Atto‐Scale Noise Near‐Infrared Organic Photodetectors Enabled by Controlling Interfacial Energetic Offset through Enhanced Anchoring Ability

Author:

Kim Tae Hyuk1,Lee Ji Hyeon2,Jang Min Ho3,Lee Gyeong Min1,Shim Eun Soo2,Oh Seunghyun1,Saeed Muhammad Ahsan1,Lee Min Jong1,Yu Byoung‐Soo45,Hwang Do Kyung456,Park Chae Won3,Lee Sae Youn2ORCID,Jo Jea Woong2ORCID,Shim Jae Won1ORCID

Affiliation:

1. School of Electrical Engineering Korea University Seoul 02841 Republic of Korea

2. Department of Energy and Materials Engineering Dongguk University Seoul 04620 Republic of Korea

3. Department of Advanced Battery Convergence Engineering Dongguk University Seoul 04620 Republic of Korea

4. Center for Opto‐Electronic Materials and Devices Post‐Silicon Semiconductor Institute Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea

5. Division of Nanoscience and Technology KIST School University of Science and Technology (UST) Seoul 02792 Republic of Korea

6. KU‐KIST Graduate School of Converging Science and Technology Korea University Seoul 02841 Republic of Korea

Abstract

AbstractThe near‐infrared (NIR) sensor technology is crucial for various applications such as autonomous driving and biometric tracking. Silicon photodetectors (SiPDs) are widely used in NIR applications; however, their scalability is limited by their crystalline properties. Organic photodetectors (OPDs) have attracted attention for NIR applications owing to their scalability, low‐temperature processing, and notably low dark current density (JD), which is similar to that of SiPDs. However, the still high JD (at NIR band) and few measurements of noise equivalent powers (NEPs) pose challenges for accurate performance comparisons. This study addresses these issues by quantitatively characterizing the performance matrix and JD generation mechanism using electron‐blocking layers (EBLs) in OPDs. The energy offset at an EBL/photosensitive layer interface determines the thermal activation energy and directly affects JD. A newly synthesized EBL (3PAFBr) substantially enhances the interfacial energy barrier by forming a homogeneous contact owing to the improved anchoring ability of 3PAFBr. As a result, the OPD with 3PAFBr yields a noise current of 852 aA (JD = 12.3 fA cm⁻2 at V → −0.1 V) and several femtowatt‐scale NEPs. As far as it is known, this is an ultralow of JD in NIR OPDs. This emphasizes the necessity for quantitative performance characterization.

Funder

National Research Foundation of Korea

Publisher

Wiley

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3