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Flexible solar cells in milliseconds: Pulse Thermal Processing of CdTe devices

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16 Author(s)
Murray, S.L. ; Oak Ridge Nat. Lab., Oak Ridge, TN, USA ; Klein, A.R. ; Murray, C.S. ; Schroder, K.A.
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Materials for a CdTe solar cell (ITO/CdS/CdTe/Cu/Pt) were sputtered at room temperature onto kapton, then transformed from resistive layers into a working solar cell by Pulse Thermal Processing (PTP), a novel radiant heat treatment developed at Oak Ridge National Laboratory (ORNL). Unlike conventional device fabrication approaches, the solar cell was a complete device, front-to-back contact, prior to heat treatment. In this proof-of-concept approach, the I-V curves for the as-deposited sputtered materials demonstrate little measurable photovoltaic (PV) activity, but achieved a Voc of 634 mV after PTP. Based on process simulations, it's estimated that the material/device transformation occurred in under 30 ms, while maintaining the kapton substate at temperatures below 250 °C.

Published in:

Photovoltaic Specialists Conference (PVSC), 2011 37th IEEE

Date of Conference:

19-24 June 2011