Premium
A Strategy to Produce High Efficiency, High Stability Perovskite Solar Cells Using Functionalized Ionic Liquid‐Dopants
Author(s) -
Zhang Yi,
Fei Zhaofu,
Gao Peng,
Lee Yonghui,
Tirani Farzaneh Fadaei,
Scopelliti Rosario,
Feng Yaqing,
Dyson Paul J.,
Nazeeruddin Mohammad Khaja
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201702157
Subject(s) - dopant , materials science , perovskite (structure) , energy conversion efficiency , iodide , solar cell , ionic liquid , doping , ionic bonding , salt (chemistry) , inorganic chemistry , perovskite solar cell , chemical engineering , organic chemistry , catalysis , ion , chemistry , optoelectronics , engineering
Functionalized imidazolium iodide salts (ionic liquids) modified with CH 2 CHCH 2 , CH 2 CCH, or CH 2 CN groups are applied as dopants in the synthesis of CH 3 NH 3 PbI 3 ‐type perovskites together with a fumigation step. Notably, a solar cell device prepared from the perovskite film doped with the salt containing the CH 2 CHCH 2 side‐chain has a power conversion efficiency of 19.21%, which is the highest efficiency reported for perovskite solar cells involving a fumigation step. However, doping with the imidazolium salts with the CH 2 CCH and CH 2 CN groups result in perovskite layers that lead to solar cell devices with similar or lower power conversion efficiencies than the dopant‐free cell.