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随着光谱信息在环境监测、生物医学诊断和智能终端等领域的应用日益广泛，微型化、高性能光谱仪的研发成为研究热点。计算光谱重构型光谱仪为突破传统光谱仪体积与精度限制提供了有效路径，而高响应度及可调非线性响应特性的光电探测器则是实现该技术的核心。本研究构建了一种基于聚(3-己基噻吩)(P3HT)和[6，6]-苯基-C71-丁酸甲酯(PC71BM)本体异质结的有机光电探测器(OPD)。通过系统调控活性层厚度、器件结构、给受体比例及电子传输层组成，显著提升了器件的响应度与非线性响应能力。在自驱动模式及偏压调控下，所设计的器件表现出良好的非线性响应特性，峰值响应度高达1.2 A/W，归一化响应度曲线在多偏压条件下表现出明显的不重合趋势。研究结果为单器件级别的光谱重构提供了坚实的器件基础，展现出有机光电器件在微型化、智能化光谱系统中的巨大应用潜力。
Abstract：With the widespread application of spectral information in fields such as environmental monitoring， biomedical diagnostics， and intelligent terminals， the development of miniaturized， high-performance spectrometers has become a research hotspot. Computational spectral reconstruction-based spectrometers provide an effective approach to overcoming the limitations of traditional spectrometers in terms of size and resolution. High-responsivity photodetectors with tunable nonlinear response characteristics are key to enabling this technology. In this study， an organic photodetector (OPD) based on a bulk heterojunction of poly(3-hexylthiophene) (P3HT) and [6，6]-phenyl-C71-butyric acid methyl ester (PC71BM) is developed. By systematically tuning the active layer thickness， device architecture， donor-to-acceptor ratio， and electron transport layer composition， the responsivity and nonlinear response characteristics of the device are significantly enhanced the designed device exhibite pronounced nonlinear response behavior under various bias， with a peak responsivity of up to 1.2 A/W. The normalized responsivity curves under different bias voltages showed evident non-overlapping trends. These results provide a solid device-level foundation for spectral reconstruction using a single detector， demonstrating the great potential of organic photodetectors in miniaturized and intelligent spectroscopic systems.
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基本信息:
DOI：10.16026/j.cnki.iea.2025070054
中图分类号:TN36;TQ317
引用信息:
[1]秦灏,李光辉,陈永胜.有机光电探测器响应度的非线性调控与性能优化研究[J].离子交换与吸附().DOI:10.16026/j.cnki.iea.2025070054.
基金信息:
国家重点研发项目(2022YFB4200400)
2025-07-21
2025-07-21
2025-07-21