TY - JOUR
T1 - Solution-Phase Epitaxial Growth of Perovskite Films on 2D Material Flakes for High-Performance Solar Cells
AU - Tang, Guanqi
AU - You, Peng
AU - Tai, Qidong
AU - Yang, Anneng
AU - Cao, Jiupeng
AU - Zheng, Fangyuan
AU - Zhou, Zhiwen
AU - Zhao, Jiong
AU - Chan, Paddy Kwok Leung
AU - Yan, Feng
PY - 2019/6/13
Y1 - 2019/6/13
N2 - The quality of perovskite films is critical to the performance of perovskite solar cells. However, it is challenging to control the crystallinity and orientation of solution-processed perovskite films. Here, solution-phase van der Waals epitaxy growth of MAPbI3 perovskite films on MoS2 flakes is reported. Under transmission electron microscopy, in-plane coupling between the perovskite and the MoS2 crystal lattices is observed, leading to perovskite films with larger grain size, lower trap density, and preferential growth orientation along (110) normal to the MoS2 surface. In perovskite solar cells, when perovskite active layers are grown on MoS2 flakes coated on hole-transport layers, the power conversion efficiency is substantially enhanced for 15%, relatively, due to the increased crystallinity of the perovskite layer and the improved hole extraction and transfer rate at the interface. This work paves a way for preparing high-performance perovskite solar cells and other optoelectronic devices by introducing 2D materials as interfacial layers.
AB - The quality of perovskite films is critical to the performance of perovskite solar cells. However, it is challenging to control the crystallinity and orientation of solution-processed perovskite films. Here, solution-phase van der Waals epitaxy growth of MAPbI3 perovskite films on MoS2 flakes is reported. Under transmission electron microscopy, in-plane coupling between the perovskite and the MoS2 crystal lattices is observed, leading to perovskite films with larger grain size, lower trap density, and preferential growth orientation along (110) normal to the MoS2 surface. In perovskite solar cells, when perovskite active layers are grown on MoS2 flakes coated on hole-transport layers, the power conversion efficiency is substantially enhanced for 15%, relatively, due to the increased crystallinity of the perovskite layer and the improved hole extraction and transfer rate at the interface. This work paves a way for preparing high-performance perovskite solar cells and other optoelectronic devices by introducing 2D materials as interfacial layers.
KW - 2D materials
KW - epitaxial growth
KW - perovskite solar cells
KW - power conversion efficiency
UR - http://www.scopus.com/inward/record.url?scp=85065065074&partnerID=8YFLogxK
U2 - 10.1002/adma.201807689
DO - 10.1002/adma.201807689
M3 - Journal article
C2 - 31033074
AN - SCOPUS:85065065074
SN - 0935-9648
VL - 31
JO - Advanced Materials
JF - Advanced Materials
IS - 24
M1 - 1807689
ER -