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Title: Bright Deep Blue TADF OLEDs: The Role of Triphenylphosphine Oxide in NPB/TPBi:PPh 3O Exciplex Emission

Abstract

Very bright (≈14 000 cd m –2) deep blue exciplex organic light emitting diodes (OLEDs) peaking at ≈435 nm, where the photopic response is ≈0.033, and with CIE color coordinates (0.1525, 0.0820), are described. The OLED properties are interestingly linked to PPh 3O (triphenylphosphine oxide) and attributes of the emitting layer (EML) comprising NPB interfacing host:guest TPBi:PPh 3O 5:1 weight ratio. A neat PPh 3O layer that is central for device performance follows the EML (NPB/TPBi:PPh3O 5:1/PPh 3O). The bright electroluminescence originates from NPB/TPBi:PPh 3O exciplexes involving triplets via thermally activated delayed fluorescence, as evident from the strong quenching of the photoluminescence (PL) by oxygen and interestingly, the monomolecular emission process. The transient PL decay times of a NPB/TPBi:PPh 3O 5:1/PPh 3O film are 43 ns in air versus 136, 610, and weak ≈2000 ns in N 2. For comparison, the respective PL decay times of films of NPB:TPBi are 16 ns in air versus 131 and 600 ns in N 2, and of NPB:PPh 3O they are 29 ns in air versus 56, 483, and weak ≈2000 ns in N 2. Furthermore it is suspected that slow emitting states are associated with a PPh 3O aggregate interacting with NPB.

Authors:
 [1];  [1];  [1];  [2];  [3];  [3];  [2];  [1];  [4]; ORCiD logo [1]
  1. Ames Lab., and Iowa State Univ., Ames, IA (United States)
  2. Bowling Green State Univ., Bowling Green, OH (United States)
  3. Oklahoma State Univ., Stillwater, OK (United States)
  4. Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1575203
Alternate Identifier(s):
OSTI ID: 1574072
Report Number(s):
IS-J-10049
Journal ID: ISSN 2195-1071
Grant/Contract Number:  
AC02‐07CH11358; ECCS 1202309
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Optical Materials
Additional Journal Information:
Journal Name: Advanced Optical Materials; Journal ID: ISSN 2195-1071
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
all‐organic OLEDs; bright deep blue OLEDs; exciplex TADF OLEDs

Citation Formats

Hippola, Chamika, Danilovic, Dusan, Bhattacharjee, Ujjal, Perez‐Bolivar, Cesar, Sachinthani, K. A. Niradha, Nelson, Toby L., Anzenbacher, Pavel, Petrich, Jacob W., Shinar, Ruth, and Shinar, Joseph. Bright Deep Blue TADF OLEDs: The Role of Triphenylphosphine Oxide in NPB/TPBi:PPh3O Exciplex Emission. United States: N. p., 2019. Web. doi:10.1002/adom.201901282.
Hippola, Chamika, Danilovic, Dusan, Bhattacharjee, Ujjal, Perez‐Bolivar, Cesar, Sachinthani, K. A. Niradha, Nelson, Toby L., Anzenbacher, Pavel, Petrich, Jacob W., Shinar, Ruth, & Shinar, Joseph. Bright Deep Blue TADF OLEDs: The Role of Triphenylphosphine Oxide in NPB/TPBi:PPh3O Exciplex Emission. United States. doi:10.1002/adom.201901282.
Hippola, Chamika, Danilovic, Dusan, Bhattacharjee, Ujjal, Perez‐Bolivar, Cesar, Sachinthani, K. A. Niradha, Nelson, Toby L., Anzenbacher, Pavel, Petrich, Jacob W., Shinar, Ruth, and Shinar, Joseph. Wed . "Bright Deep Blue TADF OLEDs: The Role of Triphenylphosphine Oxide in NPB/TPBi:PPh3O Exciplex Emission". United States. doi:10.1002/adom.201901282.
@article{osti_1575203,
title = {Bright Deep Blue TADF OLEDs: The Role of Triphenylphosphine Oxide in NPB/TPBi:PPh3O Exciplex Emission},
author = {Hippola, Chamika and Danilovic, Dusan and Bhattacharjee, Ujjal and Perez‐Bolivar, Cesar and Sachinthani, K. A. Niradha and Nelson, Toby L. and Anzenbacher, Pavel and Petrich, Jacob W. and Shinar, Ruth and Shinar, Joseph},
abstractNote = {Very bright (≈14 000 cd m–2) deep blue exciplex organic light emitting diodes (OLEDs) peaking at ≈435 nm, where the photopic response is ≈0.033, and with CIE color coordinates (0.1525, 0.0820), are described. The OLED properties are interestingly linked to PPh3O (triphenylphosphine oxide) and attributes of the emitting layer (EML) comprising NPB interfacing host:guest TPBi:PPh3O 5:1 weight ratio. A neat PPh3O layer that is central for device performance follows the EML (NPB/TPBi:PPh3O 5:1/PPh3O). The bright electroluminescence originates from NPB/TPBi:PPh3O exciplexes involving triplets via thermally activated delayed fluorescence, as evident from the strong quenching of the photoluminescence (PL) by oxygen and interestingly, the monomolecular emission process. The transient PL decay times of a NPB/TPBi:PPh3O 5:1/PPh3O film are 43 ns in air versus 136, 610, and weak ≈2000 ns in N2. For comparison, the respective PL decay times of films of NPB:TPBi are 16 ns in air versus 131 and 600 ns in N2, and of NPB:PPh3O they are 29 ns in air versus 56, 483, and weak ≈2000 ns in N2. Furthermore it is suspected that slow emitting states are associated with a PPh3O aggregate interacting with NPB.},
doi = {10.1002/adom.201901282},
journal = {Advanced Optical Materials},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {11}
}

