High Electrical Conductivity 2D MXene Serves as Additive of Perovskite for Efficient Solar Cells. Issue 47 (9th October 2018)

• Record Type: Journal Article
• Authors: Guo, Zhanglin; Gao, Liguo; Xu, Zhenhua; Teo, Siowhwa; Zhang, Chu; Kamata, Yusuke; Hayase, Shuzi; Ma, Tingli
• Is Part Of: Small. Volume 14:Issue 47(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-10-09
• Subjects: additive -- nucleation -- perovskite solar cells -- Ti3C2Tx MXene; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201802738
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: MXenes, a newly intriguing family of 2D materials, have recently attracted considerable attention owing to their excellent properties such as high electrical conductivity and mobility, tunable structure, and termination groups. Here, the Ti3 C2 T x MXene is incorporated into the perovskite absorber layer for the first time, which aims for efficiency enhancement. Results show that the termination groups of Ti3 C2 T x can retard the crystallization rate, thereby increasing the crystal size of CH3 NH3 PbI3 . It is found that the high electrical conductivity and mobility of MXene can accelerate the charge transfer. After optimizing the key parameters, 12% enhancement in device performance is achieved by 0.03 wt% amount of MXene additive. This work unlocks opportunities for the use of MXene as potential materials in perovskite solar cell applications. Abstract : The 2D Ti3 C2 T x additive can enlarge the grain size of the perovskite film due to the weak interactions between the termination groups (F and OH) and CH3 NH3 I. Due to these interactions, the perovskite nuclei generate around the additive and the number of nuclei is suppressed. Fewer nuclei make the grain size larger than that of the pristine film.