Abstract
This subcontract report entails investigation of engineering improvements in the performance and stability of solar cells in a systematic way. It consists of the following four tasks: Task 1-Materials research and device development; Task 2-Process improvement directed by real-time diagnostics; Task 3-Device loss mechanisms; and Task 4-Characterization strategies for advanced materials. Thereal-time spectroscopic ellipsometry (RTSE) multichamber is near completion, and trial depositions with a-Si:H will begin shortly. Construction of the new dual beam photoconductivity (DBP) apparatus has been completed, and the new capabilities are being used in studies on a-Si:H thin films. A new apparatus is being constructed for in-depth studies on the mechanisms limiting the performance ofa-Si:H solar cells and the two track studies (cells and films) of the Staebler-Wronski Effect. The capabilities include the ability to integrate the cell characteristics including the quantum efficiency, at different temperatures on both p-i-n and n-i-p solar cells.
Original language | American English |
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Number of pages | 78 |
State | Published - 2004 |
Bibliographical note
Work performed by Pennsylvania State University, University Park, PennsylvaniaNREL Publication Number
- NREL/SR-520-36695
Keywords
- crystalline
- current-voltage
- density
- devices
- differential diode quality factor
- dual-beam photoconductivity (DBP)
- light-induced
- photocurrent
- PV
- quasi-fermi splitting
- real-time spectroscopic ellipsometry (RTSE)
- solar cells
- thermal annealing