A Simplified Approach to Solar Cell Modeling

Crandall, Richard S.; Kalina, Jeffrey; Delahoy, A. E.

doi:10.1557/proc-118-593

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…It increases with increasing intensity but unlike the V oc , the V mpp saturates at illumination intensities close to AM1.5. This observation is consistent with known reduction of fill factor in thin-film silicon solar cells at illumination intensities above one sun due to the screening of the built-in field in absorber layer at high densities of the excess charge carriers [43]. The V oc and V mpp values of the triple B over a wide range of illumination intensity matches the redox voltage of the battery hence a robust solution for practical application.…”

Section: Integrated Solar Cell and Battery Measurement Set Upsupporting

confidence: 85%

Photoelectrochemical application of thin‐film silicon triple‐junction solar cell in batteries

Agbo

Merdzhanova

et al. 2016

Physica Status Solidi (a)

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Solar cell in combination with a secondary battery is a straightforward power supply solution for portable electronics. When used indoors or outdoors under sufficient illumination conditions the combination is attractive to realize selfsustained devices or extend off-grid operation time. However, only little fraction of widely spread portable devices worldwide are equipped with PV energy harvesters. Besides low-average power, combination of discrete PV module and battery is bulky for extreme demands in modern portable electronics. Integration of thin-film solar cell with a thin-film storage cell in a monolithic, customizable module is a viable option. The low level cell-to-cell integration is possible with thin-film silicon multi-junction solar cells providing sufficient voltage to charge Li-ion storage cell. In this work, we focus on the development of triple-junction thin-film silicon solar cells for monolithic integration with lithium ion storage cells. We show that with appropriate voltage matching a triple junction thin-film silicon solar cell provides efficient charging for labscale Li-ion storage cell under a range of illumination intensities. Maximum solar energy-to-battery charging efficiency of 8.8% was obtained.

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Section: Integrated Solar Cell and Battery Measurement Set Upsupporting

confidence: 85%

Photoelectrochemical application of thin‐film silicon triple‐junction solar cell in batteries

Agbo

Merdzhanova

et al. 2016

Physica Status Solidi (a)

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“…Experimentally, it does not appear that photogenerated space charge can produce significant field distortion in the usual a-Si:H p-i-n cell at room temperature [135]. However, at low temperature or for thick cel_, a photogenerated space charge will distort the electric field and the simple uniform field model cannot be used.…”

Section: T-3675mentioning

confidence: 99%

“…In fact, if space charge due to the photogenerated carriers can be neglected, then the hole will not limit the current because electrons and holes each make equal contributions to the current [135]. A carrier's contribution is, at low fields, equal to I_/L because the carrier drifts a distance equal to its drift length before belng trapped.…”

Section: T-3675mentioning

confidence: 99%

Annual Report: Solid State Photovoltaic Research Branch, FY 1989

Author¹

1990

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This reportwas preparedas an accountof work sponsoredby an agencyof the UnitedStates government.Neitherthe,UnitedStates governmentnor any agencythereof, nor any of their employees, makes any warranty,express or implied, or assumes any legal liabilityor responsibilityfor the accuracy, completeness, or usefulnessof any information,apparatus,product,or processdisclosed,or represents that its use would not infringeprivately owned rights. Reference hereinto any specificcommercialproduct,process,or serviceby tradename, trademark, manufacturPr, or otherwisedoes notnecessar=ly constitute or implyitsendorsement,recommendation, or favoringbythe UnitedStatesgovernmentor any agencythereof.Thevie .s and opinionsof authors expressedherein do not necessarilystate or reflectthose of the United Statesgovernmentor any agencythereof.

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“…Crandall, et al [2], modeled the performance of aSi:H cells operating near l-sun intensity in terms of voltage-dependent collection caused by field collapse due to higher carrier densities or lower operating temperatures. The model predicts a softening of the l-V curve as he observed, but applying it to our observations of reduced AC photocurrents at small spot size (high intensities) remains a problem.…”

Section: Discussionmentioning

confidence: 99%

“…Crandall, et al [2], developed a model for voltage-dependent collection in a-Si:H solar cells resulting from a collapse of the space-charge region with increasing carrier generation (up to 2 suns) and enhanced with lower operating temperatures. The model appears to fit the deterioration of the AC FF adequately when intensities are on the order of 1 sun, but the applicability of the model begins to fail in cases when I-V is diminished with small spot sizes (high intensities), even under reverse bias conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of light intensity on current collection in thin-film solar cells

McMahon

Roedern²

Conference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference - 1997

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We have measured the current-voltage curves of thin-film solar cells using focused laser spots (30 -500 pm) using DC and modulated (AC) photocurrent techniques.The AC short-circuit current response (Isc ) and the AC fill factors (FF) decrease for small spot sizes corresponding to several 100 sun light intensities. Laser line scans across the devices produced significant but reproducible spatial fluctuations in AC lsc.

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A Simplified Approach to Solar Cell Modeling

Cited by 5 publications

References 4 publications

Photoelectrochemical application of thin‐film silicon triple‐junction solar cell in batteries

Photoelectrochemical application of thin‐film silicon triple‐junction solar cell in batteries

Annual Report: Solid State Photovoltaic Research Branch, FY 1989

Effect of light intensity on current collection in thin-film solar cells

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