ± 5 °C and a slow structural transition at higher temperatures when annealed or grown at high temperature. The second transition occurs after 430 °C and requires more work to understand this gradual transition. This work also identifies the existence of two different solar cell configurations for CdS/CdTe which creates a complex situation. Finally, the paper presents the way forward with next generation CdTe-based solar cells utilising low-cost materials in their columnar nature in graded bandgap structures. These devices could absorb UV, visible and IR radiation from the solar spectrum and combine impact ionisation and impurity photovoltaic (PV) effect as well as making use of IR photons from the surroundings when fully optimised.

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“…eV [28], even for the as-deposited layer without any PGT to modify its optical parameters. Although, there were no clear differences in the bandgap due to the material quality of the as-deposited CdTe layer, the difference in the absorption edge is clearly observed in Figure 2 (b).…”

Section: Analysis Of Cds Layermentioning

confidence: 99%

Effect of the inclusion of galium in normal cadmium chloride treatment on electrical properties OF CdS/CdTe solar cell

Ojo

Olusola

Dharmadasa

2017

Materials Chemistry and Physics

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Thin film II–VI photovoltaics

Cited by 193 publications

References 68 publications

Analysis of electrodeposited CdTe thin films grown using cadmium chloride precursor for applications in solar cells

Analysis of electrodeposited CdTe thin films grown using cadmium chloride precursor for applications in solar cells

Fabrication of CdS/CdTe-Based Thin Film Solar Cells Using an Electrochemical Technique

Effect of the inclusion of galium in normal cadmium chloride treatment on electrical properties OF CdS/CdTe solar cell

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