Abstract
Iodine-methanol (I2 /ME), a chemical passivation method, is extensively used in silicon (Si) solar cell fabrication for measuring minority carrier lifetime in bulk regions. We demonstrate that quinhydrone-methanol (QHY/ME) provides higher lifetimes than I2 /ME. For 0.01 mol/ dm-3 QHY/ME on float-zone (FZ) wafers at 1× 1015 cm-3 injection level, a high lifetime of 3.3 ms and surface recombination velocity of 7 cm/sec on n-type (100 Ω cm) and 1.1 ms on p-type (2 Ω cm) is reported. The surface recombination velocity is also measured out of solution for several days. Chemical characterization results indicate increasing surface oxidation with decreasing passivation, consistent with proposed bonding mechanism.
Original language | English (US) |
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Article number | 063502 |
Journal | Applied Physics Letters |
Volume | 96 |
Issue number | 6 |
DOIs | |
State | Published - 2010 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)