Platinum (II) azatetrabenzoporphyrins for near-infrared organic light emitting diodes

Huang, L.; Park, C. D.; Fleetham, T.; Li, J.

doi:10.1063/1.4971363

Title: Platinum (II) azatetrabenzoporphyrins for near-infrared organic light emitting diodes

Journal Article · Mon Dec 05 00:00:00 EST 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4971363· OSTI ID:1465953

Huang, L. ^[1]; Park, C. D. ^[1]; Fleetham, T. ^[1]; Li, J. ^[1]

Arizona State Univ., Tempe, AZ (United States). Materials Science and Engineering Program

In this paper, we describe a series of platinum (II) azatetrabenzoporphyrin emitters for near-infrared (NIR) organic light emitting diode (OLED) applications. Platinum (II) aza-triphenyltetrabenzoporphyrin (PtNTBP) results in a 72 nm shift in the photoluminescent (PL) emission spectrum to 842nm compared to 770nm of the platinum (II) tetraphenyltetrabenzoporphyrin (PtTPTBP). Also, the full width at half maximum of the emission spectrum of PtNTBP was significantly narrowed to 27 nm compared to 40nm for PtTPTBP. The multilayer devices fabricated by thermal vacuum evaporation process employing PtTPTBP, PtNTBP, and cis-PtN₂TBP exhibit electroluminescent (EL) emission peak at 770 nm, 848 nm, and 846 nm with the peak external quantum efficiency (EQE) of 8.0%, 2.8%, and 1.5%, respectively. Even with the decrease in EQE of devices employing PtNTBP and cis-PtN₂TBP compared with those employing PtTPTBP, the combination of the spectral narrowing and the bathochromic shift to lower energy EL emission demonstrates the promise of PtNTBP for NIR applications. In the meanwhile, the solution-processed single-layer device using PtNTBP demonstrates the EQE of 0.33% and the peak EL emission at 844 nm.

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Research Organization:: Arizona State Univ., Tempe, AZ (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0007090

OSTI ID:: 1465953

Alternate ID(s):: OSTI ID: 1334365

Journal Information:: Applied Physics Letters, Vol. 109, Issue 23; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 19 works

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Near-Infrared Emitting Materials via Harvesting Triplet Excitons: Molecular Design, Properties, and Application in Organic Light Emitting Diodes Zhang, Youming; Wang, Yafei; Song, Jun Advanced Optical Materials, Vol. 6, Issue 18 https://doi.org/10.1002/adom.201800466	journal	July 2018
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Near‐Infrared (NIR) Organic Light‐Emitting Diodes (OLEDs): Challenges and Opportunities Zampetti, Andrea; Minotto, Alessandro; Cacialli, Franco Advanced Functional Materials, Vol. 29, Issue 44 https://doi.org/10.1002/adfm.201905825	journal	September 2019

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