Probe exciplex structure of highly efficient thermally activated delayed fluorescence organic light emitting diodes
學年 107
學期 1
出版（發表）日期 2018-08-06
作品名稱 Probe exciplex structure of highly efficient thermally activated delayed fluorescence organic light emitting diodes
作品名稱（其他語言）
著者 Tzu-Chieh Lin; Monima Sarma; Yi-Ting Chen; Shih-Hung Liu; Ke-Ting Lin; Pin-Yi Chiang; Wei-Tsung Chuang; Yi-Chen Liu; Hsiu-Fu Hsu; Wen-Yi Hung; Wei-Chieh Tang; Ken-Tsung Wong; Pi-Tai Chou
單位
出版者
著錄名稱、卷期、頁數 Nature Communications 9, 3111(8 pages)
摘要 The lack of structural information impeded the access of efficient luminescence for the exciplex type thermally activated delayed fluorescence (TADF). We report here the pump-probe Step-Scan Fourier transform infrared spectra of exciplex composed of a carbazole-based electron donor (CN-Cz2) and 1,3,5-triazine-based electron acceptor (PO-T2T) codeposited as the solid film that gives intermolecular charge transfer (CT), TADF, and record-high exciplex type cyan organic light emitting diodes (external quantum efficiency: 16%). The transient infrared spectral assignment to the CT state is unambiguous due to its distinction from the local excited state of either the donor or the acceptor chromophore. Importantly, a broad absorption band centered at ~2060 cm−1 was observed and assigned to a polaron-pair absorption. Time-resolved kinetics lead us to conclude that CT excited states relax to a ground-state intermediate with a time constant of ~3 µs, followed by a structural relaxation to the original CN-Cz2:PO-T2T configuration within ~14 µs.
關鍵字
語言 en_US
ISSN 2041-1723
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Wen-Yi Hung; Ken-Tsung Wong; Pi-Tai Chou
審稿制度 否
國別 TWN
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/115556 )

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