Next Article in Journal
New Three-Dimensional Poly(decanediol-co-tricarballylate) Elastomeric Fibrous Mesh Fabricated by Photoreactive Electrospinning for Cardiac Tissue Engineering Applications
Next Article in Special Issue
Optical Waveguide Tunable Phase Delay Lines Based on the Superior Thermo-Optic Effect of Polymer
Previous Article in Journal
Angular Photochromic LC Composite Film for an Anti-Counterfeiting Label
Previous Article in Special Issue
Highly Efficient Luminescent Polycarboxylate Lanthanide Complexes Incorporated into Di-Ureasils by an In-Situ Sol—Gel Process
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle
Polymers 2018, 10(4), 454;

Thermal Dependence of Optical Parameters of Thin Polythiophene Films Blended with PCBM

Materials Engineering, Mechanical Department, Cracow University of Technology, Jana Pawła II 37 str., 31-867 Cracow, Poland
Department of Electronics, AGH University of Science and Technology, Mickiewicza 30 Av., 30-059 Cracow, Poland
Institute of Physics, Cracow University of Technology, Warszawska 24 str., 30-841 Cracow, Poland
Author to whom correspondence should be addressed.
Received: 22 February 2018 / Revised: 4 April 2018 / Accepted: 17 April 2018 / Published: 19 April 2018
(This article belongs to the Special Issue Polymeric Materials for Optical Applications)
Full-Text   |   PDF [2474 KB, uploaded 3 May 2018]   |  


The main purpose of this work is to show the thermal dependence of the refractive and extinction indices of conjugated polymer films used in optoelectronics devices. Herein, we present the results of optical investigations performed for the following polymers: poly(3-hexylthiophene) (P3HT), poly(3-octylthiophene) (P3OT), and their blends with [6,6]-phenyl C61 butyric acid methyl ester (PCBM). For our analysis, we chose well-known polythiophenes such P3HT and P3OT, often used in photovoltaic cells. Our addition of PCMB to the polythiophenes allows their conversion efficiency to be increased. This paper presents the results of our investigation determining the spectral dispersion of optical constants in a wavelength range of 190–1700 nm by using spectroscopic ellipsometry (SE). Furthermore, we show the temperature dependence of the refractive indices of polythiophene films for a heating and a cooling process in the temperature range 25–130 °C. Additionally, thermo-optic coefficients and an optical gap were established and are presented in the paper, followed by a discussion on the conditions of the thermal stability of polythiophene blends and reversibility issues in thermal processes. Our paper presents a new and fresh analysis of depolarization beams after their reflection from the studied films. The paper presents the results of thermo-optical studies of polymer blends which have not been included in previously published works. View Full-Text
Keywords: conjugated thin films; polythiophene blends; spectroscopic ellipsometry; thermo-optical investigations conjugated thin films; polythiophene blends; spectroscopic ellipsometry; thermo-optical investigations

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Jaglarz, J.; Małek, A.; Sanetra, J. Thermal Dependence of Optical Parameters of Thin Polythiophene Films Blended with PCBM. Polymers 2018, 10, 454.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top