基于瞬态激光响应的有机光电探测器阱态动力学参数提取方法

IF 2.7 4区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Organic Electronics Pub Date : 2025-05-16 DOI:10.1016/j.orgel.2025.107275

Sai Liu, Jiajie Liu, Ruipeng Chen, Miao Xu, Lei Wang, Weijing Wu, Junbiao Peng

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引用次数: 0

摘要

本文提出了一种基于电荷的有机光电探测器（OPD）瞬态激光响应模型，该模型考虑了捕获态的弛豫过程。基于该模型，捕获电荷的微观弛豫过程可以与OPD器件的宏观瞬态特性联系起来。因此，提出了一种提取陷阱状态动态参数的方法。制作了经典的P3HT: PCBM异质结OPD器件进行瞬态测试。由光室、电流放大器、示波器、信号发生器和激光器组成瞬态测试系统。从瞬态电流的弛豫时间提取电子捕获系数rn和捕获截面σ，分别为9.77 × 10−13 cm3/s和9.77 × 10−20 cm3。

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Extraction method of trap states dynamics parameters for organic photodetectors based on transient laser response

This paper presents a charge-based model for the transient laser response of an organic photodetector (OPD) device considering the relaxation process of trap states. Based on the proposed model, the microscopic relaxation process of trapped charge can be linked to the macroscopic transient characteristics of the OPD device. Consequently, an extraction method is developed to obtain the dynamic parameters of trap states. The classical P3HT: PCBM heterojunction OPD device was fabricated for transient testing. The transient test system was built using an optical chamber, current amplifier, oscilloscope, signal generator and laser. As a result, the electron capture coefficient r_n and the capture cross section σ were extracted from the relaxation time of the transient current, with values of 9.77 × 10⁻¹³ cm³/s and 9.77 × 10⁻²⁰ cm³, respectively.

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来源期刊

Organic Electronics 工程技术-材料科学：综合

CiteScore

6.60

自引率

6.20%

发文量

238

审稿时长

44 days

期刊介绍： Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc. Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.