Research on stable, high-efficiency, large-area, amorphous-silicon-based submodules, task B: Semiannual subcontract report, 1 September 1988--28 February 1989
The primary objective of the research described in this report is to develop processes for fabricating stable, high-efficiency, single-junction and tandem cells and submodules based on thin-film silicon:hydrogen alloys (TFS). The focus is on developing a four-terminal hybrid tandem junction consisting of a copper indium diselenide (CIS) bottom circuit and a semitransparent TFS top circuit. A principal objective is to explore area-related processing problems that affect junction and large-area module performance. Tandem cell samples developed in this work were measured at 14.6% efficiency in the laboratory, and single-junction CIS cells at 14.1% efficiency. Film deposition and patterning processes were successfully extended to 0.4-m/sup 2/ substrates. Submodule performance (3900 cm/sup 2/) is approaching that demonstrated earlier on smaller submodules (940 cm/sup 2/), which confirms the scalability of thin-film PV processing. Environmentally durable packaging techniques were developed for single-junction and tandem modules. TFS module stability is limited by Staebler-Wronski effects, while CIS module stability is encouraging. 15 refs., 32 figs., 9 tabs.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA); ARCO Solar, Inc., Camarillo, CA (USA)
- DOE Contract Number:
- AC02-83CH10093
- OSTI ID:
- 6017759
- Report Number(s):
- SERI/STR-211-3512; ON: DE89009430
- Country of Publication:
- United States
- Language:
- English
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