Jilin University Wang Xiaofeng et al: MXene nanosheets help improve the performance of 2D perovskite cells

North Konami can provide MXene nanosheets (customizable)





Compared with conventional 3D perovskites, the 2D Ruddlesden-Pop organic-inorganic metal halide perovskite device exhibits excellent environmental stability, in addition to the simple preparation process, tunable energy band structure and modified 3D perovskite. The advantages of the interface all show great prospects for application in photovoltaic devices. However, during the carrier transport process, the large organic spacer cations between the 2D perovskite layers greatly hinders the efficient transport of charge carriers, so the vertical orientation and excellent crystallinity of the 2D perovskite films are achieved. The key to its high efficiency.


Efficient Two‑Dimensional Perovskite Solar Cells Realized by Incorporation of Ti₃C₂Tₓ MXene as Nano‑Dopants

Xin Jin, Lin Yang, Xiao-Feng Wang*

Nano-Micro Letters (2021)13: 68

https://doi.org/10.1007/s40820-021-00602-w



Highlights of this article

1. 2D Ti₃C₂Tₓ MXene has the advantages of high electrical conductivity, high mobility, and abundant surface functional groups. In this paper, it is used as a nano-additive to prepare 2D perovskite thin films.

2. Through the doping of Ti₃C₂Tₓ nanosheets, the defect passivation, crystallinity and orientation enhancement of perovskite films are realized.

3. Finally, the effective transport of charge carriers in the vertical direction is realized to promote the improvement of short-circuit current density and photoelectric conversion efficiency of 2D perovskite devices.



brief introduction

In this work, the research group of Wang Xiaofeng from Jilin University added Ti₃C₂Tₓ as a nano-additive to the precursor solution of perovskite to prepare perovskite thin films. In addition to passivating the surface of the perovskite film, this nano-additive also improves the crystallinity and orientation of the film. All of these promote the rapid transport of charge carriers in the vertical direction, and ultimately promote the effective improvement of the short-circuit current density (Jsc) and photoelectric conversion efficiency (PCE) of perovskite photovoltaic devices. This work demonstrates the great potential of 2D MXene materials for applications in the field of perovskite solar cells.