English  |  正體中文  |  简体中文  |  Items with full text/Total items : 28611/40649
Visitors : 629783      Online Users : 88
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/47106

Title: Remote Steric Effect as a Facile Strategy for Improving the Efficiency of Exciplex-Based OLEDs
Authors: Ken-Tsung Wong
Wen-Yi Hung
Ting-Chih Wang
Pin-Yi Chiang
Bo-Ji Peng
Contributors: 國立臺灣海洋大學:光電科學研究所
Keywords: thermally activated delayed fluorescence (TADF)
bulky substitution
intermolecular charge transfer
remote steric effect
Date: 2017-02
Issue Date: 2018-07-03
Publisher: ACS Applied Materials & Interfaces
Abstract: Abstract: This work reports a new strategy of introducing remote steric effect onto the electron donor for giving the better performance of the exciplex-based organic light-emitting device (OLED). The bulky triphenylsilyl group (SiPh3) was introduced onto the fluorene bridge of 4,4′-(9H-fluorene-9,9-diyl)bis(N,N-di-p-tolylaniline) (DTAF) to create remote steric interactions for increasing the possibility of effective contacts between electron-donating chromophores and acceptor molecules, rendering the resulting exciplex to have a higher photoluminescence quantum yield (PLQY). The green exciplex device based on DSDTAF:3N-T2T (1:1) as an emitting layer exhibits a low turn-on voltage of 2.0 V, high maximum efficiencies (13.2%, 42.9 cd A–1, 45.5 lm W–1), which are higher than the device employed DTAF (without SiPh3 groups) (11.6%, 35.3 cd A–1, 41.3 lm W–1) as donor under the same device structure. This strategy was further examined for blue exciplex, where the EQE was enhanced from 9.5% to 12.5% as the electron acceptor PO-T2T mixed with a tert-butyl group substituted carbazole-based donor (CPTBF) as the emitting exciplex in device. This strategy is simple and useful for developing high performance exciplex OLEDs.
Relation: 9 (8) pp.7355–7361
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/47106
Appears in Collections:[光電科學研究所] 期刊論文

Files in This Item:

File Description SizeFormat

All items in NTOUR are protected by copyright, with all rights reserved.


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback