Relating polymer chemical structure to the stability of polymer: fullerene solar cellsDoumon, N. Y., Wang, G., Chiechi, R. & Koster, L. 21-Jun-2017 In : Journal of Materials Chemistry C. 5, 26, p. 6611- 6619 9 p.
Research output: Scientific - peer-review › Article
The design of novel polymers has brought more attention to bulk heterojunction polymer:fullerene solar cells in the past decade. A typical example is the synthesis, through chemical structure engineering, of the benzodithiophene-co-thieno[3,4-b]thiophene (BDT-TT) polymers leading to power conversion efficiency of over 10%. In this work, we study the stability for a set of PBDT-TT polymers. We conduct a systematic UV-degradation study on the solar cells. Most importantly, the paper shows clearly the effect of polymer chemical structure on the UV-degradation pathway of the solar cells. We find that based on the polymer chemical structure, solar cells of polymers with alkoxy side chains are more stable (20% loss in PCE) than those with alkylthienyl side chains (48% loss in PCE) over the period of study. These findings pave the way for new materials that yield efficient as well as stable organic solar cells.
|Pages (from-to)||6611- 6619|
|Number of pages||9|
|Journal||Journal of Materials Chemistry C|
|State||Published - 21-Jun-2017|
- Polymer Chemical structure , Side chains, Polymer solar cells, UV Degradation , Stability , Lifetime, MORPHOLOGY, ADDITIVES, POWER-CONVERSION EFFICIENCY, PHOTOCHEMICAL STABILITY, CONJUGATED POLYMERS, ORGANIC PHOTOVOLTAICS, DEGRADATION, SPECTROSCOPY, PERFORMANCE, LAYER