An Efficient Violet Amplified Spontaneous Emission (ASE) from a Conjugated Polymer (PFO-co-pX) in Solution

Sara Abdulaziz Alfahd; Saradh Prasad Rajendra; Wafa Al-Mujammi; Durairaj Devaraj; Vadivel Masilamani; Mohamad Saleh AlSalhi

doi:10.3390/ma10030265

An Efficient Violet Amplified Spontaneous Emission (ASE) from a Conjugated Polymer (PFO-co-pX) in Solution

Materials (Basel). 2017 Mar 7;10(3):265. doi: 10.3390/ma10030265.

Authors

Sara Abdulaziz Alfahd^{1

2}, Saradh Prasad Rajendra^{3

4

5}, Wafa Al-Mujammi⁶, Durairaj Devaraj⁷, Vadivel Masilamani^{8

9}, Mohamad Saleh AlSalhi^{10

11}

Affiliations

¹ Department of Physics, College of Science in Zulfi, Majmaah Univesrity, Az Zulfi 15981, Riyadh Province, Saudi Arabia. s.alfahd@mu.edu.sa.
² Department of Physics and Astronomy, College of Science, P.O. Box 2455, King Saud University, Riyadh 11451, Saudi Arabia. s.alfahd@mu.edu.sa.
³ Department of Physics and Astronomy, College of Science, P.O. Box 2455, King Saud University, Riyadh 11451, Saudi Arabia. saradprasad@gmail.com.
⁴ Research Chair on Laser Diagnosis of Cancers, Department of Physics, College of Science, P.O. Box 2455, King Saud University, Riyadh 11451, Saudi Arabia. saradprasad@gmail.com.
⁵ Department of Electrical and Electronics, College of Engineering, Kalasalingam University, Anad Nagar, Krishnankoil, Pin code 626190, Virudhunagar district, Tamil Nadu, India. saradprasad@gmail.com.
⁶ Department of Physics and Astronomy, College of Science, P.O. Box 2455, King Saud University, Riyadh 11451, Saudi Arabia. walmujammi@ksu.edu.sa.
⁷ Department of Electrical and Electronics, College of Engineering, Kalasalingam University, Anad Nagar, Krishnankoil, Pin code 626190, Virudhunagar district, Tamil Nadu, India. ddevaraj.klu@gmail.com.
⁸ Department of Physics and Astronomy, College of Science, P.O. Box 2455, King Saud University, Riyadh 11451, Saudi Arabia. masila123@gmail.com.
⁹ Research Chair on Laser Diagnosis of Cancers, Department of Physics, College of Science, P.O. Box 2455, King Saud University, Riyadh 11451, Saudi Arabia. masila123@gmail.com.
¹⁰ Department of Physics and Astronomy, College of Science, P.O. Box 2455, King Saud University, Riyadh 11451, Saudi Arabia. malsalhy@gmail.com.
¹¹ Research Chair on Laser Diagnosis of Cancers, Department of Physics, College of Science, P.O. Box 2455, King Saud University, Riyadh 11451, Saudi Arabia. malsalhy@gmail.com.

Abstract

The optical of conjugated polymer poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(2,5-p-xylene)] also known as [(PFO-co-pX), ADS145UV], dissolved in a few solvents, has been measured. The absorption, emission spectra, and quantum yield have been investigated by using a spectrophotometer and spectrofluorometer, respectively. The properties of Amplified Spontaneous Emission (ASE) of conjugated PFO-co-pX polymer under different conditions such as solvent type, concentration, and pumping energy have been examined by using the tripled frequency of a Nd:YAG laser as a source of pumping. The relation between output energy and pumping energy for the samples with different concentrations in three solvents has been studied. In addition, efficiency and optical gain from the ASE were measured. Additionally, the stability of this polymer as a laser material was investigated. Among the host of conjugated polymer lasers obtained by optical pumping, this conjugated polymer has exhibited only one ASE band under a wide range of concentrations and pump power values. This is most likely due to the steric hindrance by the copolymer segment pX (2,5-p-xylene). This investigation has provided new insights into the excited state dynamics of conjugated polymer materials and has shown that this new conjugated polymer is quite efficient in the violet region.

Keywords: amplified spontaneous emission (ASE) spectra; conjugated polymer PFO-co-pX; single ASE peak.