{"title":"Performance improvement of an upconversion device through optimized carrier injection balance.","authors":"Xiaoyu Wang, Yuanhong Hu, Lixiang Chen, Haijun Jiang, Zhoudao Wang, Yanlian Lei","doi":"10.1364/OL.551584","DOIUrl":null,"url":null,"abstract":"<p><p>Enhancing carrier injection balance in near-infrared (NIR) to visible upconversion devices (UCDs) is crucial for improving efficiency and stability. This study presents the incorporation of an insulating polymer (polymethyl methacrylate (PMMA)) between an aluminum cathode and an electron transport layer to reduce excess electrons in a light-emitting layer, thus balancing electrode-injected electrons and NIR-generated holes. The optimized device achieved a fivefold increase in maximum luminance and upconversion efficiency compared to the control. Additionally, it demonstrated a fast optical response, a broad optical modulation range, and significant potential for bioimaging applications, achieving a maximum resolution of 1693 dpi. This approach provides an effective solution for enhancing carrier injection balance in UCDs.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 4","pages":"1361-1364"},"PeriodicalIF":3.1000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.551584","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Enhancing carrier injection balance in near-infrared (NIR) to visible upconversion devices (UCDs) is crucial for improving efficiency and stability. This study presents the incorporation of an insulating polymer (polymethyl methacrylate (PMMA)) between an aluminum cathode and an electron transport layer to reduce excess electrons in a light-emitting layer, thus balancing electrode-injected electrons and NIR-generated holes. The optimized device achieved a fivefold increase in maximum luminance and upconversion efficiency compared to the control. Additionally, it demonstrated a fast optical response, a broad optical modulation range, and significant potential for bioimaging applications, achieving a maximum resolution of 1693 dpi. This approach provides an effective solution for enhancing carrier injection balance in UCDs.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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