Effect of molecular weight on amplified spontaneous emission in π-conjugated polymer solutions

Sheng Zhang; Shuo Liu; Xufei Wu; Shuai Guan; Yuchen Wang; Hongsheng Li

doi:10.1117/12.2628506

16 February 2022 Effect of molecular weight on amplified spontaneous emission in π-conjugated polymer solutions

Sheng Zhang, Shuo Liu, Xufei Wu, Shuai Guan, Yuchen Wang, Hongsheng Li

Proceedings Volume 12164, International Conference on Optoelectronic Materials and Devices (ICOMD 2021); 121641Z (2022) https://doi.org/10.1117/12.2628506
Event: 2021 International Conference on Optoelectronic Materials and Devices, 2021, Guangzhou, China

Abstract

π-conjugated polymers (PCPs) are suitable gain materials for laser applications due to their high photoluminescence (PL) quantum yield. However, the effect of molecular weight on amplified spontaneous emission (ASE) of PCPs is unknown. In this work, we investigated ASE in poly [2-methoxy-5-(2'ethylhexyloxy)-1, 4-phenylethylene] (MEH-PPV) with different molecular weight in 0.5 mg/mL, 1 mg/mL and 2 mg/mL solutions by using a pulsed laser with pulse width of 10 ns. The molecular weights are 40000-70000, 70000-100000, and 100000-150000, respectively. We found that the threshold decreases as the molecular weight increases, which is due to higher emission intensity at larger molecular weight. In addition, the threshold decreases with concentration increasing, this is because slightly aggregation is helpful for ASE. Our results have shown that molecular weight as well as concentration play an important role in the ASE threshold in MEH-PPV solutions, as well as PCP lasers.

Citation Download Citation

Sheng Zhang, Shuo Liu, Xufei Wu, Shuai Guan, Yuchen Wang, and Hongsheng Li "Effect of molecular weight on amplified spontaneous emission in π-conjugated polymer solutions", Proc. SPIE 12164, International Conference on Optoelectronic Materials and Devices (ICOMD 2021), 121641Z (16 February 2022); https://doi.org/10.1117/12.2628506

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available