TY - JOUR
T1 - Solution-processed anthracene-based molecular glasses as stable blue-light-emission laser gain media
AU - Niu, Qiaoli
AU - Zhang, Qi
AU - Xu, Weidong
AU - Jiang, Yi
AU - Xia, Ruidong
AU - Bradley, Donal D.C.
AU - Li, Dong
AU - Wen, Xuesong
N1 - Generated from Scopus record by KAUST IRTS on 2019-11-27
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Two asymmetric 9,10-disubstituted anthracene-based, solution-processable, molecular glasses were studied in detail as thin-film laser gain media and were found to demonstrate very low amplified spontaneous emission (ASE) thresholds (0.75-1.1 μJ/pulse). Distributed feedback (DFB) lasers fabricated with these materials by spin coating on top of pre-etched silica one-dimensional (1-D) gratings exhibited a minimum laser threshold of 5.7 nJ per pulse (17.7 μJ cm-2) and maximum slope efficiency of 3.6%. The thermal stability of the gain was also investigated, with ASE observed for thermal annealing at temperatures up to 300 °C without any significant increase in threshold. The high thermal stability and low laser threshold make these materials very promising gain media. Comparison of the two glasses demonstrated that whilst fluorine-substitution significantly lowers the HOMO and LUMO levels it does not dramatically affect the gain. Our results suggest a potential approach for materials synthesis to address the challenge of electrically pumping an organic laser.
AB - Two asymmetric 9,10-disubstituted anthracene-based, solution-processable, molecular glasses were studied in detail as thin-film laser gain media and were found to demonstrate very low amplified spontaneous emission (ASE) thresholds (0.75-1.1 μJ/pulse). Distributed feedback (DFB) lasers fabricated with these materials by spin coating on top of pre-etched silica one-dimensional (1-D) gratings exhibited a minimum laser threshold of 5.7 nJ per pulse (17.7 μJ cm-2) and maximum slope efficiency of 3.6%. The thermal stability of the gain was also investigated, with ASE observed for thermal annealing at temperatures up to 300 °C without any significant increase in threshold. The high thermal stability and low laser threshold make these materials very promising gain media. Comparison of the two glasses demonstrated that whilst fluorine-substitution significantly lowers the HOMO and LUMO levels it does not dramatically affect the gain. Our results suggest a potential approach for materials synthesis to address the challenge of electrically pumping an organic laser.
UR - https://linkinghub.elsevier.com/retrieve/pii/S1566119915000130
UR - http://www.scopus.com/inward/record.url?scp=84921948260&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2015.01.012
DO - 10.1016/j.orgel.2015.01.012
M3 - Article
SN - 1566-1199
VL - 18
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
ER -