Recently, Prof. JIU Tonggang's group from Qingdao Institute of Bioenergy and Bioprocess Technology of Chinese Academy of Sciences, in collaboration with LI Yuliang, firstly reported that the introduction of certain amount of graphdiyne (25%) as a host material in perovskite solar cells can successfully push the device efficiency up to 21.01%, achieving multiple collaborative effects of highly crystalline qualities, large domain sizes and few grain boundaries.
Furthermore, researchers revealed that the current-voltage hysteresis was negligible, and device stability was appreciably improved as well.
It is found that graphdiyne, as the host active material, significantly affects the crystallization, film morphology and a series of optoelectronic properties of perovskite active layer.
This study, published in Nano Letters, revealed the marvelous role of graphdiyne in solar cells and sheds new light on future studies on developing novel perovskite solar cells.
Figure: The architecture of PSCs with GD as a host material (Image by ZHAO Chengjie)
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