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.

Lifetime

Conjugated polymers

Polymer solar cells

Photodegradation

Author

Desta Antenehe Gedefaw

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Marta Tessarolo

Istituto Per Lo Studio Dei Materiali Nanostrutturati, Rome

M. Prosa

Istituto Per Lo Studio Dei Materiali Nanostrutturati, Rome

Margherita Bolognesi

Patrik Henriksson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Wenliu Zhuang

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Mirko Seri

Istituto per la Sintesi Organica e la Fotoreattività

Michele Muccini

Istituto Per Lo Studio Dei Materiali Nanostrutturati, Rome

Mats Andersson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Solar Energy Materials and Solar Cells

0927-0248 (ISSN)

Vol. 144 150-158

SUstainable Novel FLexible Organic Watts Efficiently Reliable (SUNFLOWER)

European Commission (FP7), 2011-10-01 -- 2016-03-31.

Subject Categories

Polymer Chemistry

Areas of Advance

Materials Science

DOI

10.1016/j.solmat.2015.08.015

More information

Created

10/8/2017