Effect of Photoreactive SAM at the Interface of an Indium-Tin Oxide Electrode and a Polymer Hole Transport Layer

Seong-Ho KIM; Hanae OHTSUKA; Rigoberto C. ADVINCULA; Kuniaki TANAKA; Hiroaki USUI

doi:10.1587/transele.E96.C.365

Effect of Photoreactive SAM at the Interface of an Indium-Tin Oxide Electrode and a Polymer Hole Transport Layer

Seong-Ho KIM, Hanae OHTSUKA, Rigoberto C. ADVINCULA, Kuniaki TANAKA, Hiroaki USUI

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A self-assembled monolayer having a benzophenone unit as a photoreactive terminal group (BP-SAM) was prepared on an indium-tin oxide (ITO) electrode, on which a hole-transport layer of a phenoxazine-dioctylfluorene copolymer (H5) was spin-coated and irradiated with UV light. After washing the physisorbed H5 molecules, contact angle measurement and ellipsometry showed that the H5 molecules can be tethered to the ITO surface via the BP-SAM. Organic light-emitting diodes (OLEDs) were prepared in the structure of ITO/H5 hole transport layer/tris(8-hydroxyquinolato) aluminum/bathocuproin/LiF/Al electrode with and without the BP-SAM layer on the surface of ITO. The device with the BP-SAM showed higher current density and higher luminance due to the improvement of contact at the ITO/H5 interface by forming covalent bonds via the BP-SAM.

Publication: IEICE TRANSACTIONS on Electronics Vol.E96-C No.3 pp.365-368

Publication Date: 2013/03/01

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Online ISSN: 1745-1353

DOI: 10.1587/transele.E96.C.365

Type of Manuscript: BRIEF PAPER

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Seong-Ho KIM, Hanae OHTSUKA, Rigoberto C. ADVINCULA, Kuniaki TANAKA, Hiroaki USUI, "Effect of Photoreactive SAM at the Interface of an Indium-Tin Oxide Electrode and a Polymer Hole Transport Layer" in IEICE TRANSACTIONS on Electronics, vol. E96-C, no. 3, pp. 365-368, March 2013, doi: 10.1587/transele.E96.C.365.
Abstract: A self-assembled monolayer having a benzophenone unit as a photoreactive terminal group (BP-SAM) was prepared on an indium-tin oxide (ITO) electrode, on which a hole-transport layer of a phenoxazine-dioctylfluorene copolymer (H5) was spin-coated and irradiated with UV light. After washing the physisorbed H5 molecules, contact angle measurement and ellipsometry showed that the H5 molecules can be tethered to the ITO surface via the BP-SAM. Organic light-emitting diodes (OLEDs) were prepared in the structure of ITO/H5 hole transport layer/tris(8-hydroxyquinolato) aluminum/bathocuproin/LiF/Al electrode with and without the BP-SAM layer on the surface of ITO. The device with the BP-SAM showed higher current density and higher luminance due to the improvement of contact at the ITO/H5 interface by forming covalent bonds via the BP-SAM.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.E96.C.365/_p

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@ARTICLE{e96-c_3_365,
author={Seong-Ho KIM, Hanae OHTSUKA, Rigoberto C. ADVINCULA, Kuniaki TANAKA, Hiroaki USUI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Effect of Photoreactive SAM at the Interface of an Indium-Tin Oxide Electrode and a Polymer Hole Transport Layer},
year={2013},
volume={E96-C},
number={3},
pages={365-368},
abstract={A self-assembled monolayer having a benzophenone unit as a photoreactive terminal group (BP-SAM) was prepared on an indium-tin oxide (ITO) electrode, on which a hole-transport layer of a phenoxazine-dioctylfluorene copolymer (H5) was spin-coated and irradiated with UV light. After washing the physisorbed H5 molecules, contact angle measurement and ellipsometry showed that the H5 molecules can be tethered to the ITO surface via the BP-SAM. Organic light-emitting diodes (OLEDs) were prepared in the structure of ITO/H5 hole transport layer/tris(8-hydroxyquinolato) aluminum/bathocuproin/LiF/Al electrode with and without the BP-SAM layer on the surface of ITO. The device with the BP-SAM showed higher current density and higher luminance due to the improvement of contact at the ITO/H5 interface by forming covalent bonds via the BP-SAM.},
keywords={},
doi={10.1587/transele.E96.C.365},
ISSN={1745-1353},
month={March},}

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TY - JOUR
TI - Effect of Photoreactive SAM at the Interface of an Indium-Tin Oxide Electrode and a Polymer Hole Transport Layer
T2 - IEICE TRANSACTIONS on Electronics
SP - 365
EP - 368
AU - Seong-Ho KIM
AU - Hanae OHTSUKA
AU - Rigoberto C. ADVINCULA
AU - Kuniaki TANAKA
AU - Hiroaki USUI
PY - 2013
DO - 10.1587/transele.E96.C.365
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E96-C
IS - 3
JA - IEICE TRANSACTIONS on Electronics
Y1 - March 2013
AB - A self-assembled monolayer having a benzophenone unit as a photoreactive terminal group (BP-SAM) was prepared on an indium-tin oxide (ITO) electrode, on which a hole-transport layer of a phenoxazine-dioctylfluorene copolymer (H5) was spin-coated and irradiated with UV light. After washing the physisorbed H5 molecules, contact angle measurement and ellipsometry showed that the H5 molecules can be tethered to the ITO surface via the BP-SAM. Organic light-emitting diodes (OLEDs) were prepared in the structure of ITO/H5 hole transport layer/tris(8-hydroxyquinolato) aluminum/bathocuproin/LiF/Al electrode with and without the BP-SAM layer on the surface of ITO. The device with the BP-SAM showed higher current density and higher luminance due to the improvement of contact at the ITO/H5 interface by forming covalent bonds via the BP-SAM.
ER -