纳微快报（英文）2021，Vol.13Issue(4)：234-246,13.
Efficient Two-Dimensional Perovskite Solar Cells Realized by Incorporation of Ti3C2Tx MXene as Nano-Dopants
Efficient Two?Dimensional Perovskite Solar Cells Realized by Incorporation of Ti3C2Tx MXene as Nano?Dopants
摘要
Abstract
Two-dimensional (2D) perovs-kites solar cells (PSCs) have attracted consider-able attention owing to their excellent stability against humidity; however, some imperfectness of 2D perovskites, such as poor crystallinity, dis-ordered orientation, and inferior charge transport still limit the power conversion efficiency (PCE) of 2D PSCs. In this work, 2D Ti3C2Tx MXene nanosheets with high electrical conductivity and mobility were employed as a nanosized additive to prepare 2D Ruddlesden–Popper perovskite films. The PCE of solar cells was increased from 13.69 (without additive) to 15.71％ after incorporating the Ti3C2Tx nanosheets with an optimized concentration. This improved perfor-mance is attributed to the enhanced crystallinity, orientation, and passivated trap states in the 3D phase that result in accelerated charge transfer process in vertical direction. More importantly,the unencapsulated cells exhibited excellent stability under ambient conditions with 55 ± 5％ relative humidity.关键词
2D perovskite solar cells/Ti3C2Tx nanosheets/Trap densities/Vertical orientation/Charge transportKey words
2D perovskite solar cells/Ti3C2Tx nanosheets/Trap densities/Vertical orientation/Charge transport引用本文复制引用
Xin Jin,Lin Yang,Xiao-Feng Wang..Efficient Two-Dimensional Perovskite Solar Cells Realized by Incorporation of Ti3C2Tx MXene as Nano-Dopants[J].纳微快报（英文）,2021,13(4):234-246,13.基金项目
Xin Jin and Lin Yang contribute equally to this work. This work was supported by the National Natural Sci-ence Foundation of China (No. 11974129 to X.-F. W.) and "the Fundamental Research Funds for the Central Universities, Jilin University." （No. 11974129 to X.-F. W.）
