کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5424546 | 1395828 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Imaging of electronic structure of lead phthalocyanine films studied by combined use of PEEM and Micro-UPS
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کلمات کلیدی
Thin film growth - رشد نازک فیلمelectronic structure - ساختار الکترونیکیUltraviolet photoelectron spectroscopy (UPS) - طیف سنجی فوتوالکتریم اشعه ماوراء بنفش (UPS)Phthalocyanine - فتالوسیانینPhotoemission electron microscopy (PEEM) - میکروسکوپ الکترونی Photemission (PEEM)Organic semiconductor - نیمه رسانای آلیWork function - کارکرد کار
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Imaging of electronic structure of lead phthalocyanine films studied by combined use of PEEM and Micro-UPS Imaging of electronic structure of lead phthalocyanine films studied by combined use of PEEM and Micro-UPS](/preview/png/5424546.png)
چکیده انگلیسی
The thin film growth of lead phthalocyanine (PbPc) on graphite substrate has been studied by photoemission electron microscopy (PEEM) operated with tunable UV laser radiation. Origin of the contrast of PEEM images was elucidated by comparison with microspot ultraviolet photoemission spectroscopy (Micro-UPS). The photoelectron yield curves measured with PEEM for annealed films of different coverages were in agreement with the shifts of the vacuum levels determined by Micro-UPS. Below 1 monolayer (ML) coverage, PbPc molecules did not form islands/domains but were sparsely distributed and formed uniform films. Above 1 ML, PbPc molecules formed stable islands of bilayer in a well-ordered 1 ML film. On the other hand, for as-deposited films with thickness equivalent to annealed 0.3 ML coverage, PbPc molecules formed metastable bilayer islands of a few μm-size in the sparsely packed uniform film. These results demonstrate the capability of combined use of the complementary methods PEEM and Micro-UPS to resolve inhomogeneity of electronic structure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 602, Issue 13, 1 July 2008, Pages 2232-2237
Journal: Surface Science - Volume 602, Issue 13, 1 July 2008, Pages 2232-2237
نویسندگان
I. Yamamoto, N. Matsuura, M. Mikamori, R. Yamamoto, T. Yamada, K. Miyakubo, N. Ueno, T. Munakata,