在有机光探测器中使用聚合物与单片开基态基态聚合物的增强收益
Qianxi Dang1, Lanzhen Hu2, Likai Yuan2
1School of Materials Science and Engineering, Harbin Institute of Technology, Shen Zhen, 518055, China.
Angewandte Chemie (International ed. in English)
|October 16, 2023
概括
研究人员使用一种新型聚合物开发出了一种新的有机光电探测器. 该设备实现了高增益和低噪声,用于敏感的弱光信号检测,性能优于现有技术.
科学领域:
- 光电学是指光电子产品.
- 材料科学 材料科学 材料科学
- 有机电子 有机电子
背景情况:
- 光探测器对于检测弱光信号至关重要,特别是在智能光电子系统中.
- 在光倍增类型有机光探测器中同时实现高增益和低噪声仍然是一个重大挑战.
- 现有的有机光电探测器很难平衡高性能指标.
研究的目的:
- 引入一种新型的合聚合物,PDN,具有单片开基态,以提高光检测器性能.
- 调查PDN在改善电子捕获和整体设备效率方面的潜力.
- 解决当前有机光电探测器在实现高增益和低噪声方面的局限性.
主要方法:
- 一种新的联聚合物PDN的合成和表征,该聚合物具有单片开基态.
- 制造三元有机光电探测器,将PDN聚合物纳入活性层.
- 基于PDN的光电探测器的性能评估,包括光电增益,暗电流密度,外部量子效率 (EQE) 和特定检测能力.
- 基于PDN的设备与对照组进行比较,以量化性能增强.
主要成果:
- 基于PDN的光电探测器在低向前偏差下显著增强光电增益和减少暗电流密度.
- 三元光电探测器在710nm和1.5V时实现了2552.3%的异常外部量子效率 (EQE).
- 具体检测能力达到了1.4×10^14斯,比对照组提高了22倍.
- 确定PDN的单片开基态是这些性能改进的关键.
结论:
- 这项研究成功地展示了一种新方法,用于增强有机光探测器增益,使用具有单片开基态的聚合物.
- PDN聚合物为开发用于弱光信号检测的高性能低噪音光电探测器提供了有前途的材料.
- 这项工作为下一代光电子设备铺平了道路,具有更高的灵敏度和效率.
更多相关视频
08:29Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
Published on: January 10, 2017
9.1K
06:16Monitoring the Effects of Illumination on the Structure of Conjugated Polymer Gels Using Neutron Scattering
Published on: December 21, 2017
5.7K
相关概念视频
01:26Photochemical Electrocyclic Reactions: Stereochemistry
1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.8K
01:25Deactivation Processes: Jablonski Diagram
689
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
689
01:23Photoluminescence: Fluorescence and Phosphorescence
2.1K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
2.1K