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Works referenced in this record:

Blue exciplex emission and its role as a host of phosphorescent emitter
journal, September 2015


Controlling Singlet-Triplet Energy Splitting for Deep-Blue Thermally Activated Delayed Fluorescence Emitters
journal, December 2016

  • Cui, Lin-Song; Nomura, Hiroko; Geng, Yan
  • Angewandte Chemie International Edition, Vol. 56, Issue 6
  • DOI: 10.1002/anie.201609459

Enhancing Reverse Intersystem Crossing via Secondary Acceptors: toward Sky-Blue Fluorescent Diodes with 10-Fold Improved External Quantum Efficiency
journal, January 2019

  • Fan, Xuefeng; Li, Chenyu; Wang, Zicheng
  • ACS Applied Materials & Interfaces, Vol. 11, Issue 4
  • DOI: 10.1021/acsami.8b18041

Deep Blue Exciplex Organic Light-Emitting Diodes with Enhanced Efficiency; P-type or E-type Triplet Conversion to Singlet Excitons?
journal, December 2012

  • Jankus, Vygintas; Chiang, Chien-Jung; Dias, Fernando
  • Advanced Materials, Vol. 25, Issue 10
  • DOI: 10.1002/adma.201203615

Blue organic light-emitting diodes realizing external quantum efficiency over 25% using thermally activated delayed fluorescence emitters
journal, March 2017


Organic Photodetectors in Analytical Applications
journal, September 2015


High-efficiency organic electrophosphorescent devices with tris(2-phenylpyridine)iridium doped into electron-transporting materials
journal, August 2000

  • Adachi, Chihaya; Baldo, Marc A.; Forrest, Stephen R.
  • Applied Physics Letters, Vol. 77, Issue 6
  • DOI: 10.1063/1.1306639

Photophysics of thermally activated delayed fluorescence molecules
journal, March 2017

  • Dias, Fernando B.; Penfold, Thomas J.; Monkman, Andrew P.
  • Methods and Applications in Fluorescence, Vol. 5, Issue 1
  • DOI: 10.1088/2050-6120/aa537e

High-efficiency organic light-emitting diodes with fluorescent emitters
journal, May 2014

  • Nakanotani, Hajime; Higuchi, Takahiro; Furukawa, Taro
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms5016

Exciplex: An Intermolecular Charge-Transfer Approach for TADF
journal, April 2018

  • Sarma, Monima; Wong, Ken-Tsung
  • ACS Applied Materials & Interfaces, Vol. 10, Issue 23
  • DOI: 10.1021/acsami.7b18318

Study of Charge-Transfer Complexes of [60]- and [70]Fullerenes with a Series of Phosphine Oxides
journal, November 2003

  • Bhattacharya, Sumanta; Nayak, Sandip K.; Chattopadhyay, Subrata
  • The Journal of Physical Chemistry B, Vol. 107, Issue 47
  • DOI: 10.1021/jp0357370

Low voltage organic light-emitting devices with triphenylphosphine oxide layer
journal, July 2008

  • Ha, Mi-Young; Moon, Dae-Gyu
  • Applied Physics Letters, Vol. 93, Issue 4
  • DOI: 10.1063/1.2960348

