Novel linear and hyperbranched polythiophene derivatives containing diketopyrrolopyrroles as linking groups

Sheng-Hsiung Yang, Chia Hao Hsieh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations


The goal of this research is to synthesize novel linear and hyperbranched polythiophene derivatives containing diketopyrrolopyrrole (DPP) as linking groups, and to investigate thermal, optical, electrochemical, and photovoltaic properties of those derivatives. Polymers with high regioregularity were synthesized via the Universal Grignard metathesis polymerization. Those linear or hyperbranched polythiophenes containing DPP bridging moieties showed higher molecular weights and better thermal stability compared with normal P3HT. The UV-vis absorption spectra of the DPP-containing polymers are similar to that of P3HT in film state, while they show distinct attenuation in fluorescent emission. Finally, all polymers were blended with PCsiBM and used as active layers for fabrication of inverted solar devices. The devices based on those DPP-containing polythiophenes revealed the open-circuit voltage (Koc) of 0.55- 0.58 V, the short-circuit current (Jsc) of 8.62-16.21 mA/cm2, the fill factor (FF) of 36-41%, and the power conversion efficiency (PCE) of 1.73-3.74%.

Original languageEnglish
Title of host publicationRecent Advances in Photovoltaics
EditorsMarkus Gloeckler, Jean V. Manca, Tingkai Li, Ivan Mora-Sero, Akira Yamada, Tsutomu Miyasaka, Yanfa Yan, Jin Young Kim, Koen Vandewal, Kai Zhu, Qi Wang, Ayodhya N. Tiwari, Mats Andersson, Emilio Palomares, Michael Mastro, Meng Tao
PublisherMaterials Research Society
Number of pages7
ISBN (Electronic)9781605117485
StatePublished - 1 Jan 2016
Event2015 MRS Spring Meeting - San Francisco, United States
Duration: 6 Apr 201510 Apr 2015

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Conference2015 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco


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