Sheng-Fu Wang, Chi-Chi Wu, Pi-Tai Chou, Yu-Cheng Kung, Wen-Yi Hung, Cheng-Ju Yu, Chia-Hsiu Yeh, Fan Zhou, Jie Yan and Yun Chi
{"title":"Pt(ii) phosphors with dual 1,6-naphthyridin-5-yl pyrazolate chelates and non-doped organic light emitting diodes†","authors":"Sheng-Fu Wang, Chi-Chi Wu, Pi-Tai Chou, Yu-Cheng Kung, Wen-Yi Hung, Cheng-Ju Yu, Chia-Hsiu Yeh, Fan Zhou, Jie Yan and Yun Chi","doi":"10.1039/D4TC02716G","DOIUrl":null,"url":null,"abstract":"<p >Pt(<small>II</small>) metal complexes are known for having strong intermolecular Pt⋯Pt interaction in the condensed phases, to which the associated metal–metal-to-ligand charge transfer (MMLCT) transition characteristics allowed the effective generation of long-wavelength emission down to the red and near-infrared region. To expand the scope of the designs, we synthesized three homoleptic Pt(<small>II</small>) complexes <strong>Pt(a)</strong>, <strong>Pt(b)</strong>, and <strong>Pt(c)</strong> using chelating naphthyridinyl pyrazolates, which exhibited efficient emission peaks centered at 681, 690 and 723 nm as the vacuum deposited thin film. Upon fabrication of OLED devices, device <strong>Pt(b)</strong> achieved emission centered at 676 nm, maximum EQE of 25.6% with suppressed efficiency roll-off. Furthermore, device <strong>Pt(c)</strong> exhibited emission peaking at 710 nm and a slightly inferior but still remarkable max. EQE of 17.8%, paving a basis for further exploration of these self-aggregated Pt(<small>II</small>) metal phosphors and optimization of relevant NIR OLED devices.</p>","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry C","FirstCategoryId":"1","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/tc/d4tc02716g","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Pt(II) metal complexes are known for having strong intermolecular Pt⋯Pt interaction in the condensed phases, to which the associated metal–metal-to-ligand charge transfer (MMLCT) transition characteristics allowed the effective generation of long-wavelength emission down to the red and near-infrared region. To expand the scope of the designs, we synthesized three homoleptic Pt(II) complexes Pt(a), Pt(b), and Pt(c) using chelating naphthyridinyl pyrazolates, which exhibited efficient emission peaks centered at 681, 690 and 723 nm as the vacuum deposited thin film. Upon fabrication of OLED devices, device Pt(b) achieved emission centered at 676 nm, maximum EQE of 25.6% with suppressed efficiency roll-off. Furthermore, device Pt(c) exhibited emission peaking at 710 nm and a slightly inferior but still remarkable max. EQE of 17.8%, paving a basis for further exploration of these self-aggregated Pt(II) metal phosphors and optimization of relevant NIR OLED devices.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors