| CH3NH3PbI3薄膜的光致发光增强效应 |
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| 引用本文： | 党伟,刘旭,白晶晶,赵晋津,张连水.CH3NH3PbI3薄膜的光致发光增强效应[J].河北大学学报(自然科学版),2016,36(5):462. |
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| 作者姓名： | 党伟 刘旭 白晶晶 赵晋津 张连水 |
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| 基金项目： | 国家自然科学基金资助项目(21503066);高等学校科学技术研究项目(ZC2016003);保定市科学技术研究与发展指导计划项目(15ZG029);河北大学博士后项目(137161);河北大学引进人才项目(2014-283) |
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| 摘 要： | 采用光谱测量技术分析了CH3NH3PbI3薄膜的光致发光增强效应及其对载流子复合动力学的影响.实验结果表明,增加光浴功率密度有助于提高薄膜的光致发光增强速率,O2环境有利于薄膜的光致发光增强.CH3NH3PbI3薄膜光浴处理引入的光致发光增强效应源于薄膜内缺陷态浓度降低.同时利用微波吸收介电谱技术,表征了CH3NH3PbI3薄膜光浴前后,自由载流子和浅能级束缚载流子的复合动力学.发现光浴后,薄膜的自由载流子和浅能级束缚载流子浓度明显提高.
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| 关 键 词： | CH3NH3PbI3 光致发光增强 缺陷 载流子复合动力学 |
| 收稿时间： | 2016-04-10 |
Photoluminescence enhancement effect of CH3NH3PbI3 film |
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| DANG Wei,LIU Xu,BAI Jingjing,ZHAO Jinjin,ZHANG Lianshui.Photoluminescence enhancement effect of CH3NH3PbI3 film[J].Journal of Hebei University (Natural Science Edition),2016,36(5):462. |
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| Authors: | DANG Wei LIU Xu BAI Jingjing ZHAO Jinjin ZHANG Lianshui |
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| Affiliation: | 1.Key Laboratory of Hebei Province Optic-electronic Information Materials, College of PhysicsScience and Technology, Hebei University, Baoding 071002, China; 2.College of Materials Science andEngineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China |
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| Abstract: | The photoluminescence enhancement of CH3NH3PbI3 film and its effect on carrier recombination dynamics were studied by using photoluminescence spectroscopy.Experimental results demonstrate that the rate of photoluminescence enhancement is higher when the power density of light soaking increases.And oxygen atmosphere is helpful to photoluminescence enhancement of CH3NH3PbI3 film.The reduction of defect density in the film is the main mechanism responsible for the photoluminescence enhancement.Furthermore,the effect of light soaking on the recombination dynamics of free carriers and shallow trapped carriers was analyzed by microwave absorption dielectric spectroscopy. Densities of free carriers and shallow trapped carriers in CH3NH3PbI3 film show an obvious increase after the light soaking. |
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| Keywords: | CH3NH3PbI3 photoluminescence enhancement defect carrier recombination dynamics |
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