Characterisation of in-situ thermally evaporated   thin film solar cells with NiP back contacts

Duke, Stanley D.; Miles, Robert; Pande, P.C.; Spoor, Sandra; Ghosh, Bablu K.; Datta, P.K.; Carter, M. J.; Hill, R.

doi:10.1016/0022-0248(95)00770-9

Cited by 19 publications

(6 citation statements)

References 5 publications

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“…[5][6][7][8][9][10][11] Table I summarizes the main levels reported. The authors assumed that the CdS is highly doped so that the depletion region is mainly within the CdTe.…”

Section: Introductionmentioning

confidence: 99%

Deep level transient spectroscopy of CdS/CdTe thin film solar cells

Lourenço

Yew

Homewood

et al. 1997

Journal of Applied Physics

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Deep levels in polycrystalline n-CdS/p-CdTe photovoltaic structures have been studied by deep level transient spectroscopy ͑DLTS͒. The results were obtained from cells which have undergone different post-deposition treatment ͑as-deposited, heat treated, and heat treated in the presence of CdCl 2 ). The DLTS results showed a deep level distribution independent of the post-deposition treatment. For all samples the spectra were dominated by a hole trap, localized at E V ϩ0.48 eV. Metastable hole and electron traps were also observed, mainly in the heat treated ͑with and without a CdCl 2 layer͒ devices.

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“…[5][6][7][8][9][10][11] Table I summarizes the main levels reported. The authors assumed that the CdS is highly doped so that the depletion region is mainly within the CdTe.…”

Section: Introductionmentioning

confidence: 99%

Deep level transient spectroscopy of CdS/CdTe thin film solar cells

Lourenço

Yew

Homewood

et al. 1997

Journal of Applied Physics

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“…Optimum treatment decreased the trap densities over a non-treated sample. The decrease of trap densities in CdTe PV cells with CdCl 2 treatment over untreated samples has also been shown by Duke et al [11]. The use of the InGaAs photodiode to quantify the flux limits the energy range of the spectra.…”

Section: Resultsmentioning

confidence: 75%

“…Others have used steady state and transient photocapacitance (PHCAP) to characterize defect levels in CdTe [10,11]. Optical deep level transient spectroscopy (ODLTS) with sub-band gap light energy has been used by others [8,12] for other materials.…”

Section: Introductionmentioning

confidence: 99%

Photocapacitance study of deep levels in thin CdTe PV devices

et al. 2007

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“…However, CdS thin films created via CBD/sputtering tend to show large amounts of surface roughness that causes optical loss, and it is also difficult to fabricate thin films of greater than 300 nm thicknesses in the case of CBD (Nemec et al 2002). A CdS deposition technique less commonly used is thermal evaporation, where thin films of CdS in excess of 1 lm can be easily deposited without any significant surface roughness (Duke et al 1996). The increased thickness and reduced surface roughness of thin films fabricated by thermal evaporation enhance the extinction and transmission characteristics, respectively, of the resulting filter.…”

Section: Fluorescent Detectionmentioning

confidence: 98%

Valve controlled fluorescence detection system for remote sensing applications

James

Scullion

Ashok

et al. 2011

Microfluid Nanofluid

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We demonstrate a microfluidics-based fluorescence detection device where the filters, source, detector, and electronically controlled valves are embedded into a Polydimethylsiloxane (PDMS)-based microfluidic chip. The device reported here has been specifically designed for chlorophyll a fluorescence sensing in autonomous systems, such as oceanic applications. In contrast to a monolithic approach, the modular approach made the fabrication of this device simpler and cheaper. For fluorescence detection, an InGaN/GaN LED is used as the excitation source to specifically excite chlorophyll a; a metal-dielectric FabryPerot filter was used to extinguish out-of-band excitation. A simple Si photodiode is used as detector and provided with a thermally evaporated CdS emission filter to block the excitation source. This filter combination provides an excellent solution to the difficult problem of combining high-rejection excitation and emission filters in an integrated thin-film format. Furthermore, the metal-dielectric filter provides a much broader angular response than a comparable multilayer Bragg mirror, which is a key advantage in the integrated format. We use a novel paraffin wax-based valve design affords low power single-use actuation, between 0.5 and 1 J per actuation and withstands 0.6 bar differential pressure, which provides better performance than its previously reported counterparts. The remote valve-controlled operation of the fluorescence detection system is demonstrated, illustrating the measurement of a chlorophyll a solution, with a detection limit of 340 lM and subsequent valve-controlled flushing of the measurement reservoir.

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Characterisation of in-situ thermally evaporated thin film solar cells with NiP back contacts

Cited by 19 publications

References 5 publications

Deep level transient spectroscopy of CdS/CdTe thin film solar cells

Deep level transient spectroscopy of CdS/CdTe thin film solar cells

Photocapacitance study of deep levels in thin CdTe PV devices

Valve controlled fluorescence detection system for remote sensing applications

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