Induced photodegradation of quinoxaline based copolymers for photovoltaic applications
Journal article, 2016
We report here the synthesis and characterization of a series of p-type copolymers, which combine a fluorinated quinoxaline (FQ) acceptor unit either with a differently substituted benzodithiophene (BDT) or an unsubstituted thieno[3,2-b]thiophene (TT). The effect of the structural modifications on the photochemical stability of the resulting films is investigated and then correlated with the photovoltaic performance and lifetime measurements of corresponding photovolatic devices. To this end, we firstly studied the intrinsic stability of each polymer film by monitoring the UV-vis absorption decay, under simulated sunlight, as a function of ageing time. Bulk heterojunction solar cells, based on these polymers as donor materials, were fabricated and tested. Beside the initial values, we monitored the photovoltaic performance during prolonged light soaking in order to evaluate and compare the photostability of more complex systems such as working solar cells.
Polymer solar cells
Photodegradation
Conjugated polymers
Lifetime
Author
Desta Antenehe Gedefaw
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Marta Tessarolo
Istituto per lo Studio dei Materiali Nanostrutturati del C.N.R.
M. Prosa
Istituto per lo Studio dei Materiali Nanostrutturati del C.N.R.
Margherita Bolognesi
Patrik Henriksson
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Wenliu Zhuang
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Mirko Seri
Institute for organic syntheses and photoreactivity (ISOF-CNR)
Michele Muccini
Istituto per lo Studio dei Materiali Nanostrutturati del C.N.R.
Mats Andersson
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Solar Energy Materials and Solar Cells
0927-0248 (ISSN)
Vol. 144 150-158SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER)
European Commission (EC) (EC/FP7/287594), 2011-10-01 -- 2016-03-31.
Subject Categories
Polymer Chemistry
Areas of Advance
Materials Science
DOI
10.1016/j.solmat.2015.08.015