一个高性能双功能有机上转换装置,探测能力接近10斯和光子对光子效率超过20斯
Zeyu He1, Heng-Yuan Zhang1, Xiaoyang Du1
1School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Ave, West Hi-Tech Zone, Chengdu 610054, P. R. China. xiaoyangdu@uestc.edu.cn.
Materials horizons
|October 26, 2023
概括
本研究介绍了一种高性能,纯有机的上转换装置 (UCD),用于近红外 (NIR) 检测. 新型UCD实现了创纪录的检测能力和效率,使先进的成像应用不需要重金属.
科学领域:
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
- 光子学 是一个光子学.
背景情况:
- 有机上转换装置 (UCD) 提供低成本,方便的近红外 (NIR) 检测和成像.
- 现有的UCD通常依赖于有毒,昂贵的重金属发射器,并且具有低检测能力 (D*) 和光子对光子转换效率 (ηp-p).
- 对三重激子 (T1) 的高效利用和改进的光学外仍然是UCD实际应用的挑战.
研究的目的:
- 开发一个高性能,双功能,纯有机的UCD.
- 克服重金属依赖和当前UCD低效率的局限性.
- 为了提高探测能力 (D*) 和光子对光子转换效率 (ηp-p),用于实际的NIR探测和成像.
主要方法:
- 通过双反向系统间交叉通道设计了一种纯有机的UCD,利用高效的三重激子 (T1) 利用.
- 包含一个具有高水平双极比率的发射单元,用于增强光学外.
- 在检测单元中实现了高检测度 (D*),超过10^14 Jones.
主要成果:
- 有机UCD在NIR地区实现了突出的D*接近10^13斯和20.1%的高ηp-p.
- 在低功率 (0.29μW cm^-2) 检测到850nm的光,显示的对比度高 (>70,000:1).
- 实现了快速响应时间 (8.9μs上升,14.8μs下降) 和在低功耗监测和生物成像中的成功应用.
结论:
- 开发的有机UCD消除了对重金属排放者的需求,提供了更安全,更具成本效益的替代方案.
- 该设备展示了创纪录的性能指标,显著提高了UCD在NIR检测和成像方面的潜力.
- 高性能可实现实际应用,包括先进的生物成像和实时监控.
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