Title :
Minority-carrier lifetime of polycrystalline CdTe in CdS/CdTe solar cells
Author :
Ahrenkiel, R.K. ; Keyes, B.M. ; Wang, L. ; Albright, S.P.
Author_Institution :
Nat. Renewable Energy Lab., Golden, CO, USA
Abstract :
CdS/CdTe solar cells have been produced by low-cost spray technology. The NREL-measured efficiency of the best device is 12.7% at air mass 1.5. The first time, the minority-carrier lifetime of the polycrystalline CdTe grains was measured by time-resolved photoluminescence. The longest measured lifetimes were over 5 ns, and were found in large-grain (~4 μm), high-density material near the CdS/CdTe interface
Keywords :
II-VI semiconductors; cadmium compounds; carrier lifetime; minority carriers; solar cells; CdS-CdTe solar cells; NREL-measured efficiency; low-cost spray technology; minority-carrier lifetime; polycrystalline grains; time-resolved photoluminescence; Costs; Crystalline materials; Crystallization; Glass; Optical materials; Photoluminescence; Photonics; Photovoltaic cells; Semiconductor materials; Spraying;
Conference_Titel :
Photovoltaic Specialists Conference, 1991., Conference Record of the Twenty Second IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
0-87942-636-5
DOI :
10.1109/PVSC.1991.169347
