氧化石墨烯的变温发光

doi:10.11901/1005.3093.2021.469

材料研究学报

2022, Vol. 36

Issue (8): 597-601 DOI: 10.11901/1005.3093.2021.469

研究论文

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氧化石墨烯的变温发光

李福禄¹, 韩春淼¹, 高嘉望¹, 蒋健¹, 许卉², 李冰¹(

)

^1.长春师范大学物理学院长春 130032
^2.吉林大学第一医院眼科长春 130021

Temperature Dependent Luminescence Properties of Graphene Oxide

LI Fulu¹, HAN Chunmiao¹, GAO Jiawang¹, JIANG Jian¹, XU Hui², LI Bing¹(

)

^1.College of Physics, Changchun Normal University, Changchun 130032, China
^2.Department of Ophthalmology, the First Hospital of Jilin University, Changchun 130021, China

引用本文:

李福禄, 韩春淼, 高嘉望, 蒋健, 许卉, 李冰. 氧化石墨烯的变温发光[J]. 材料研究学报, 2022, 36(8): 597-601.
Fulu LI, Chunmiao HAN, Jiawang GAO, Jian JIANG, Hui XU, Bing LI. Temperature Dependent Luminescence Properties of Graphene Oxide[J]. Chinese Journal of Materials Research, 2022, 36(8): 597-601.

全文: PDF(973 KB) HTML

摘要:

根据光致发光光谱和吸收光谱研究了氧化石墨烯(GO)的发光性能。结果表明,GO的发光源于片层内的sp²C团簇。sp²C团簇被高势垒的氧化官能团(sp³C)包围,形成了多量子阱结构。GO内有不同尺寸的sp²C团簇,其带隙与尺寸相关,尺寸越小带隙越宽,使发光覆盖范围较宽并依赖激发波长。还改变激发波长和温度,根据发光光谱研究了GO中不同局域态的发光行为。结果表明,514 nm激发的sp²C团簇的热激活能比830 nm激发的高56 MeV。温度对较小尺寸sp²C团簇的影响较小,因为尺寸越小限域效应越强,使电子空穴对的辐射跃迁几率提高。

关键词 ：无机非金属材料, 低维碳材料, 氧化石墨烯, 发光光谱

Abstract：

The luminescence properties of GO were investigated by means of photoluminescence spectra and absorption spectra. It follows that the luminescence of GO originates from sp²C clusters in lamellar. Sp²C clusters are surrounded by high barrier oxidation functional groups (sp³C), forming a multi-quantum well structure. There are sp²C clusters of different sizes in GO, and the band gap is related to the size. The smaller the size, the wider the band gap, so that the luminous coverage is wider and depends on the excitation wavelength. The emission behavior of different local states in GO was investigated by changing the excitation wavelength and temperature. The results show that the thermal activation energy of sp²C clusters excited by 514 nm was 56 MeV higher than that excited by 830 nm. Temperature has little effect on smaller sp²C clusters, because the smaller the size, the stronger the confinement effect and the radiative transition probability of electron hole pair is increased.

Key words： inorganic non-metallic materials low dimensional carbon materials graphene oxide luminescence spectrum

收稿日期: 2021-08-17

ZTFLH:

O613.7

基金资助:国家自然科学基金(11404036);吉林省科技厅自然科学基金(20210101164JC);吉林省教育厅科学技术研究项目(JJKH20220824KJ);长春师范大学自然科学基金(2020-010)

作者简介: 李福禄,男,1996年生,硕士

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.469 或 https://www.cjmr.org/CN/Y2022/V36/I8/597

图1 GO的紫外-可见吸收光谱和GO吸收光谱的Tauc拟合图

图2 GO在488 nm,514 nm和830 nm激发波长下的发光光谱和GO 发射峰的中心波长(左)和半峰宽（右）与激发光波长的关

图3 非晶碳的能带结构

图4 两种不同激发条件下GO相对发光强度的温度依赖性：(a) Eex =514 nm; (b) Eex =830 nm

图5 光致发光强度与1/KBT之间的关系

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