کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7840233 | 1505864 | 2018 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature-dependent photoluminescence of CsPbX3 nanocrystal films
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Temperature-dependent photoluminescence of CsPbX3 nanocrystal films Temperature-dependent photoluminescence of CsPbX3 nanocrystal films](/preview/png/7840233.png)
چکیده انگلیسی
Temperature-dependent photoluminescence (PL) properties of all-inorganic perovskite CsPbX3 (X=Cl, Br, I, or their mixtures) nanocrystal (NC) films are studied by use of steady-state and time-resolved PL spectroscopies. It is confirmed that the PL intensity of the NC films decreases rapidly with increasing temperature below 300â¯K and is nearly invariant till 370â¯K due to thermal quenching and degradation, respectively. With increasing temperature, photo energies of linewidth and emission peak become larger due to stronger exciton-phonon coupling. It is found that temperature-dependent PL is composed of a band-edge excitonic state and trapping state emission and produces the observation of biexponential kinetics. The short-lived emission is due to band-edge exciton recombination, while the component with long-lived lifetime is ascribed to trapping state, which arises from recombination in NC that has a photoinduced trapped pathway and a temporally resolved peak shift. Besides organic-inorganic perovskite hybrid NCs, trapping state also exists in all-inorganic CsPbX3 NCs, even though PL spectrum has high PL quantum yield and narrow emission linewidths.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 198, June 2018, Pages 350-356
Journal: Journal of Luminescence - Volume 198, June 2018, Pages 350-356
نویسندگان
Qiuju Han, Wenzhi Wu, Weilong Liu, Qingxin Yang, Yanqiang Yang,