کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
703234 | 1460814 | 2010 | 4 صفحه PDF | دانلود رایگان |
The optoelectronic properties of ultrananocrystalline diamond films (UNCD) grown using N2 = 0 and 5% in the deposition gas mixture, are investigated by transient photocurrent measurements under nanosecond light pulses, both in planar and sandwich contact arrangements.Independent of contact configuration and N2% value, very similar characteristic times in the 6-7 ns range are detected in the nanosecond range, reflecting a homogeneous distribution of states responsible for such decay times. On a longer time scale, nitrogen addition appears to slow down carrier transport promoting trapping and detrapping processes responsible for single and two power law photocurrent decays in films deposited using N2 = 5% for sandwich and planar contact arrangements, respectively. Such a result suggests a nitrogen induced transport anisotropy tentatively related to structural modifications occurring at relatively low N2%.
Journal: Diamond and Related Materials - Volume 19, Issues 2–3, February–March 2010, Pages 238–241