In:
Macromolecular Chemistry and Physics, Wiley, Vol. 219, No. 7 ( 2018-04)
Abstract:
Optical gain properties of blue emission oligomer 7‐unit 9,9‐dihexylfluorene (7F6) and its blends with polystyrene (PS) are reported. 7F6 demonstrates high photoluminescence quantum yield (65%), low amplified spontaneous emission threshold ( E th ASE = 0.6 kW cm −2 ), high gain coefficient ( g = 90.9 cm −1 ), and extremely low distributed feedback laser threshold ( E th laser = 86 W cm −2 ). Unlike polymer gain materials, the phase separation between 7F6 and PS is small even in a high blending ratio. The 70 and 50 wt% 7F6/PS blends display excellent gain properties with g = 70.7 and 64.3 cm −1 , E th ASE = 1.1 and 2.1 kW cm −2 , and E th laser = 0.3 and 0.41 kW cm −2 , respectively. The photostability and thermal stability are improved significantly by blending 7F6 into PS. These results promise 7F6/PS blends as a potential core material for expanding the bandwidth of plastic optical fiber.
Type of Medium:
Online Resource
ISSN:
1022-1352
,
1521-3935
DOI:
10.1002/macp.201700527
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
1475026-0
Permalink