High-efficiency CdS/CdTe solar cells on commercial SnO&lt;inf&gt;2&lt;/inf&gt;:F coated soda-lime glass substrates

Paudel, Naba R.; Yan, Yanfa

doi:10.1109/pvsc-vol2.2013.7179248

Cited by 2 publications

(4 citation statements)

References 21 publications

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“…The CdS:O layers were deposited by reactive sputtering of a CdS target in a 5% oxygen mixed Ar balance environment [16]. The optimized thickness for the biwindow layer was found to be CdS:O ∼10-15 nm and CdSe ∼ 100 nm.…”

Section: Effect Of Combined Cds:o/cdse Window Layermentioning

confidence: 99%

Current Enhancement of CdTe-Based Solar Cells

Paudel

Poplawsky

Moore

et al. 2015

IEEE J. Photovoltaics

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We report on the realization of CdTe solar cell photocurrent enhancement using an n-type CdSe heterojunction partner sputtered on commercial SnO 2 /SnO 2 :F coated soda-lime glass substrates. With high-temperature close-space sublimation CdTe deposition followed by CdCl 2 activation, this thin-film stack allows for substantial interdiffusion at the CdSe/CdTe interface facilitating a CdSe x Te 1 −x alloy formation. The bowing effect causes a reduced optical bandgap of the alloyed absorber layer and, therefore, leads to current enhancement in the long-wavelength region and a decrease in open-circuit voltage (V O C ). To overcome the V O C loss and maintain a high short-circuit current (J S C ), the CdTe cell configuration has been modified using combined CdS:O/CdSe window layers. The new device structure has demonstrated enhanced collection from both short-and long-wavelength regions as well as a V O C improvement. With an optimized synthesis process, a small-area cell using CdS:O/CdSe window layer showed an efficiency of 15.2% with a V O C of 831 mV, a J S C of 26.3 mA/cm 2 , and a fill factor of 69.5%, measured under an AM1.5 illumination without antireflection coating. The results provide new directions for further improvement of CdTe-based solar cells.

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Section: Effect Of Combined Cds:o/cdse Window Layermentioning

confidence: 99%

Current Enhancement of CdTe-Based Solar Cells

Paudel

Poplawsky

Moore

et al. 2015

IEEE J. Photovoltaics

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“…CdTe absorber layers with a thickness of about 4-5 μm were deposited by high temperature CSS method. More details of CdS and CdTe deposition have been reported elsewhere [16][17][18][19]. After the CdS and CdTe deposition, the thin-film samples received 'wet' chloride activation at 390°C for 30 min in a dry air ambient.…”

Section: Methodsmentioning

confidence: 99%

“…Our recent results [16,17] have shown that for CSS grown CdTe cells, the use of sputtered CdS window layers offers better control on the CdS/CdTe interfacial interdiffusion than the use of CBD grown CdS window layers. Optimizing this interdiffusion is critical for achieving high V OC and J SC [16].…”

Section: High Efficiency Cdte Cells With Cu-free Moo 3-x /Au Back Conmentioning

confidence: 98%

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CdS/CdTe thin‐film solar cells with Cu‐free transition metal oxide/Au back contacts

Paudel

Xiao

Yan

2013

Progress in Photovoltaics

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Superstrate CdS/CdTe thin‐film solar cells with Cu‐free transition metal oxide (TMO)/Au and Au‐only back contacts have been fabricated. The TMOs include MoO3‐x, V2O5‐x, and WO3‐x. The incorporation of the TMO buffer layers at the back contacts resulted in significant improvement on open‐circuit voltage (VOC) as compared with the cells with Cu‐free Au‐only back contacts. Among the cells using TMO buffer layers, the ones with MoO3‐x buffer layers exhibited the best performance, yielding an efficiency of 14.1% under AM1.5 illumination with VOC of 815 mV and a fill factor of 67.9%. Though the performance is slightly behind the best reference cell with a Cu/Au back contact fabricated in our lab with VOC of 844 mV, fill factor of 76.3%, and efficiency of 15.7%, the use of Cu‐free back contacts may lead to improved long‐term cell stability. Copyright © 2013 John Wiley & Sons, Ltd.

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High-efficiency CdS/CdTe solar cells on commercial SnO<inf>2</inf>:F coated soda-lime glass substrates

Cited by 2 publications

References 21 publications

Current Enhancement of CdTe-Based Solar Cells

Current Enhancement of CdTe-Based Solar Cells

CdS/CdTe thin‐film solar cells with Cu‐free transition metal oxide/Au back contacts

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