Effect of reverse intersystem crossing rate to suppress efficiency roll-off in organic light-emitting diodes with thermally activated delayed fluorescence emitters
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- 作者：Munetomo Inouea ; b ; 1 ; Tomas Serevičiusb ; c ; 1 ; Hajime Nakanotania ; b ; d ; e ; Kou Yoshidaa ; b ; Toshinori Matsushimab ; d ; Saulius Jur&scaron ; ėnasc ; Chihaya Adachia ; b ; d ; e ; adachi@cstf.kyushu-u.ac.jp" class="auth_mail" title="E-mail the corresponding author
- 刊名：Chemical Physics Letters
- 出版年：2016
- 出版时间：16 January 2016
- 年：2016
- 卷：644
- 期：Complete
- 页码：62-67
- 全文大小：1288 K
文摘
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EL efficiency roll-off in OLEDs based on TADF emitters was investigated.
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Rate constants of intramolecular exciton relaxation processes were investigated.
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EL roll-off was dramatically suppressed with an emitter showing faster RISC.
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Initial EL decreasing caused by strong STA occurred when RISC was lower.
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Faster RISC reduced triplet exciton density and suppressed STA and TTA.