Hoang Mai Luong , Sangmin Chae , Ahra Yi , Jirat Chatsirisupachai , Brian Minki Kim , Yuxiang Wan , Vinich Promarak , Hyo Jung Kim , Thuc-Quyen Nguyen
{"title":"通过交联共轭聚电解质空穴传输层实现近红外有机光电探测器的超低暗电流","authors":"Hoang Mai Luong , Sangmin Chae , Ahra Yi , Jirat Chatsirisupachai , Brian Minki Kim , Yuxiang Wan , Vinich Promarak , Hyo Jung Kim , Thuc-Quyen Nguyen","doi":"10.1016/j.matt.2024.05.010","DOIUrl":null,"url":null,"abstract":"<div><p>Organic photodetectors (OPDs) are of great interest for detecting near-infrared (NIR) and shortwave-infrared (SWIR) light due to their excellent photosensing capabilities and cost effectiveness. Hereby, we explore the use of a (3-glycidyloxypropyl)trimethoxysilane crosslinker in a conjugated polyelectrolyte (CPE) hole-transporting layer (HTL), which effectively boosts the stability and processability of the CPE as well as the sensitivity of the devices. We apply two rules for optimizing HTLs to reduce the dark current: conductivity/morphology regulation (via added crosslinker) and energy band alignment between the active layer and HTL (via molecular design), which enable a dark current density (<em>J</em><sub>d</sub>) of ∼1 nA cm<sup>−2</sup> at −5 V for OPDs with sensitivity at <em>λ</em> > 1,000 nm. Intriguingly, we found that the thermal activation energy of <em>J</em><sub>d</sub> for the device with the champion condition is slightly lower than the blend’s effective band gap of the active layer. This observation might open another perspective on the factors influencing <em>J</em><sub>d</sub> in NIR-SWIR OPDs.</p></div>","PeriodicalId":388,"journal":{"name":"Matter","volume":null,"pages":null},"PeriodicalIF":17.3000,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Ultralow dark current in near-infrared organic photodetector via crosslinked conjugated polyelectrolyte hole-transporting layer\",\"authors\":\"Hoang Mai Luong , Sangmin Chae , Ahra Yi , Jirat Chatsirisupachai , Brian Minki Kim , Yuxiang Wan , Vinich Promarak , Hyo Jung Kim , Thuc-Quyen Nguyen\",\"doi\":\"10.1016/j.matt.2024.05.010\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Organic photodetectors (OPDs) are of great interest for detecting near-infrared (NIR) and shortwave-infrared (SWIR) light due to their excellent photosensing capabilities and cost effectiveness. Hereby, we explore the use of a (3-glycidyloxypropyl)trimethoxysilane crosslinker in a conjugated polyelectrolyte (CPE) hole-transporting layer (HTL), which effectively boosts the stability and processability of the CPE as well as the sensitivity of the devices. We apply two rules for optimizing HTLs to reduce the dark current: conductivity/morphology regulation (via added crosslinker) and energy band alignment between the active layer and HTL (via molecular design), which enable a dark current density (<em>J</em><sub>d</sub>) of ∼1 nA cm<sup>−2</sup> at −5 V for OPDs with sensitivity at <em>λ</em> > 1,000 nm. Intriguingly, we found that the thermal activation energy of <em>J</em><sub>d</sub> for the device with the champion condition is slightly lower than the blend’s effective band gap of the active layer. This observation might open another perspective on the factors influencing <em>J</em><sub>d</sub> in NIR-SWIR OPDs.</p></div>\",\"PeriodicalId\":388,\"journal\":{\"name\":\"Matter\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":17.3000,\"publicationDate\":\"2024-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Matter\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2590238524002352\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Matter","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2590238524002352","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Ultralow dark current in near-infrared organic photodetector via crosslinked conjugated polyelectrolyte hole-transporting layer
Organic photodetectors (OPDs) are of great interest for detecting near-infrared (NIR) and shortwave-infrared (SWIR) light due to their excellent photosensing capabilities and cost effectiveness. Hereby, we explore the use of a (3-glycidyloxypropyl)trimethoxysilane crosslinker in a conjugated polyelectrolyte (CPE) hole-transporting layer (HTL), which effectively boosts the stability and processability of the CPE as well as the sensitivity of the devices. We apply two rules for optimizing HTLs to reduce the dark current: conductivity/morphology regulation (via added crosslinker) and energy band alignment between the active layer and HTL (via molecular design), which enable a dark current density (Jd) of ∼1 nA cm−2 at −5 V for OPDs with sensitivity at λ > 1,000 nm. Intriguingly, we found that the thermal activation energy of Jd for the device with the champion condition is slightly lower than the blend’s effective band gap of the active layer. This observation might open another perspective on the factors influencing Jd in NIR-SWIR OPDs.
期刊介绍:
Matter, a monthly journal affiliated with Cell, spans the broad field of materials science from nano to macro levels,covering fundamentals to applications. Embracing groundbreaking technologies,it includes full-length research articles,reviews, perspectives,previews, opinions, personnel stories, and general editorial content.
Matter aims to be the primary resource for researchers in academia and industry, inspiring the next generation of materials scientists.