A study of the depth dependence of photoluminescence from thin film CdS/CdTe solar cells using bevel etched samples

Halliday, D.P.; Eggleston, J.M; Durose, K.

doi:10.1016/s0040-6090(97)00917-6

Cited by 37 publications

(19 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…QCM electrodes used in our study are made of AT-cut piezoelectric quartz crystal with oscillation frequencies between 7.995 and 7.950 MHz. The density (F) of the crystal is 2.684 g/cm 3 , and the shear modulus (μ) of quartz is 2.947 Â 10 11 g/cm s 2 . A change of 1 Hz in QCM resonance frequency corresponds to 1.34 ng of materials adsorbed onto the crystal surface of an area of 0.196 cm 2 .…”

Section: Methodsmentioning

confidence: 99%

Humidity Sensing Properties of CdS Nanoparticles Synthesized by Chemical Bath Deposition Method

Demir

Okur

Seker

et al. 2011

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Thin films of CdS nanoparticles were synthesized by the chemical bath deposition (CBD) technique to investigate humidity response characteristics. The morphology and the crystal structure of CdS thin films were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The quartz crystal microbalance (QCM) technique was used to measure the water vapor adsorption and desorption rates of CdS thin films. The dynamic Langmuir model was used to analyze the kinetics of the moisture adsorption and desorption process under relative humidity (RH) between 17 and 85% RH. Our results indicate that CdS thin films have a great affinity to humidity at room temperature.

show abstract

Section: Methodsmentioning

confidence: 99%

Humidity Sensing Properties of CdS Nanoparticles Synthesized by Chemical Bath Deposition Method

Demir

Okur

Seker

et al. 2011

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…6,[14][15][16] Several papers have reported on PL studies performed on CdTe/CdS layer stacks. [17][18][19][20][21] The evolution of PL peaks during device processing was correlated with the photovoltaic performance of devices. 19,20 In general, PL peaks originating from CdTe are observed in the range of 1.3-1.5 eV.…”

Section: As Well As By Indiffusion Of Te Originating Frommentioning

confidence: 99%

Photoluminescence study of polycrystalline photovoltaic CdS thin film layers grown by close-spaced sublimation and chemical bath deposition

Abken

Halliday

Durose

2009

Journal of Applied Physics

122

View full text Add to dashboard Cite

Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Photoluminescence ͑PL͒ measurements were used to study the effect of postdeposition treatments by annealing and CdCl 2 activation on polycrystalline CdS layer grown by close-spaced sublimation ͑CSS͒ and chemical bath deposition ͑CBD͒. CdS films were either annealed in a temperature range of 200-600°C or CdCl 2 treated between 300-550°C. The development of "red," "intermediate orange," "yellow," and "green" luminescence bands is discussed in comparison with PL assignments found in literature. PL spectra from CdS layer grown by CSS are dominated by the yellow band with transitions at 2.08 and 1.96 eV involving ͑Cd i -A͒, ͑V S -A͒ complex states where A represents an acceptor. Green luminescence bands are observed at 2.429 and 2.393 eV at higher annealing temperature of 500-600°C or CdCl 2 treatment above 450°C, and these peaks are associated with zero and a longitudinal optical phonon replica of "free-to-bound" transitions. As grown CBD-CdS films show a prominent red band with four main peaks located at 1.43, 1.54, 1.65, and 1.77 eV, believed to be phonon replicas coupled with local vibrational modes. This remains following postdeposition treatment. The red luminescence is associated with V S surface states and in the case of CdCl 2 treatment with ͑V Cd -Cl S ͒ centers. Postdeposition treatments of CBD and CdS promote the evolution of an intermediate orange band at 2.00 eV, most likely a donor-acceptor pair, and a yellow band at 2.12 eV correlated with ͑Cd i -V Cd ͒ centers. The green luminescence bands observed at 2.25 and 2.34 eV are associated with transitions from deep donor states ͑e.g., Cd i ͒ to the valence band. These states form due to crystallinity enhancement and lattice conversion during annealing or CdCl 2 activation. Observed changes in PL bands provide detailed information about changes in radiative recombination centers in CdS layer, which are suggested to occur during device processing of CdTe/CdS thin film solar cells.

show abstract

“…A number of means have been utilised to investigate the diffusion of sulphur from the CdS to the CdTe absorber in solar cells; these include secondary ion mass spectrometry (SIMS) [25,26], photoluminescence spectroscopy (PL) [27][28][29] and transmission electron microscopy (TEM) combined with energy dispersive spectrometry (EDS) [16,30]. Of these methods, SIMS has the highest sensitivity and can detect impurities at a parts per million (ppm) level but suffers from limited depth resolution when investigating the deep CdTe/CdS interface, normally 3-6 μm below the back surface of the sample.…”

Section: Introductionmentioning

confidence: 99%

“…The exchange of tellurium with sulphur in CdTe has been shown to reduce the band gap of the resulting alloy [31,32] and this effect can be observed both with PL and cathodoluminescence (CL). The principal limitation of PL is the spatial resolution; the size of the laser spot and its penetration depth into the sample both being on the micrometre-scale [27].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of microstructural stability and sulphur diffusion in CdS/CdTe photovoltaic devices

Taylor

Major

Kartopu³

et al. 2015

Solar Energy Materials and Solar Cells

View full text Add to dashboard Cite

A study of the depth dependence of photoluminescence from thin film CdS/CdTe solar cells using bevel etched samples

Cited by 37 publications

References 11 publications

Humidity Sensing Properties of CdS Nanoparticles Synthesized by Chemical Bath Deposition Method

Humidity Sensing Properties of CdS Nanoparticles Synthesized by Chemical Bath Deposition Method

Photoluminescence study of polycrystalline photovoltaic CdS thin film layers grown by close-spaced sublimation and chemical bath deposition

A comparative study of microstructural stability and sulphur diffusion in CdS/CdTe photovoltaic devices

Contact Info

Product

Resources

About