کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1442234 | 1509433 | 2011 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of hyperfine interactions on exciton formation in organic semiconductors
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of hyperfine interactions on exciton formation in organic semiconductors Effect of hyperfine interactions on exciton formation in organic semiconductors](/preview/png/1442234.png)
چکیده انگلیسی
It is still an open question whether the statistical ratio of 1:3 for the formation of singlet vs. triplet excitons in organic semiconductors can be violated. In this work, we use a two-site and a multi-site model to investigate this problem. We show that spin mixing by hyperfine fields leads to a violation of the statistical ratio if singlet and triplet excitons are formed with a different rate. This only occurs if the exciton formation rate is slow enough compared to the hyperfine precession frequency. The violation of the statistical ratio can be suppressed by applying an external magnetic field. In the multi-site model we demonstrate how disorder and Coulomb interactions affect the fraction of singlet excitons formed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 161, Issues 7–8, April 2011, Pages 613–616
Journal: Synthetic Metals - Volume 161, Issues 7–8, April 2011, Pages 613–616
نویسندگان
S.P. Kersten, A.J. Schellekens, B. Koopmans, P.A. Bobbert,