Highly Efficient Non-Doped Blue-Light-Emitting Diodes Based on an Anthrancene Derivative End-Capped with Tetraphenylethylene Groups
journal, September 2007

  • Shih, P. -I; Chuang, C. -Y.; Chien, C. -H.
  • Advanced Functional Materials, Vol. 17, Issue 16
  • DOI: 10.1002/adfm.200700355

Organic Light-Emitting Diode Sensing Platform: Challenges and Solutions
journal, October 2011

  • Liu, Rui; Cai, Yuankun; Park, Joong-Mok
  • Advanced Functional Materials, Vol. 21, Issue 24
  • DOI: 10.1002/adfm.201101536

Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence
journal, July 2013

  • Nakanotani, Hajime; Masui, Kensuke; Nishide, Junichi
  • Scientific Reports, Vol. 3, Issue 1
  • DOI: 10.1038/srep02127

Organic light-emitting diodes employing efficient reverse intersystem crossing for triplet-to-singlet state conversion
journal, March 2012


Design of Efficient Thermally Activated Delayed Fluorescence Materials for Pure Blue Organic Light Emitting Diodes
journal, August 2012

  • Zhang, Qisheng; Li, Jie; Shizu, Katsuyuki
  • Journal of the American Chemical Society, Vol. 134, Issue 36
  • DOI: 10.1021/ja306538w

Highly efficient Organic Light-Emitting Diodes from thermally activated delayed fluorescence using a sulfone–carbazole host material
journal, January 2015


Triazine-phosphine oxide electron transporter for ultralow-voltage-driven sky blue PHOLEDs
journal, January 2015

  • Jia, Jilin; Zhu, Liping; Wei, Ying
  • Journal of Materials Chemistry C, Vol. 3, Issue 19
  • DOI: 10.1039/C4TC02993C

Triphenylphosphine oxide as a crystallization aid
journal, January 1988

  • Etter, Margaret C.; Baures, Paul W.
  • Journal of the American Chemical Society, Vol. 110, Issue 2
  • DOI: 10.1021/ja00210a076

MoO 3 as combined hole injection layer and tapered spacer in combinatorial multicolor microcavity organic light emitting diodes
journal, August 2011

  • Liu, Rui; Xu, Chun; Biswas, Rana
  • Applied Physics Letters, Vol. 99, Issue 9
  • DOI: 10.1063/1.3623482

Determination of the interface energy level alignment of a doped organic hetero-junction using capacitance–voltage measurements
journal, November 2012


Organic light-emitting devices with triphenylphosphine oxide layer
journal, September 2008


Ultraviolet electroluminescence and blue-green phosphorescence using an organic diphosphine oxide charge transporting layer
journal, May 2006

  • Burrows, P. E.; Padmaperuma, A. B.; Sapochak, L. S.
  • Applied Physics Letters, Vol. 88, Issue 18
  • DOI: 10.1063/1.2193429

Phosphine oxide derivatives for organic light emitting diodes
journal, January 2012


Deep blue phosphorescent organic light-emitting diodes with very high brightness and efficiency
journal, October 2015

  • Lee, Jaesang; Chen, Hsiao-Fan; Batagoda, Thilini
  • Nature Materials, Vol. 15, Issue 1, p. 92-98
  • DOI: 10.1038/nmat4446

Highly efficient organic light-emitting diodes from delayed fluorescence
journal, December 2012

  • Uoyama, Hiroki; Goushi, Kenichi; Shizu, Katsuyuki
  • Nature, Vol. 492, Issue 7428
  • DOI: 10.1038/nature11687

Purely Organic Thermally Activated Delayed Fluorescence Materials for Organic Light-Emitting Diodes
journal, March 2017


Organophosphorus derivatives for electronic devices
journal, January 2016

  • Joly, D.; Bouit, P. -A.; Hissler, M.
  • Journal of Materials Chemistry C, Vol. 4, Issue 17
  • DOI: 10.1039/C6TC00590J

Investigation of the Mechanisms Giving Rise to TADF in Exciplex States
journal, August 2016

  • dos Santos, Paloma L.; Dias, Fernando B.; Monkman, Andrew P.
  • The Journal of Physical Chemistry C, Vol. 120, Issue 32
  • DOI: 10.1021/acs.jpcc.6b05198

High efficiency blue fluorescent organic light-emitting diodes using a conventional blue fluorescent emitter
journal, January 2015

  • Lee, In Ho; Song, Wook; Lee, Jun Yeob
  • Journal of Materials Chemistry C, Vol. 3, Issue 34
  • DOI: 10.1039/C5TC01626F

