A comparison of the positional effect of difluorination and the synergistic effect of siloxane-terminated side chains on benzodithiophene-based conjugated polymers for efficient photovoltaic application

Abstract

Halogenation has been proved as one of the most efficient chemical modification strategies to manipulate the energy levels and molecular assembly, while the study of the positional effect of halogen...

Siloxane-induced robust photoactive materials with high humidity tolerance for ambient processing of organic solar cells

“…Introducing siloxane-terminated side chains to partially replace traditional alkyl side chains in polymer donors, 36,[39][40][41][42][43][44] polymer acceptors, 45 small molecular donors, 46 and NFAs 47,48 has been developed by our research group so as to improve OSC efficiency, where enhancement of the face-on orientation, 39,40,46,49 improvement of carrier mobility, 49,50 and tuning of miscibility between a polymer donor and an NFA 12,[41][42][43]47 have been observed. In this work, a new function of high humidity tolerance for air-processed active layer was discovered with PQSi705 compared to PTQ10.…”

Fluorinated Polymer Donors for Nonfullerene Organic Solar Cells

“…By replacing the alkyl chain with the alkoxyl chain on the BDT unit, Li's group synthesized polymer PFOPB. [156] The fluorinated polymer PFOPB demonstrated a lower HOMO level, higher extinction coefficient and higher hole mobility relative to the nonfluorinated polymer POPB. The PFOPB : IT-4F-based devices showed a higher PCE of 11.7 %, while that for POPB was 6.2 %.…”