In this work, researchers studied the outdoor and indoor photovoltaic performance of LHP-based devices utilizing Spiro-OMeTAD as the hole-transport material with commonly used dopants such as lithium bis(trifluoromethanesulfonyl)imide (Li-TFSI) or without any dopants.
Is doping of Spiro-OMeTAD a requirement for efficient and stable perovskite indoor photovoltaics?
