{"title":"通过界面和波段工程实现有机-MOF 复合物的光电倍增","authors":"Medha Joshi, Sampati Rao Sridhar, Upendra Kumar Verma, Brijesh Kumar","doi":"10.1063/5.0222327","DOIUrl":null,"url":null,"abstract":"This work studies a hybrid broadband photodetector with and without metal–organic framework nanosheets with an inverted structure. It is observed that an inverted structure provides photomultiplication in the devices with both positive and negative biases. This phenomenon is believed to be due to a non-uniform TiO2/active layer interface where the porosity of TiO2 facilitates structural traps, in turn achieving photomultiplication in P3HT: PCBM (1:1) devices. Meanwhile, in photodetectors with an active layer of P3HT:ZnTCPP:PCBM (1:0.5:1), photomultiplication is attributed to interface traps and band alignment due to ZnTCPP nanosheets. The presence of ZnTCPP reduces the dip in EQE at 370–460 and 530–610 nm range, thus improving broadband detection (300–700 nm). Adding ZnTCPP to the devices results in improved rise and fall times. The on–off response is also relatively stable for the devices with ZnTCPP and has high detectivity (1011 Jones). Thus, this study sheds light on the role of a thin interface layer of TiO2 in photomultiplication and improving performance parameters with ZnTCPP nanosheets.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Achieving photomultiplication in organic-MOF complex via interface and band engineering\",\"authors\":\"Medha Joshi, Sampati Rao Sridhar, Upendra Kumar Verma, Brijesh Kumar\",\"doi\":\"10.1063/5.0222327\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This work studies a hybrid broadband photodetector with and without metal–organic framework nanosheets with an inverted structure. It is observed that an inverted structure provides photomultiplication in the devices with both positive and negative biases. This phenomenon is believed to be due to a non-uniform TiO2/active layer interface where the porosity of TiO2 facilitates structural traps, in turn achieving photomultiplication in P3HT: PCBM (1:1) devices. Meanwhile, in photodetectors with an active layer of P3HT:ZnTCPP:PCBM (1:0.5:1), photomultiplication is attributed to interface traps and band alignment due to ZnTCPP nanosheets. The presence of ZnTCPP reduces the dip in EQE at 370–460 and 530–610 nm range, thus improving broadband detection (300–700 nm). Adding ZnTCPP to the devices results in improved rise and fall times. The on–off response is also relatively stable for the devices with ZnTCPP and has high detectivity (1011 Jones). Thus, this study sheds light on the role of a thin interface layer of TiO2 in photomultiplication and improving performance parameters with ZnTCPP nanosheets.\",\"PeriodicalId\":8094,\"journal\":{\"name\":\"Applied Physics Letters\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-10-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Physics Letters\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1063/5.0222327\",\"RegionNum\":2,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics Letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1063/5.0222327","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
Achieving photomultiplication in organic-MOF complex via interface and band engineering
This work studies a hybrid broadband photodetector with and without metal–organic framework nanosheets with an inverted structure. It is observed that an inverted structure provides photomultiplication in the devices with both positive and negative biases. This phenomenon is believed to be due to a non-uniform TiO2/active layer interface where the porosity of TiO2 facilitates structural traps, in turn achieving photomultiplication in P3HT: PCBM (1:1) devices. Meanwhile, in photodetectors with an active layer of P3HT:ZnTCPP:PCBM (1:0.5:1), photomultiplication is attributed to interface traps and band alignment due to ZnTCPP nanosheets. The presence of ZnTCPP reduces the dip in EQE at 370–460 and 530–610 nm range, thus improving broadband detection (300–700 nm). Adding ZnTCPP to the devices results in improved rise and fall times. The on–off response is also relatively stable for the devices with ZnTCPP and has high detectivity (1011 Jones). Thus, this study sheds light on the role of a thin interface layer of TiO2 in photomultiplication and improving performance parameters with ZnTCPP nanosheets.
期刊介绍:
Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology.
In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics.
APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field.
Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.