High‐resolution lifetime mapping using modulated free‐carrier absorption
作者:
Stefan W. Glunz,
Wilhelm Warta,
期刊:
Journal of Applied Physics
(AIP Available online 1995)
卷期:
Volume 77,
issue 7
页码: 3243-3247
ISSN:0021-8979
年代: 1995
DOI:10.1063/1.358677
出版商: AIP
数据来源: AIP
摘要:
Modulated free‐carrier absorption (MFCA) is introduced as a novel contactless lifetime mapping technique with high spatial resolution. The advantages of MFCA mapping as compared to other methods are discussed. Examples of lifetime maps on multicrystalline silicon are presented. Solar cells fabricated from identical wafers have been investigated using light beam induced current mapping. Excellent agreement between structures obtained in the measured lifetime and in the current maps was observed. In addition, a quantitative comparison with diffusion lengths determined by local internal quantum efficiency evaluations is presented. ©1995 American Institute of Physics.
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