物理化学学报 >> 2013, Vol. 29 >> Issue (12): 2624-2629.doi: 10.3866/PKU.WHXB201310301

光化学和辐射化学 上一篇    下一篇

基于稀土配合物的有机光盲型紫外探测器

李凌亮, 张福俊, 王梓轩, 安桥石, 王健, 徐征   

  1. 北京交通大学发光与光信息技术教育部重点实验室, 北京 100044
  • 收稿日期:2013-07-29 修回日期:2013-10-30 发布日期:2013-11-28
  • 通讯作者: 张福俊 E-mail:fjzhang@bjtu.edu.cn
  • 基金资助:

    高等学校基本科研业务基金(2013JBZ004), 北京市自然科学基金(2122050)及国家自然科学基金(613770029)资助项目

Organic Visible-Blind Ultraviolet Photodetectors Based on Rare Earth Complex

LI Ling-Liang, ZHANG Fu-Jun, WANG Zi-Xuan, AN Qiao-Shi, WANG Jian, XU Zheng   

  1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, Beijing Jiaotong University, Beijing 100044, P. R. China
  • Received:2013-07-29 Revised:2013-10-30 Published:2013-11-28
  • Contact: ZHANG Fu-Jun E-mail:fjzhang@bjtu.edu.cn
  • Supported by:

    The project was supported by the Fundamental Research Funds for the Central Universities, China (2013JBZ004), Beijing Natural Science Foundation, China (2122050), and National Natural Science Foundation of China (613770029).

摘要:

使用二苯甲酰甲烷-二苯菲罗啉-铕(Eu(DBM)3BPhen)作为电子给体和[6,6]-苯基-C61-丁酸酸甲酯([60]PCBM)作为电子受体制备了一种新型的有机光盲型紫外探测器. 在光强为2.1 mW·cm-2且波长为360 nm的紫外光照射下, 获得了26 mA·W-1的响应度和9.1%的外量子效率, 这是由于Eu(DBM)3BPhen 的强紫外光吸收能力和长达300 μs 的激子寿命使得给受体界面处具有较高的激子解离率. 在把[60]PCBM掺入Eu(DBM)3BPhen 后, 观察到了明显的光致发光猝灭和光电导现象. 由于材料较低的载流子迁移率和受陷激子的缓慢释放, 在紫外光照射关闭后, 观察到了较强的持续光电导现象.

关键词: 有机光盲, 紫外探测器, 持续光电导

Abstract:

Anew type of organic visible-blind ultraviolet (UV) photodetector based on tri(dibenzoylmethane)(4, 7-biphenyl-1,10-phenanthroline)europium (Ⅲ) [Eu(DBM)3BPhen] as an electron donor and [6,6]-phenyl-C-61-butyric acid methyl ester ([60]PCBM) as an electron acceptor was fabricated. A peak response of 26 mA·W-1 and external quantum efficiency of 9.1% were obtained under illumination with 360 nm UV light at 2.1 mW·cm-2. This was because of the high UV absorption of Eu(DBM)3BPhen and the long lifetime, 300 μs, of Eu3+ ions, resulting in high exciton dissociation efficiency. Distinct photoluminescence quenching and photoconductivity of Eu(DBM)3BPhen were obtained by doping with [60]PCBM. A strong persistent photoconductivity was observed, which could be attributed to low charge carrier transportation and slow release of trapped exciton states in the blend films after the UV light is turned off.

Key words: Organic visible-blind, Ultraviolet photodetector, Persistent photoconductivity

MSC2000: 

  • O644