کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400276 | 1505911 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Room temperature enhanced blue-green, yellow-orange and red phosphorescence from some compounds of the type (CH3NH3)nâ1(1-naphthylmethyl ammonium)2Pbn(ClxBr1âx)3n+1 (with n=1, 2 and 0â¤xâ¤1) and related observations from similar compounds
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Room temperature enhanced blue-green, yellow-orange and red phosphorescence from some compounds of the type (CH3NH3)nâ1(1-naphthylmethyl ammonium)2Pbn(ClxBr1âx)3n+1 (with n=1, 2 and 0â¤xâ¤1) and related observations from similar compounds Room temperature enhanced blue-green, yellow-orange and red phosphorescence from some compounds of the type (CH3NH3)nâ1(1-naphthylmethyl ammonium)2Pbn(ClxBr1âx)3n+1 (with n=1, 2 and 0â¤xâ¤1) and related observations from similar compounds](/preview/png/5400276.png)
چکیده انگلیسی
The photoluminescence spectra of particulate organic-inorganic hybrid compounds, such as (CH3NH3)(C10H7CH2NH3)2Pb2Cl7, (CH3NH3)(C10H7CH2NH3)2Pb2(Cl0.65Br0.35)7 or (C10H7CH2NH3)2PbBr4 and (C10H7CH2NH3)2PbBr4-water, observed with 350Â nm excitation, exhibit a blue-green, a yellow-orange and a red phosphorescence band, respectively. The observation of enhanced light emission with a naked eye, even at room temperature, is attributed to the energy transfer from Wannier excitonic levels of inorganic to several states of the organic moiety, namely to the energy levels close to those of dimers, trimers, and tetramers of chromophore moieties. The experimental results are in qualitative agreement with those obtained theoretically by others, applying ab initio calculations. The results were compared with those obtained from 2-naphthylmethyl, 4-phenylbenzyl and 9-pyrenylmethyl analogues.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 149, May 2014, Pages 287-291
Journal: Journal of Luminescence - Volume 149, May 2014, Pages 287-291
نویسندگان
George C. Papavassiliou, George A. Mousdis, Georgia Pagona, Nikolaos Karousis, Maria-Sofia Vidali,