Novel oxygen sensor based on terfluorene thin-film and its enhanced sensitivity by stimulated emission

作者：Lin Hao Wu^*; Huang Ming Hong; Chen Yi Hong; Lin Wei Chieh; Cheng Hsing Chieh; Wu Chung Chih; Chao Teng Chih; Wang Ting Chih; Wong Ken Tsung; Tang Kuo Chun; Chou Pi Tai

来源：Journal of Materials Chemistry, 2012, 22(27): 13446-13450.

DOI：10.1039/c2jm30739a

Ter(9,9-diarylfluorene) (TDF) neat film featuring oxygen sensing with advantages of fast response, reversibility and high efficiency is reported. The fast O-2 fluorescence quenching process (4.0 x 10(10) M-1 s(-1)) is unique and is mainly due to intact amorphous morphology of the TDF film, providing ample porous sites in nature so that O-2 can travel therein freely. This, together with a large S-1-T-1 energy gap of TDF, leads to efficient O-2 sensitization, i.e. the O-2 induced S-1-T-1 intersystem crossing. The sensitivity can be further enhanced up to similar to 10-fold and similar to 20-fold in amplified spontaneous emission (ASE) and lasing action, respectively. The work thus demonstrated a new class of organic materials suited for high-speed, high-sensitivity oxygen sensing.

• 出版日期2012
• 单位清华大学