Slow decay dynamics of visible photoluminescence from nanometer-size silicon crystallites

✍ Scribed by Yoshihiko Kanemitsu; Hiroshi Uto

• Book ID: 102620005
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 103 KB
• Volume: 15
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1994.1006

✦ Synopsis

We have studied the decay dynamics of visible photoluminescence (PL) from nanometer-sized (\mathrm{Si}) crystallites fabricated by electrochemical etching of single crystalline (\mathrm{Si}) and laser-breakdown of (\mathrm{SiH}_{4}) gas. In two types of (\mathrm{Si}) crystallites, the slow decay behavior of red PL is characterized by a stretched exponential function. The temperature dependence of the PL decay rate is similar to that of variable-range hopping of carriers in two-dimensional systems. It is concluded that the slow decay (\mathrm{PL}) is caused by the hopping-limited recombination in surface states of nanocrystallines.