The Regulation And Optimization Of Graphdiyne Base Perovskite Solar

Owing to the outstanding light-harvesting ability,small exciton binding energy and long carrier life time,organic-inorganic hybrid solar cell is regard as the most promising third-generation solar cells.Although the significant achievements have been obtained,there exits much deterioration hinders perovskite solar cells toward Shockley–Queisser limit efficiency?31%?,such as the traps caused non-radiative recombination on grain boundaries and interface,the mismatching of energy level,the band-tail energy loss.Graphdiyne is a kind of innovative carbon allotropes,the sp-C and sp²-C conjugated two-dimension framework endows graphdiyne with highly conductivity and semiconductor properties.In this article,we introduce graphdiyne into active layer or transport layer to improve the performance of perovskite solar cells.The main content included two different works:?1?We introduced Triazine-Graphdiyne?Tra-GD?into the active layer and fabricated perovskite/Tra-GD solar cells.The morphology studies showed that Tra-GD assists perovskite growing in a favorable way with enlarged grain sizes and regular polycrystalline.The chemical characterizations proved there exists strong interaction between Pb²⁺ions and Tra-GD,which enables Tra-GD to effectively passivate grain boundaries.The charge transport dynamic prove that Tra-GD promotes charge extraction and transport.The photophysical studies reveal Tra-GD effectively reduce non-radiative recombination loss in the active layer.Consequently,the as-fabricated MAPbI₃ device yielded a peak PCE of20.33%.In addition,when Tra-GD was employed in the FAPbI₃ device and got a PCE of21.16%.?2?We introduced graphdiyne?GD?into the PTAA and fabricated efficient hybrid hole transporting layer.The morphology studies showed that the GD reduced the roughness of PTAA and the hybrid film presents smoother surface than control film.What's more,the GD reduced the interfacial angel of PTAA,resulting in a regular polycrystalline with less pinholes.The GD enhanced the hole mobility of PTAA,leading to a increasing short circuit current(J_sc).Through the carrier transport dynamic analyzation,it was found that GD assist the transport in hole PTAA layer.The perovskite solar cell based on PTAA?GD?layer gave a peak PCE of 19.3%with negligible hysteresis,which is a significant enhancement compared with control device?17.3%?.