Degradation Mechanism and Lifetime Improvement Strategy for Blue Phosphorescent Organic Light-Emitting Diodes
journal, March 2017


Removing shortcomings of linear molecules to develop high efficiencies deep-blue organic electroluminescent materials
journal, November 2016


Tenfold increase in the lifetime of blue phosphorescent organic light-emitting diodes
journal, September 2014

  • Zhang, Yifan; Lee, Jaesang; Forrest, Stephen R.
  • Nature Communications, Vol. 5, Article No. 5008
  • DOI: 10.1038/ncomms6008

Nearly 100% internal phosphorescence efficiency in an organic light-emitting device
journal, November 2001

  • Adachi, Chihaya; Baldo, Marc A.; Thompson, Mark E.
  • Journal of Applied Physics, Vol. 90, Issue 10
  • DOI: 10.1063/1.1409582

High-Purity-Blue and High-Efficiency Electroluminescent Devices Based on Anthracene
journal, November 2005

  • Kim, Y. -H.; Jeong, H. -C.; Kim, S. -H.
  • Advanced Functional Materials, Vol. 15, Issue 11
  • DOI: 10.1002/adfm.200500051

White organic light-emitting diodes with fluorescent tube efficiency
journal, May 2009

  • Reineke, Sebastian; Lindner, Frank; Schwartz, Gregor
  • Nature, Vol. 459, Issue 7244
  • DOI: 10.1038/nature08003

HATCN-based Charge Recombination Layers as Effective Interconnectors for Tandem Organic Solar Cells
journal, August 2014

  • Wang, Rong-Bin; Wang, Qian-Kun; Xie, Hao-Jun
  • ACS Applied Materials & Interfaces, Vol. 6, Issue 17
  • DOI: 10.1021/am504620x

High triplet energy exciplex hosts for deep blue phosphorescent organic light-emitting diodes
journal, January 2017

  • Song, Wook; Lee, Ha Lim; Lee, Jun Yeob
  • Journal of Materials Chemistry C, Vol. 5, Issue 24
  • DOI: 10.1039/C7TC01552F

Blue fluorescent emitters: design tactics and applications in organic light-emitting diodes
journal, January 2013

  • Zhu, Minrong; Yang, Chuluo
  • Chemical Society Reviews, Vol. 42, Issue 12
  • DOI: 10.1039/c3cs35440g

Charge carriers and charge-transfer reactions in OLED devices studied by electron paramagnetic resonance
journal, January 2010

  • Pawlik, Thomas D.; Kondakov, Denis Y.; Begley, William J.
  • Journal of the Society for Information Display, Vol. 18, Issue 4
  • DOI: 10.1889/JSID18.4.277

Oxadiazole- and triazole-based highly-efficient thermally activated delayed fluorescence emitters for organic light-emitting diodes
journal, January 2013

  • Lee, Jiyoung; Shizu, Katsuyuki; Tanaka, Hiroyuki
  • Journal of Materials Chemistry C, Vol. 1, Issue 30
  • DOI: 10.1039/c3tc30699b

Mixed-host-emitting layer for high-efficiency organic light-emitting diodes
journal, July 2014


New Charge Transporting Host Material for Short Wavelength Organic Electrophosphorescence:  2,7-Bis(diphenylphosphine oxide)-9,9-dimethylfluorene
journal, May 2006

  • Padmaperuma, Asanga B.; Sapochak, Linda S.; Burrows, Paul E.
  • Chemistry of Materials, Vol. 18, Issue 9
  • DOI: 10.1021/cm0600677

A phosphine oxide derivative as a universal electron transport material for organic light-emitting diodes
journal, January 2009

  • Jeon, Soon Ok; Yook, Kyoung Soo; Joo, Chul Woong
  • Journal of Materials Chemistry, Vol. 19, Issue 33
  • DOI: 10.1039/b906088j

High Quantum Efficiency in Organic Light-Emitting Devices with Iridium-Complex as a Triplet Emissive Center
journal, December 1999

  • Tsutsui, Tetsuo; Yang, Moon-Jae; Yahiro, Masayuki
  • Japanese Journal of Applied Physics, Vol. 38, Issue Part 2, No. 12B
  • DOI: 10.1143/JJAP.38.L1502

High-Performance Green OLEDs Using Thermally Activated Delayed Fluorescence with a Power Efficiency of over 100 lm W −1
journal, February 2016

  • Seino, Yuki; Inomata, Susumu; Sasabe, Hisahiro
  • Advanced Materials, Vol. 28, Issue 13
  • DOI: 10.1002/adma.201503782