Details

Autor(en) / Beteiligte

• Gao, Jing
• Chen, Wei
• Dou, Letian
• Chen, Chun-Chao
• Chang, Wei-Hsuan
• Liu, Yongsheng
• Li, Gang
• Yang, Yang

Titel

Elucidating Double Aggregation Mechanisms in the Morphology Optimization of Diketopyrrolopyrrole-Based Narrow Bandgap Polymer Solar Cells

Ist Teil von

• Advanced materials (Weinheim), 2014-05, Vol.26 (19), p.3142-3147

Ort / Verlag

Germany: Blackwell Publishing Ltd

Erscheinungsjahr

2014

Quelle

Wiley Online Library

Beschreibungen/Notizen

• The power conversion efficiency (PCE) of a DPP‐based polymer solar cell is significantly improved by using DIO or DCB as processing additives. The discovery that DCB outperforms DIO with a significantly wider solvent mixture operation window suggests different optimization mechanisms. Although both solvent mixture systems involve double aggregation processes, including a similar solution‐to‐film aggregation, however, two distinct solution‐stage aggregations are observed: relatively amorphous polymer aggregates form in the CF‐DIO solution, while more crystalline polymer aggregates form in CF‐DCB solution.