Hi, Vikash,

To practice how to make organic solar cells, using well known device structure such as P3HT:PCBM as an active layer is recommended. Fullerene as an acceptor is cheaper cost than non-fullerene acceptors as far as I am aware of.

Once you have skills how to fabricate a solar cell, you could use new materials for your research to investigate different properties.

Hope it helps.

While Wang is correct, in that a good starting point is to use a well studied system, your question instead asks about the possible future of OPV.

OPV has experienced a recent revitalization as power conversion efficiencies now exceed 10% in single junctions, and the recent improvements have not relied on fullerenes. The priority in the field seems to be aimed at understanding what drives charge separation and how to reduce nonradiative recombination in order to optimize the open circuit voltage. Trying to find the best donor to optimize the polymer:fullerene system is to narrow of a viewpoint. I'd recommend you read recent reviews by Richard Friend, Guillermo Bazan, Olle Ignanas, Iain McCulloch, etc.

Xuhua Wang ma'am you have given a great suggestion and I was also planning for the same that initially i will work on P3HT: PCBM or PTB7th:PCBM system after that i will switch to other new materials.

Paul D Cunningham Sir thank you so much for your guidance and I m certainly going to read your recommended articles.