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通过石墨烯有机杂化光子阻垒制备冷阱介导的宽动态光探测器件
作者:小柯机器人 发布时间:2021/1/12 16:50:48

韩国延世大学Jeong Ho Cho小组提出了通过石墨烯有机杂化光子阻垒制备冷阱介导的宽动态光探测器件的策略。相关研究成果发表在2021年1月7日出版的《美国化学会志》。

提高有机光子器件性能的最常用方法之一是通过化学修饰来控制电异质电荷转移界面。尽管进行了大量的研究工作,但是由于有机化合物的化学多功能性导致材料进化的速度很快,仅允许有限空间对特定材料的界面进行微调。这种局限性导致了完全依赖于每种材料的固有特性的不受控制的电荷复合行为;因此,普通的器件结构的潜力不能被充分利用。

在该项工作中,研究人员展示了使用石墨烯-有机杂化阻垒型光电三极管架构作为替代平台,以实现在宽动态范围内快速响应的线性和高灵敏度光电探测器。由于界面能量调制的能力,模型系统在电荷复合行为中表现出快速饱和和缓慢响应的“冷”陷阱(TC<3kT)的优势,导致了110dB的宽线性动态范围,以及D*和R的非传统照明驱动增量分别高达1013 Jones和360mA/W,超过了报道的最佳有机光电二极管。

研究结果表明,有机-石墨烯杂化光子阻垒结构可以为未来设计各种光子应用的高性能光电探测器开辟新的途径。

附:英文原文

Title: Cold-Trap-Mediated Broad Dynamic Photodetection in Graphene–Organic Hybrid Photonic Barristors

Author: Dong Un Lim, Sae Byeok Jo, Jeong Ho Cho

Issue&Volume: January 7, 2021

Abstract: One of the most popular approaches to improve the performance of organic photonic devices has been to control the electrically heterogeneous charge-transferring interfaces via chemical modifications. Despite intense research efforts, however, the rapid pace of material evolution through the chemical versatility of the organic compound allows only limited room for the fine-tuning of the interfaces exclusive to specific materials. This limitation leads to an ill-controlled charge recombination behavior that relies solely on the inherent characteristics of each material; thus, the common device architecture cannot harness its full potential. In this work, we demonstrate the use of a graphene–organic hybrid barristor-type phototriode architecture as an alternative platform to realize a linearly and highly photosensitive photodetector operating in a broad dynamic range with rapid temporal responses. With the capability of interfacial energetic modulation, our model system exhibits the dominance of swiftly saturable and slowly responding “cold” traps (TC < 3kT) in charge recombination behaviors, leading to a broad linear dynamic range of 110 dB as well as unconventional illumination-driven increments of both D* and R up to 1013 Jones and 360 mA/W, respectively, that surpass the best-reported organic photodiodes. Our findings demonstrate that the organic–graphene hybrid photonic barristor architecture can open new avenues to design high-performance photodetectors for various photonic applications in the future.

DOI: 10.1021/jacs.0c10634

Source: https://pubs.acs.org/doi/10.1021/jacs.0c10634

 

期刊信息

JACS:《美国化学会志》,创刊于1879年。隶属于美国化学会,最新IF:14.612
官方网址:https://pubs.acs.org/journal/jacsat
投稿链接:https://acsparagonplus.acs.org/psweb/loginForm?code=1000