A four-directional non-fullerene acceptor based on tetraphenylethylene and diketopyrrolopyrrole functionalities for efficient photovoltaic devices with a high open-circuit voltage of 1.18 V.
Through the conjunction of tetraphenylethylene and diketopyrrolopyrrole functionalities, a novel four-directional non-fullerene electron acceptor (denoted as 4D) was designed, synthesized and characterized. The new chromophore is highly soluble (for instance >30 mg mL(-1) in o-dichlorobenzene), thermally stable, and exhibits energy levels matching those of the conventional and routinely used donor polymer poly(3-hexyl thiophene). A power conversion efficiency of 3.86% was obtained in solution-processable bulk-heterojunction devices with a very high open circuit voltage of 1.18 V.
School of Science, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia. sheshanath.bhosale@rmit.edu.au.
Anushri
A
Rananaware
School of Science, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia. sheshanath.bhosale@rmit.edu.au and Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia. akhil.gupta@deakin.edu.au.
Akhil
A
Gupta
Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia. akhil.gupta@deakin.edu.au.
JingLiang
J
Li
Virtual Nanoscience Lab, CSIRO Manufacturing, Parkville, Victoria 3052, Australia.
Ante
A
Bilic
School of Science, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia. sheshanath.bhosale@rmit.edu.au and Centre for Advanced Materials and Industrial Chemistry (CAMIC), RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
Lathe
L
Jones
Centre for Advanced Materials and Industrial Chemistry (CAMIC), RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
Suresh
S
Bhargava
School of Science, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia. sheshanath.bhosale@rmit.edu.au.
Sheshanath V
SV
Bhosale