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

Sara Abdulaziz Alfahd,Durairaj Devaraj,Vadivel Masilamani,Mohamad Alsalhi,Wafa Al-Mujammi,Saradh Prasad Rajendra

doi:10.3390/ma10030265

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.

Highlights

Laser is a very versatile instrument that has applications in every aspects of life [1,2], science [3]and technology [4]
The results show that, under sufficient concentration and pump power, this conjugated exhibit fluorescence and laser-induced fluorescence (LIF) at 410 nm and amplified spontaneous polymer could exhibit fluorescence and laser-induced fluorescence (LIF) at 410 nm and amplified emission (ASE) at 415 nm, with a full width half maximum (FWHM) of 4 nm with a conversion spontaneous emission (ASE) at 415 nm, with a full width half maximum (FWHM) of 4 nm with a efficiency of 3.5%
Conjugated polymer materials are a new class of laser material that has been proven to be better than the conventional organic dye laser molecules such as coumarin, fluorescein, and rhodamines

Summary

Introduction

Laser is a very versatile instrument that has applications in every aspects of life [1,2], science [3]. Many materials excite laser action, like fluorescent dyes [5,6], quantum dots [7,8,9]. Conjugated polymers have been the topic of tremendous theoretical and experimental study due to its favorable uses in optical and electronic devices [10,11]. Numerous conjugated polymers have properties such as high electroluminescence efficiency, ultra-minimal operating voltage, decent mechanical elasticity, and simplicity of assembly.

Results

Discussion

Conclusion